GTR-V1.0-Stepper-Driver-Jumper-Configuration-Manual

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GTR-V1.0-Stepper-Driver-Jumper-Configuration-Manual

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GTR V1.0 Stepper Driver Jumper Configuration Manual

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# GTR-V1.0-Stepper-Driver-Jumper-Configuration-Manual

:exclamation: This project provides and Interactive PDF (documentation) on how to configure stepper motor 
driver boards and how to use them with the GTR V1.0 (3D printer controller) board.  This manual also 
shows the user how to connect additional equipment to the GTR V1.0 Board: Raspberry Pi, BLTouch, 
BTT Smart Filament Sensor, 
PT100 sensor via Analog ADC I/O Input (PT100 Amplifier), 
PT100 sensor via Software SPI (Adafruit MAX31865 Amplifier), 
PT100 sensor via Hardware SPI (Adafruit MAX31865 Amplifier),
K-Type Thermocouple via Analog ADC I/O Input (Adafruit AD8495 Amplifier), 
K-Type Thermocouple via Software SPI (MAX31855 Amplifier),
K-Type Thermocouple via Hardware SPI (MAX31855 Amplifier) and
Link to TWhite101 Instructable on how to add an EEPROM :exclamation:
```
I use Git for Windows with VScode to manage this repository.  I also use Git LFS extensions
for .pdf and .png files.

Install Git with LFS extensions: https://git-lfs.github.com/

To Download the whole repository do the following: select the "Clone or download button" and 
click on "paste to clipboard" button so you can place the URL for the GitHub repository 
to the clipboard. Now Open Git Bash.  Change the current working directory to the location 
where you want the cloned directory.
Type git clone, and then paste the URL you copied earlier.
$ git clone https://github.com/GadgetAngel/GTR-V1.0-Stepper-Driver-Jumper-Configuration-Manual.git
Press Enter to create your local clone.
Now open Window explorer to the location of local clone.
```
## The Whole Repository in .zip file is located on Google Drive at: 
## https://drive.google.com/file/d/1Z5O7lneAJsEqTo4KERxGlFos52tKStWb/view?usp=sharing

## Table of Contents:

```
Stepper Driver Jumper Configurations for GTR V1.0 Board
By       @GadgetAngel

ABOUT.............................................................................................................I
Preface...........................................................................................................1
  What is a Stepper motor?........................................................................................2
  Stall Detection and Sensor-less Homing..........................................................................3
    Requirements Needed to Make Sensor-less Homing Work...........................................................3
  Introduction to LEGENDS and Common Terminology in this Manual...................................................4
POLOLU A4988......................................................................................................6
  Driver Chip Chart for POLOLU A4988..............................................................................6
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set...............7
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board..............................................8
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have RST&SLP Set..10
  The (latest release of) Marlin Setup for POLOLU A4988 Drivers..................................................15
BIQU A4988.......................................................................................................17
  Driver Chip Chart for BIQU A4988...............................................................................17
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set..............18
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board.............................................19
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have
    RST&SLP Set..................................................................................................21
  The (latest release of) Marlin Setup for BIQU A4988 Drivers....................................................26
DRV8825..........................................................................................................28
  Driver Chip Chart for DRV8825..................................................................................28
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set..............29
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board.............................................30
  GTR V1.0 LEGEND of Driver Socket Representation for Binary Sta...............32
  The (latest release of) Marlin Setup for DRV8825 Drivers.......................................................38
BIQU LV8729......................................................................................................41
  Driver Chip Chart for BIQU LV8729..............................................................................41
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set.......42
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have
    RST&SLP Set..................................................................................................44
  The (latest release of) Marlin Setup for BIQU LV8729 Drivers...................................................50
FYSETC LV8729....................................................................................................54
  Driver Chip Chart for FYSETC LV8729............................................................................54
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set.......55
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have
    RST&SLP Set..................................................................................................57
  The (latest release of) Marlin Setup for FYSETC LV8729 Drivers.................................................63
LERDGE LV8729....................................................................................................67
  Driver Chip Chart for LERDGE LV8729............................................................................67
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set.......68
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have
    RST&SLP Set..................................................................................................70
  The (latest release of) Marlin Setup for LERDGE LV8729 Drivers.................................................76
MKS LV8729.......................................................................................................80
  Driver Chip Chart for MKS LV8729...............................................................................80
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set.......81
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have 
    RST&SLP Set..................................................................................................83
  The (latest release of) Marlin Setup for MKS LV8729 Drivers....................................................89
FYSETC S6128 V1.1................................................................................................93
  Driver Chip Chart for FYSETC S6128 V1.1........................................................................93
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set..............94
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board.............................................95
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have RST&SLP Set..97
  The (latest release of) Marlin Setup for FYSETC S6128 V1.1 Drivers............................................103
FYSETC ST820....................................................................................................107
  Driver Chip Chart for FYSETC ST820............................................................................107
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set.............108
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board............................................109
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have
    RST&SLP Set.................................................................................................111
  The (latest release of) Marlin Setup for FYSETC ST820 Drivers.................................................117
BIQU ST820......................................................................................................122
  Driver Chip Chart for BIQU ST820..............................................................................122
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set.............123
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board............................................124
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have
    RST&SLP Set.................................................................................................126
  The (latest release of) Marlin Setup for BIQU ST820 Drivers...................................................132
POLOLU ST820 (STSPIN820)........................................................................................137
  Driver Chip Chart for POLOLU ST820 (STSPIN820)................................................................137
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set.............138
    Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board............................................139
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have
    RST&SLP Set.................................................................................................141
  The (latest release of) Marlin Setup for POLOLU ST820 (STSPIN820) Drivers.....................................147
POLOLU MP6500...................................................................................................152
  Driver Chip Chart for POLOLU MP6500...........................................................................152
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set......153
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have 
    RST&SLP Set.................................................................................................155
  The (latest release of) Marlin Setup for POLOLU MP6500 Drivers................................................159
POLOLU TB67S249FTG..............................................................................................163
  Driver Chip Chart for POLOLU TB67S249FTG......................................................................163
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set......164
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have 
    RST&SLP Set.................................................................................................166
  The (latest release of) Marlin Setup for POLOLU TB67S249FTG Drivers...........................................172
BIQU S109.......................................................................................................176
  Driver Chip Chart for BIQU S109...............................................................................176
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set......177
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have
    RST&SLP Set.................................................................................................179
  The (latest release of) Marlin Setup for BIQU S109 Drivers....................................................185
FYSETC S109.....................................................................................................189
  Driver Chip Chart for FYSETC S109.............................................................................189
  GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set......190
  GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have 
    RST&SLP Set.................................................................................................192
  The (latest release of) Marlin Setup for FYSETC S109 Drivers..................................................198
BIQU TMC2100 Stand-alone Mode...................................................................................202
  Driver Chip Chart for BIQU TMC2100 in Stand-alone Mode........................................................202
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 1...................................203
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 2...................................204
  GTR V1.0 LEGEND of Driver Socket Representation for Tri State Stepper Motor Drivers...........................206
  The (latest release of) Marlin Setup for BIQU TMC2100 Drivers in Stand-alone Mode.............................211
MKS TMC2100 Stand-alone Mode....................................................................................215
  Driver Chip Chart for MKS TMC2100 in Stand-alone Mode.........................................................215
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 1...................................216
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 2...................................217
  GTR V1.0 LEGEND of Driver Socket Representation for Tri State Stepper Motor Drivers...........................219
  The (latest release of) Marlin Setup for MKS TMC2100 Drivers in Stand-alone Mode..............................224
BIQU TMC2130 (SA) Stand-alone Mode..............................................................................228
  Driver Chip Chart for BIQU TMC2130 (SA) in Stand-alone Mode...................................................228
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 1...................................229
  GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers - PART 2...................................230
  GTR V1.0 LEGEND of Driver Socket Representation for Tri State Stepper Motor Drivers...........................232
BIQU TMC2130 SPI Mode...........................................................................................241
  Driver Chip Chart for BIQU TMC2130 in SPI Mode................................................................241
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in SPI Mode.........................244
  Information on Sensor-less Homing for GTR V1.0................................................................247
  The (latest release of) Marlin Setup for BIQU TMC2130 Drivers in SPI Mode.....................................252
BIQU TMC2208 V3.0 (SA) Stand-alone Mode for StealthChop.........................................................266
  Driver Chip Chart for BIQU TMC2208 V3.0 (SA) in Stand-alone Mode (StealthChop)................................266
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop)...267
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone
    Mode (StealthChop)..........................................................................................269
  The (latest release of) Marlin Setup for BIQU TMC2208 V3.0 (SA) Drivers in Stand-alone Mode for StealthChop...273
BIQU TMC2208 V3.0 (OTP) Stand-alone Mode for SpreadCycle........................................................277
  Driver Chip Chart for BIQU TMC2208 V3.0 (OTP) in Stand-alone Mode (SpreadCycle)...............................277
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle)...278
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone
    Mode (SpreadCycle)..........................................................................................280
  The (latest release of) Marlin Setup for BIQU TMC2208 V3.0 (OTP) Drivers in Stand-alone Mode for SpreadCycle..284
BIQU TMC2208 V3.0 UART Mode.....................................................................................288
  Driver Chip Chart for BIQU TMC2208 V3.0 in UART Mode..........................................................288
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in UART Mode........................291
  The (latest release of) Marlin Setup for BIQU TMC2208 V3.0 Drivers in UART Mode...............................297
FYSETC TMC2208 V1.2 (SA) Stand-alone Mode for StealthChop.......................................................306
  Driver Chip Chart for FYSETC TMC2208 V1.2 (SA) in Stand-alone Mode (StealthChop)..............................306
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop)...307
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (StealthChop)..........................................................................................309
  The (latest release of) Marlin Setup for FYSETC TMC2208 V1.2 (SA) Drivers in Stand-alone Mode for StealthChop.313
FYSETC TMC2208 V1.2 (OTP) Stand-alone Mode for SpreadCycle......................................................317
  Driver Chip Chart for FYSETC TMC2208 V1.2 (OTP) in Stand-alone Mode (SpreadCycle).............................317
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle)...318
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (SpreadCycle)..........................................................................................320
  The (latest release of) Marlin Setup for FYSETC TMC2208 V1.2 (OTP) Drivers in Stand-alone Mode 
    for SpreadCycle.............................................................................................324
FYSETC TMC2208 V1.2 UART Mode...................................................................................328
  Driver Chip Chart for FYSETC TMC2208 V1.2 in UART Mode........................................................328
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in UART Mode........................331
  The (latest release of) Marlin Setup for FYSETC TMC2208 V1.2 Drivers in UART Mode.............................337
BIQU TMC2225 V1.0 (SA) Stand-alone Mode for StealthChop.........................................................346
  Driver Chip Chart for BIQU TMC2225 V1.0 (SA) in Stand-alone Mode (StealthChop)................................346
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop)...347
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in 
    Stand-alone Mode (StealthChop)..............................................................................349
  The (latest release of) Marlin Setup for BIQU TMC2225 V1.0 (SA) Drivers in Stand-alone Mode for StealthChop...353
BIQU TMC2225 V1.0 (OTP) Stand-alone Mode for SpreadCycle........................................................357
  Driver Chip Chart for BIQU TMC2225 V1.0 (OTP) in Stand-alone Mode (SpreadCycle)...............................357
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle)...358
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (SpreadCycle)..........................................................................................360
  The (latest release of) Marlin Setup for BIQU TMC2225 V1.0 (OTP) Drivers in Stand-alone Mode for SpreadCycle..364
BIQU TMC2225 V1.0 UART Mode.....................................................................................368
  Driver Chip Chart for BIQU TMC2225 V1.0 in UART Mode..........................................................368
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in UART Mode........................371
  The (latest release of) Marlin Setup for BIQU TMC2225 V1.0 Drivers in UART Mode...............................377
BIQU TMC2209 V1.2 (SA) Stand-alone Mode for StealthChop.........................................................386
  Driver Chip Chart for BIQU TMC2209 V1.2 (SA) in Stand-alone Mode (StealthChop)................................386
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop)...387
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (StealthChop)..........................................................................................389
  The (latest release of) Marlin Setup for BIQU TMC2209 V1.2 (SA) Drivers in Stand-alone Mode for StealthChop...393
BIQU TMC2209 V1.2 (OTP) Stand-alone Mode for SpreadCycle........................................................397
  Driver Chip Chart for BIQU TMC2209 V1.2 (OTP) in Stand-alone Mode (SpreadCycle)...............................397
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle)...398
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (SpreadCycle)..........................................................................................400
  The (latest release of) Marlin Setup for BIQU TMC2209 V1.2 (OTP) Drivers in Stand-alone Mode for SpreadCycle..404
BIQU TMC2209 V1.2 UART Mode.....................................................................................408
  Driver Chip Chart for BIQU TMC2209 V1.2 in UART Mode..........................................................408
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in UART Mode........................411
  Information on Sensor-less Homing for GTR V1.0................................................................415
  The (latest release of) Marlin Setup for BIQU TMC2209 V1.2 Drivers in UART Mode...............................420
BIQU TMC2226 V1.0 (SA) Stand-alone Mode for StealthChop.........................................................434
  Driver Chip Chart for BIQU TMC2226 V1.0 (SA) in Stand-alone Mode (StealthChop)................................434
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop)...435
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
    Mode (StealthChop)..........................................................................................437
  The (latest release of) Marlin Setup for BIQU TMC2226 V1.0 (SA) Drivers in Stand-alone Mode for StealthChop...441
BIQU TMC2226 V1.0 (OTP) Stand-alone Mode for SpreadCycle........................................................445
  Driver Chip Chart for BIQU TMC2226 V1.0 (OTP) in Stand-alone Mode (SpreadCycle)...............................445
  GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle)...446
  GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone
    Mode (SpreadCycle)..........................................................................................448
  The (latest release of) Marlin Setup for BIQU TMC2226 V1.0 (OTP) Drivers in Stand-alone Mode for SpreadCycle..452
BIQU TMC2226 V1.0 UART Mode.....................................................................................456
  Driver Chip Chart for BIQU TMC2226 V1.0 in UART Mode..........................................................456
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in UART Mode........................459
  Information on Sensor-less Homing for GTR V1.0................................................................463
  The (latest release of) Marlin Setup for BIQU TMC2226 V1.0 Drivers in UART Mode...............................468
BIQU TMC5160 V1.2 SPI Mode......................................................................................482
  Driver Chip Chart for BIQU TMC5160 V1.2 in SPI Mode...........................................................482
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in SPI Mode.........................485
  Information on Sensor-less Homing for GTR V1.0................................................................488
  The (latest release of) Marlin Setup for BIQU TMC5160 V1.2 Drivers in SPI Mode................................493
BIQU TMC5161 V1.0 SPI Mode......................................................................................507
  Driver Chip Chart for BIQU TMC5161 V1.0 in SPI Mode...........................................................507
  GTR V1.0 LEGEND of Driver Socket Representation for Stepper Motor Drivers in SPI Mode.........................510
  Information on Sensor-less Homing for GTR V1.0................................................................513
  The (latest release of) Marlin Setup for BIQU TMC5161 V1.0 Drivers in SPI Mode................................518
APPENDIX A......................................................................................................532
  How to adjust the Vref on a Stepper Motor Driver board using the Potentiometer................................532
    How to Tune Stepper Motor Drivers?..........................................................................532
APPENDIX B......................................................................................................534
  For the TMC drivers what’s the difference between stand-alone mode and (“UART” or “SPI “) modes?..............534
  How to Calculate Vref for Non-TMC Stepper Motor Divers........................................................534
  How to Calculate Vref for TMC Stepper Motor Drivers...........................................................535
    Driving Current Calculation Formulas for TMC Stepper Motor Drivers¹.........................................536
      #1 TMC2100 with Rs = 0.110Ω (110mΩ).......................................................................536
      #2 TMC2130 with Rs = 0.110Ω (110mΩ) for Stand-alone Mode and SPI Mode.....................................536
      #3 TMC2208 with Rs = 0.110Ω (110mΩ) for Stand-alone Mode..................................................537
      #4 TMC2208 with Rs = 0.110Ω (110mΩ) for UART Mode.........................................................537
      #5 TMC2209 with Rs =0.110Ω (110mΩ) for Stand-alone Mode...................................................538
      #6 TMC2209 with Rs = 0.110Ω (110mΩ) for UART Mode.........................................................538
      #7 TMC2225 with Rs = 0.150Ω (150mΩ) for Stand-alone Mode..................................................539
      #8 TMC2225 with Rs = 0.150Ω (150mΩ) for UART Mode.........................................................539
      #9 TMC2226 with Rs = 0.150Ω (150mΩ) for Stand-alone Mode..................................................540
      #10 TMC2226 with Rs = 0.150Ω (150mΩ) for UART Mode........................................................540
      #11 TMC5160 with Rs = 0.075Ω (75mΩ) for SPI Mode..........................................................541
      #12 TMC5161 with Rs = 0.062Ω (62mΩ) for SPI Mode..........................................................541
APPENDIX C......................................................................................................542
  The (Latest Release of) Marlin Setup That Is Common to ALL Stepper Motor Drivers..............................542
    Link to BIGTREETECH GTR-V1.0 Operating Instruction..........................................................542
    Link to BIGTREETECH GTR-V1.0 Github Page....................................................................542
    Link to Pronterface Software................................................................................543
    Link to How to Calibrate your 3D Printer....................................................................543
    GTR V1.0 Color PIN Diagram..................................................................................560
    GTR V1.0 Color Wiring Diagram...............................................................................561
    GTR V1.0 Color PIN 1 Diagram................................................................................563
    GTR V1.0 Color Schematic Diagram............................................................................564
    GTR V1.0 Uncolored Schematic Diagram........................................................................565
APPENDIX D......................................................................................................566
  Legends for GTR V1.0 Stepper Driver Jumper Configurations.....................................................566
  GTR V1.0 LEGEND COMMON to ALL Driver Socket Representation....................................................567
  GTR V1.0 LEGENDS for Driver Socket Representations and LEGENDS for Driver Chip Charts.........................571
    GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Have
      RST&SLP Set...............................................................................................571
    GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Have RST&SLP PINS Set...........574
      Special Consideration of “D” Jumper (RST&SLP) for GTR V1.0 Board..........................................575
    GTR V1.0 LEGEND of Driver Socket Representation for Binary State Stepper Motor Drivers Which Do Not Have 
      RST&SLP Set...............................................................................................576
    GTR V1.0 LEGEND of Driver Chip Chart for Binary State Stepper Drivers Which Do Not Have RST&SLP PINS Set....579
    GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
      Mode (StealthChop)........................................................................................580
    GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (StealthChop).582
    GTR V1.0 LEGEND of Driver Socket Representation for TMC Binary State Stepper Motor Drivers in Stand-alone 
      Mode (SpreadCycle)........................................................................................583
    GTR V1.0 LEGEND of Driver Chip Chart for TMC Binary State Stepper Drivers in Stand-alone Mode (SpreadCycle).585
    GTR V1.0 LEGEND of Driver Socket Representation for Tri State Stepper Motor Drivers.........................586
    GTR V1.0 LEGEND of Driver Chip Chart for Tri State Stepper Drivers..........................................588
    GTR V1.0 LEGEND of Driver Socket Representation for SPI Capable Stepper Motor Drivers.......................589
    GTR V1.0 LEGEND of Driver Socket Representation for UART Capable Stepper Motor Drivers......................596
    GTR V1.0 LEGEND of Driver Socket Representation for Sensor-less Homing Capable Stepper Motor Drivers........605
  GTR V1.0 Examples of Stepper Driver Jumper Configurations.....................................................611
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for Binary State Drivers without RST&SLP Set......611
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for Binary State Drivers with RST&SLP Set.........615
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for Tri State Drivers.............................619
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for TMC2209 with Sensor-less Homing...............626
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for TMC2209 without Sensor-less Homing............627
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for TMC2130 with Sensor-less Homing...............628
    GTR V1.0 Examples of Stepper Driver Jumper Configurations for TMC2130 without Sensor-less Homing............629
APPENDIX E......................................................................................................630
  Location Of “firmware.bin” File from the Marlin Compilation for GTR V1.0 Board................................630
APPENDIX F......................................................................................................633
  Links to Reference Material...................................................................................633
    Marlin Firmware Documentation...............................................................................633
    Information on Stepper Motor Drivers and Micro-stepping.....................................................633
    POLOLU A4988 and BIQU A4988.................................................................................634
    DRV8825.....................................................................................................634
    BIQU LV8729, FYSETC LV8729, LERDGE LV8729, and MKS LV879....................................................635
    BIQU LV8729.................................................................................................635
    FYSETC LV8729...............................................................................................636
    LERDGE LV8729...............................................................................................636
    MKS LV8729..................................................................................................637
    FYSETC S6128 V1.1...........................................................................................637
    FYSETC ST820................................................................................................638
    BIQU ST820..................................................................................................638
    POLOLU ST820 (STSPIN820)....................................................................................639
    POLOLU MP6500...............................................................................................639
    POLOLU TB67S249FTG..........................................................................................640
    BIQU S109 and FYSETC S109...................................................................................640
    BIQU S109...................................................................................................641
    FYSETC S109.................................................................................................641
    Marlin Firmware Documentation Specific to TMC Drivers.......................................................642
    Information Common to All TMC Drivers.......................................................................642
    BIQU TMC2100 and MKS TMC2100................................................................................643
    BIQU TMC2130................................................................................................644
    Information Common to BIQU TMC2208 V3.0 and FYSETC TMC2208 V1.2.............................................644
    Information Common to BIQU TMC2208 V3.0 and FYSETC TMC2208 V1.2 (Continued).................................645
    BIQU TMC2208 V3.0...........................................................................................645
    FYSETC TMC2208 V1.2.........................................................................................645
    Information Common to TMC2208 and BIQU TMC2225..............................................................646
    BIQU TMC2225 V1.0...........................................................................................646
    BIQU TMC2209 V1.2...........................................................................................647
    BIQU TMC5160 V1.2...........................................................................................647
    BIQU TMC5161 V1.0...........................................................................................648
    Links on SKR V1.4 TURBO Board...............................................................................648
    Links on SKR PRO V1.1 Board.................................................................................649
    Links on SKR PRO V1.2 Board.................................................................................650
    Links on SKR V1.3 Board.....................................................................................651
    Links on SKR V1.4 Board.....................................................................................652
    Links on GTR V1.0 Board.....................................................................................653
    Links on M5 V1.0 Add-on-board for GTR V1.0 Board............................................................654
    Miscellaneous Information...................................................................................655
    Miscellaneous Information (continued).......................................................................656
    Facebook Groups.............................................................................................661
APPENDIX G......................................................................................................663
  BIGTREETECH Reference Material for GTR V1.0 Board.............................................................663
    GTR V1.0 Original PIN Diagram...............................................................................663
    GTR V1.0 Original PIN Diagram - Corrected...................................................................664
    GTR V1.0 Original Wiring Diagram 1..........................................................................665
    GTR V1.0 Original PIN 1 Diagram.............................................................................666
    GTR V1.0 Original Schematic Diagram.........................................................................667
APPENDIX H......................................................................................................668
  BIGTREETECH’s Smart Filament Sensor (SFS) Guide for GTR V1.0 Board............................................668
  Information About BIGTREETECH’s SFS...........................................................................670
  SFS Wired to Extend-Interface-1 Connector.....................................................................672
    Marlin 2.0.x Setup for SFS Connected to Extend-Interface-1 Connector........................................673
  SFS Wired to E2 Limit Switch..................................................................................676
    Marlin 2.0.x Setup for SFS Connected to E2 Connector........................................................677
APPENDIX I......................................................................................................687
  “Connecting up Raspberry Pi via TFT Connector” Guide for GTR V1.0 Board.......................................687
  Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable Via TFT Connector..................................688
    TFT Connector Wiring Diagram for Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable.................691
  Marlin 2.0.x Setup for Connecting up Raspberry Pi.............................................................694
APPENDIX J......................................................................................................697
  “Connecting up Raspberry Pi via Raspberry Pi Header” Guide for GTR V1.0 Board.................................697
  Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable Via Raspberry Pi Connector.........................698
    Pi Connector Wiring Diagram for Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable..................701
  Marlin 2.0.x Setup for Connecting up Raspberry Pi.............................................................704
APPENDIX K......................................................................................................707
  “Connecting up Raspberry Pi via WIFI Header” Guide for GTR V1.0 Board.........................................707
  Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable Via WIFI Header....................................708
    WIFI Header Wiring Diagram for Connecting GTR V1.0 to Raspberry Pi to Eliminate USB Cable...................711
  Marlin 2.0.x Setup for Connecting up Raspberry Pi.............................................................714
APPENDIX L......................................................................................................717
  BLTouch Guide for GTR V1.0 Board..............................................................................717
  Connecting GTR V1.0 with BLTouch..............................................................................718
    Wiring Diagram for Connecting GTR V1.0 with BLTouch.........................................................721
  Marlin 2.0.x Firmware Setup for Connecting a BLTouch to GTR V1.0 Board........................................722
    Explanation when to use Marlin variable Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN..................................727
    Understanding Marlin Firmware’s NOZZLE_TO_PROBE_OFFSET Setting..............................................731
APPENDIX M......................................................................................................746
  PT100 Sensor Connection Guide to the GTR V1.0 Board via Analog ADC I/O Input..................................746
  Hyperlink Map for this PT100 Sensor Connection Guide via Analog ADC I/O Input.................................747
  Connecting  GTR V1.0 with  PT100 Sensor.......................................................................748
  E3D PT100 Amplifier Board Specifications......................................................................748
    E3D’s PT100 Amplifier Board -- Schematic Diagram............................................................749
    Hyperlink to Texas Instruments’ INA826  Amplifier Data Sheet................................................749
  Analog Procedure..............................................................................................752
    Connecting GTR V1.0 Board with PT100 Amplifier Board and PT100 Sensor.......................................752
      Locations of 3.3VDC Referenced to Analog Ground for the GTR V1.0 Board’s Thermistor Ports.................763
      Hardware Hack Instructions for the GTR V1.0 Board’s T0 (E0) Thermistor Port...............................765
      Hardware Hack Instructions for the GTR V1.0 Board’s T1 (E1) Thermistor Port...............................767
      Hardware Hack Instructions for the GTR V1.0 Board’s T2 (E2) Thermistor Port...............................769
    Instructions for Supplying Power to the PT100 Amplifier Board...............................................772
      Method #1 (5 VDC Digital PWR) for Powering the PT100 Amplifier Board for Techniques #1,  
        Technique #2, and Technique #8..........................................................................773
      Method #1 (3.3 VDC Digital PWR) for Powering the PT100 Amplifier Board for Techniques #3,
        and Technique #4........................................................................................774
      Method #1 (5 VDC Digital PWR) for Powering the PT100 Amplifier Board for Techniques #9,  
        Technique #10, and Technique #11........................................................................775
      Method #1 (3.3 VDC Digital PWR) for Powering the PT100 Amplifier Board for Techniques #5,  
        Technique #6, and Technique #7..........................................................................776
      Method #2 (3.3 VDC ref GNDAO, Analog PWR) for Powering PT100 Amplifier Board for Technique #5, 
        Technique #6, and Technique #7..........................................................................777
    Wiring Diagram for Technique #1 & Method #1 (5 VDC Digital PWR).............................................778
    Wiring Diagram for Technique #2 & Method #1 (5 VDC Digital PWR).............................................779
    Wiring Diagram for Technique #3 & Method #1 (3.3 VDC Digital PWR)...........................................780
    Wiring Diagram for Technique #4 & Method #1 (3.3 VDC Digital PWR)R).........................................781
    Wiring Diagram for Technique #5 & Method #1 (3.3 VDC Digital PWR)...........................................782
    Wiring Diagram for Technique #5 & Method #2 (3.3 VDC ref GNDAO, Analog PWR).................................783
    Wiring Diagram for Technique #6 & Method #1 (3.3 VDC Digital PWR)...........................................784
    Wiring Diagram for Technique #6 & Method #2 (3.3 VDC ref GNDAO, Analog PWR).................................785
    Wiring Diagram for Technique #7 & Method #1 (3.3 VDC Digital PWR)...........................................786
    Wiring Diagram for Technique #7 & Method #2 (3.3 VDC ref GNDAO, Analog PWR).................................787
    Wiring Diagram for Technique #8 & Method #1 (5 VDC Digital PWR).............................................787
    Wiring Diagram for Technique #9 & Method #1 (5 VDC Digital PWR).............................................789
    Wiring Diagram for Technique #10 & Method #1 (5 VDC Digital PWR)............................................790
    Wiring Diagram for Technique #11 & Method #1 (5 VDC Digital PWR)............................................791
      Marlin 2.0.x Firmware Setup for Connecting a PT100 Sensor to the GTR V1.0 Board...........................792
      Marlin 2.0.x Firmware Setup for Technique #1..............................................................793
      Marlin 2.0.x Firmware Setup for Technique #2..............................................................800
      Marlin 2.0.x Firmware Setup for Technique #3..............................................................807
      Marlin 2.0.x Firmware Setup for Technique #4..............................................................814
      Marlin 2.0.x Firmware Setup for Technique #5..............................................................821
      Marlin 2.0.x Firmware Setup for Technique #6..............................................................828
      Marlin 2.0.x Firmware Setup for Technique #7..............................................................835
      Marlin 2.0.x Firmware Setup for Technique #8..............................................................842
      Marlin 2.0.x Firmware Setup for Technique #9..............................................................854
      Marlin 2.0.x Firmware Setup for Technique #10.............................................................861
      Marlin 2.0.x Firmware Setup for Technique #11.............................................................868
APPENDIX N......................................................................................................875
  PT100 Sensor Connection Guide to the GTR V1.0 Board via Software SPI Protocol.................................875
  Hyperlink Map for this PT100 Sensor Connection Guide via Software SPI Protocol................................876
  Digital Procedure.............................................................................................877
    Connecting  GTR V1.0 with Adafruit MAX31865 Amplifier Board and PT100 Sensor................................877
    Adafruit MAX31865 Amplifier Board Specification.............................................................878
      Adafruit MAX31865 Amplifier Board -- Schematic Diagram....................................................879
      Hyperlink to MAXIM Integrated’s MAX31865 Data Sheet.......................................................879
    Connecting GTR V1.0 with Adafruit MAX31865 Amplifier Board via Software SPI.................................881
      Method #1 (5 VDC Digital PWR) for Powering the MAX31865 Amplifier Board for Technique #1 
        and Technique #2........................................................................................890
      Method #1 (3.3 VDC Digital PWR) for Powering the MAX31865 Amplifier Board for Technique #3 
        and Technique #4........................................................................................891
      Wiring Diagram for Technique #1 & Method #1 (5 VDC Digital PWR)...........................................892
      Wiring Diagram for Technique #2 & Method #1 (5 VDC Digital PWR)...........................................893
      Wiring Diagram for Technique #3 & Method #1 (3.3 VDC Digital PWR).........................................894
      Wiring Diagram for Technique #4 & Method #1 (3.3 VDC Digital PWR).........................................895
      Marlin 2.0.x Firmware Setup for Technique #1..............................................................897
      Marlin 2.0.x Firmware Setup for Technique #2..............................................................910
      Marlin 2.0.x Firmware Setup for Technique #3..............................................................923
      Marlin 2.0.x Firmware Setup for Technique #4..............................................................936
APPENDIX O......................................................................................................949
  PT100 Sensor Connection Guide to the GTR V1.0 Board via Hardware SPI Protocol.................................949
  Hyperlink Map for this PT100 Sensor Connection Guide via Hardware SPI Protocol................................950
  Digital Procedure.............................................................................................951
    Connecting  GTR V1.0 with Adafruit MAX31865 Amplifier Board and PT100 Sensor................................951
    Adafruit MAX31865 Amplifier Board Specification.............................................................952
      Adafruit MAX31865 Amplifier Board -- Schematic Diagram....................................................953
      Hyperlink to MAXIM Integrated’s MAX31865 Data Sheet.......................................................953
    Connecting  GTR V1.0 with Adafruit MAX31865 Amplifier Board via Hardware SPI................................953
      Method #1 (5 VDC Digital PWR) for Powering the MAX31865 Amplifier Board for Technique #1 
        and Technique #2........................................................................................965
      Method #1 (3.3 VDC Digital PWR) for Powering the MAX31865 Amplifier Board for Technique #3 
        and Technique #4........................................................................................966
      Wiring Diagram for Technique #1 & Method #1 (5 VDC Digital PWR)...........................................967
      Wiring Diagram for Technique #2 & Method #1 (5 VDC Digital PWR)...........................................968
      Wiring Diagram for Technique #3 & Method #1 (3.3 VDC Digital PWR).........................................969
      Wiring Diagram for Technique #4 & Method #1 (3.3 VDC Digital PWR).........................................970
      Marlin 2.0.x Firmware Setup for Technique #1..............................................................972
      Marlin 2.0.x Firmware Setup for Technique #2..............................................................985
      Marlin 2.0.x Firmware Setup for Technique #3..............................................................998
      Marlin 2.0.x Firmware Setup for Technique #4.............................................................1011
APPENDIX P.....................................................................................................1024
  1st & 2nd K-Type Thermocouple Sensor Connection Guide to the GTR V1.0 Board via Analog ADC I/O Input.........1024
  Hyperlink Map for this K-Type Thermocouple Sensor Connection Guide via Analog ADC I/O Input..................1025
  Connecting  GTR V1.0 with K-Type Thermocouple Sensor.........................................................1026
  Adafruit AD8495 Amplifier Board Specifications...............................................................1026
    Adafruit’s AD8495 Amplifier Board -- Schematic Diagram.....................................................1027
    Hyperlink to Analog Devices’ AD8495 Amplifier Data Sheet...................................................1027
    How To Prevent a Noisy K-Type Thermocouple.................................................................1028
  Connecting GTR V1.0 with One (1) or Two (2) K-Type Thermocouple Sensor.......................................1030
    Hook Up One (1) K-Type thermocouple to the GTR V1.0 board: #1, #2, and #3..................................1031
    Hook Up Two (2) K-Type thermocouple to the GTR V1.0 board: #4, and #5......................................1031
    Hook Up Two (2) K-Type thermocouple to the GTR V1.0 board: #5 (continued), and #6..........................1032
    Hook Up Two (2) K-Type thermocouple to the GTR V1.0 board: #6 (continued), #7, and #8......................1033
    Hook Up Two (2) K-Type thermocouple to the GTR V1.0 board: #8 (continued)..................................1033
  Analog Procedure.............................................................................................1037
    Connecting GTR V1.0 with K-Type Thermocouple Sensor and Adafruit’s AD8495 Amplifier Board..................1037
      Locations of 3.3VDC Referenced to Analog Ground for the GTR V1.0 Board’s Thermistor Ports................1048
      Hardware Hack Instructions for the GTR V1.0 Board’s T0 (E0) Thermistor Port..............................1050
      Hardware Hack Instructions for the GTR V1.0 Board’s T1 (E1) Thermistor Port..............................1052
      Hardware Hack Instructions for the GTR V1.0 Board’s T2 (E2) Thermistor Port..............................1054
    Instructions for Supplying Power to the AD8495 Amplifier Board.............................................1057
      Method #1 (5 VDC Digital PWR) for Powering the AD8495 Amplifier Board for Techniques #1,  
        Technique #2, and Technique #8.........................................................................1058
      Method #1 (3.3 VDC Digital PWR) for Powering the AD8495 Amplifier Board for Techniques #3,  
        and Technique #4.......................................................................................1059
      Method #1 (5 VDC Digital PWR) for Powering the AD8495 Amplifier Board for Techniques #9,  
        Technique #10, and Technique #11.......................................................................1060
      Method #1 (3.3 VDC Digital PWR) for Powering the AD8495 Amplifier Board for Techniques #5,  
        Technique #6, and Technique #7.........................................................................1061
      Method #2 (3.3 VDC ref GNDAO, Analog PWR) for Powering AD8495 Amplifier Board for Technique #5, 
        Technique #6, and Technique #7.........................................................................1062
    Wiring Diagram for Technique #1 & Method #1 (5 VDC Digital PWR)............................................1063
    Wiring Diagram for Technique #2 & Method #1 (5 VDC Digital PWR)............................................1064
    Wiring Diagram for Technique #3 & Method #1 (3.3 VDC Digital PWR)..........................................1065
    Wiring Diagram for Technique #4 & Method #1 (3.3 VDC Digital PWR)R)........................................1066
    Wiring Diagram for Technique #5 & Method #1 (3.3 VDC Digital PWR)..........................................1067
    Wiring Diagram for Technique #5 & Method #2 (3.3 VDC ref GNDAO, Analog PWR)................................1068
    Wiring Diagram for Technique #6 & Method #1 (3.3 VDC Digital PWR)..........................................1069
    Wiring Diagram for Technique #6 & Method #2 (3.3 VDC ref GNDAO, Analog PWR)................................1070
    Wiring Diagram for Technique #7 & Method #1 (3.3 VDC Digital PWR)..........................................1071
    Wiring Diagram for Technique #7 & Method #2 (3.3 VDC ref GNDAO, Analog PWR)................................1072
    Wiring Diagram for Technique #8 & Method #1 (3.3 VDC Digital PWR)..........................................1073
    Wiring Diagram for Technique #9 & Method #1 (5 VDC Digital PWR)............................................1074
    Wiring Diagram for Technique #10 & Method #1 (5 VDC Digital PWR)...........................................1075
    Wiring Diagram for Technique #11 & Method #1 (5 VDC Digital PWR)...........................................1076
    Marlin 2.0.x Firmware Setup for Connecting a K-Type Thermocouple Sensor to the GTR V1.0 Board..............1077
      Marlin 2.0.x Firmware Setup for Technique #1.............................................................1078
      Marlin 2.0.x Firmware Setup for Technique #2.............................................................1086
      Marlin 2.0.x Firmware Setup for Technique #3.............................................................1094
      Marlin 2.0.x Firmware Setup for Technique #4.............................................................1102
      Marlin 2.0.x Firmware Setup for Technique #5.............................................................1110
      Marlin 2.0.x Firmware Setup for Technique #6.............................................................1118
      Marlin 2.0.x Firmware Setup for Technique #7.............................................................1126
      Marlin 2.0.x Firmware Setup for Technique #8.............................................................1134
      Marlin 2.0.x Firmware Setup for Technique #9.............................................................1149
      Marlin 2.0.x Firmware Setup for Technique #10............................................................1157
      Marlin 2.0.x Firmware Setup for Technique #11............................................................1165
APPENDIX Q.....................................................................................................1173
  1st & 2nd K-Type Thermocouple Sensor Connection Guide to the GTR V1.0 Board via Software SPI Protocol........1173
  Hyperlink Map for this K-Type Thermocouple Sensor Connection Guide via Software SPI Protocol.................1174
  Digital Procedure............................................................................................1175
    Connecting GTR V1.0 with 1st & 2nd Adafruit MAX31855 Amplifier Board and K-Type Thermocouple Sensor........1175
    MAX31855 Amplifier Board Specification.....................................................................1176
      Adafruit’s MAX31855 Amplifier Board -- Schematic Diagram.................................................1177
      Hyperlink to MAXIM’s MAX31855 Data Sheet.................................................................1177
      How To Prevent a Noisy K-Type Thermocouple...............................................................1178
    Using the Embedded MAX31855 Amplifier and a 2nd MAX31855 Amplifier with 2nd Thermocouple Sensor............1180
      Marlin 2.0.x Firmware Setup for one K-Type Thermocouple connected to KTEM................................1181
    Connecting GTR V1.0 with 2nd Adafruit MAX31855 Amplifier Board via Software SPI............................1193
      Method #1 (5 VDC Digital PWR) for Powering the MAX31855 Amplifier Board for 
        Technique #1 and Technique #2..........................................................................1200
      Method #1 (3.3 VDC Digital PWR) for Powering the MAX31855 Amplifier Board for 
        Technique #3 and Technique #4..........................................................................1201
      Wiring Diagram for Technique #1 & Method #1 (5 VDC Digital PWR)..........................................1202
      Wiring Diagram for Technique #2 & Method #1 (5 VDC Digital PWR)..........................................1203
      Wiring Diagram for Technique #3 & Method #1 (3.3 VDC Digital PWR)........................................1203
      Wiring Diagram for Technique #4 & Method #1 (3.3 VDC Digital PWR)........................................1205
      Marlin 2.0.x Firmware Setup for Technique #1.............................................................1207
      Marlin 2.0.x Firmware Setup for Technique #2.............................................................1220
      Marlin 2.0.x Firmware Setup for Technique #3.............................................................1233
      Marlin 2.0.x Firmware Setup for Technique #4.............................................................1246
APPENDIX R.....................................................................................................1259
  2nd K-Type Thermocouple Sensor Connection Guide to the GTR V1.0 Board via Hardware SPI Protocol..............1259
  Hyperlink Map for this K-Type Thermocouple Sensor Connection Guide via Hardware SPI Protocol.................1260
  Digital Procedure............................................................................................1261
    Connecting GTR V1.0 with MAX31855 Amplifier Board and 2nd K-Type Thermocouple Sensor.......................1261
    MAX31855 Amplifier Board Specification.....................................................................1262
      Adafruit’s MAX31855 Amplifier Board -- Schematic Diagram.................................................1263
      Hyperlink to MAXIM’s MAX31855 Data Sheet.................................................................1263
      How To Prevent a Noisy K-Type Thermocouple...............................................................1264
    Connecting GTR V1.0 with 2nd Adafruit MAX31855 Amplifier Board via Software SPI ONLY.......................1266
APPENDIX S.....................................................................................................1267
  EEPROM Guide for GTR V1.0 Board..............................................................................1267
    Link to TWhite101 Instructable Guide called “BigTreeTech SKR Pro V1.1 or V1.2; Adding a EEPROM”............1268
    Link to TWhite101 Instructable Guide called “Correcting the Issue With On-board EEPROM 
      for the BTT GTR V1.0”....................................................................................1269
Index..........................................................................................................1270
```
---

## Web Sites to Help ReCalibrate or Calibrate Your 3D Printer

## https://teachingtechyt.github.io/calibration.html?fbclid=IwAR2HwowLZs4jnP0RU1pVZ1TmMxYbvNhqFvoGKGzCXAyCB_HdcZDkemmTJhc#intro

## https://3dpc.nl/

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