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Tracer-RS485-Modbus-Blynk

★ 67 Open GitHub ↗

An arduino sketch to connect the EPSolar/EPEver Tracer A/B Series (RS-485 Modbus) to an ESP8266 and monitor using the Blynk mobile app.

// repository documentation

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This project is currently on hold while I wait for my Tracer to be repaired. I only had it 1 day, managed to get this sketch written, then when I was packing down, the terminal block broke and left an exposed ground wire stuck in it! So annoying... so I will pick this up in about a month.

# Tracer-RS485-Modbus-Blynk
An arduino sketch to connect the EPSolar/EPEver Tracer A/B Series (RS-485 Modbus) to an ESP8266 and monitor using the Blynk mobile app.

Feel free to make pull requests if you wish to help develop it.

There is also a support forum on the Blynk community forums: http://community.blynk.cc/t/epsolar-tracer-2210a-charge-controller-blynk-epic-solar-monitor/10596

## Hardware

* [EPSolar/EPEver Tracer A/B-Series](https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20170114172728&SearchText=tracer+mppt+rs485)

* [RS485 UART Module](https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20170114172807&SearchText=uart+rs485) (not the MAX485 chip!)

* [ESP8266 Dev Board](https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20170114172938&SearchText=esp8266+mini)

* An old ethernet cable with RJ45 connector you are happy to cut open

## Software

* [Blynk](http://www.blynk.cc/) Mobile App ([iOS](https://itunes.apple.com/us/app/blynk-iot-for-arduino-rpi/id808760481?mt=8) & [Android](https://play.google.com/store/apps/details?id=cc.blynk&hl=en))
* Arduino IDE 1.6.9+
* The project sketch

## Wiring

Cut open your ethernet cable and split out pin 3,5,7 (B,A,GND). Refer to [Tracer Modbus PDF](http://www.solar-elektro.cz/data/dokumenty/1733_modbus_protocol.pdf) for additional info.

Follow the wiring guide below: (note that the 2-pol switch is only needed during flashing)
![Tracer Wiring Diagram](http://i.imgur.com/OktbhPG.png)

## Setup

### Libraries

* Blynk Library
* ArduinoOTA
* SimpleTimer

### Tutorial

* Create wifi_credentials.h library.

Firstly, create a folder in your sketch/library folder call 'wifi_credentials'. Then create a new file call wifi_credentials.h and enter the following template. Change the details for your own wifi network.

You will be able to use this file by including it in any sketch by entering ```#include <wifi_credentials.h>```.

```cpp
/**************************************************************
 *           Settings - Wifi Credentials
 **************************************************************/
#define WIFI_SSID             "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
#define WIFI_PASS             "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

```

* Open the Blynk mobile app and create a new project by scanning the following QR code

![Project QR Code](http://i.imgur.com/xBEmJyJ.jpg)

* Send yourself the generated auth code
* Paste your auth code in to the settings.h file

```cpp
#define AUTH                  "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
```

* Disconnect the TX/RX cables (or open the switch if you have one)
* Upload the sketch to your ESP8266
* Once uploaded, reconnect the TX/RX cables and plug the cable in to the Tracer COM port 
* Load the Blynk project and hit the PLAY button to start receiving data

## Reference

[Tracer A/B Series Modbus Protocol](http://www.solar-elektro.cz/data/dokumenty/1733_modbus_protocol.pdf)

## Developing further

I plan to add more features and pull more data from the controller once I have my own solar system running.

If you'd like to pick this up and have a go at adding features, I'll be happy to accept pull requests.

## Credits

Thanks to subtafuge on [Reddit](https://www.reddit.com/r/esp8266/comments/59dt00/using_esp8266_to_connect_rs485_modbus_protocol/) for lending me his working Tracer RS485 code!

Tracer-RS485-Modbus-Blynk

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