poor-mans-yun

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Arduino Yun functionality using a $20 WR703N router and a $3 Arduino Pro Mini.

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poor-mans-yun
=============
Arduino Yun functionality using a $20 WR703N router and a $3 Arduino Pro Mini.

This allows you to upload sketches to the Arduino Pro Mini over Ethernet or WLAN from the Arduino IDE, just like with the Arduino Yun.

![duino](https://cloud.githubusercontent.com/assets/2480569/3007599/9333e534-de92-11e3-8295-f1a7c1f282f3.jpg)

So far I did not attempt to port the Bridge, since it seems rather bloated to me.

Materials used
--------------
 * WR703N router (do NOT use WR702N) from eBay or Aliexpress, around $20 shipped
 * $3 Arduino Pro Mini from eBay, around $3 shipped
 
Soldering
--------------
 * Solder Arduino pin VCC to WR703N +3.3V
 * Solder Arduino pin GND to WR703N Ground
 * Solder Arduino pin RST to WR703N GPIO 29 signal = R17-South
 * Solder Arduino pin RX to WR703N TP_OUT signal = C55-West
 * Solder Arduino pin TX to WR703N TP_IN signal = R82-North
 
For information on the WR703N pins, see http://wiki.openwrt.org/toh/tp-link/tl-wr703n#gpios

Preparing Arduino IDE
---------------------
Edit boards.txt so that it contains the following line:
````
pro.upload.via_ssh=true
```

Preparing WR703N
----------------
Install OpenWrt on the WR703N. Set a ssh password. Then install the "announce" package and finally run the script from this repository on the WR703N.

How this works
--------------
The Arduino announces itself to the network using Zeroconf. The Arduino IDE sees this and uses ssh into the machine. There it runs /usr/bin/merge-sketch-with-bootloader.lua (this is a blank script in our case) and then it runs /usr/bin/run-avrdude (this is where the magic happens and where avrdude is invoked to flash the Arduino).

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