Connect the TriGUIDE to the PC

In order to program the Arduino pro mini, you’ll need a serial connection to your PC.

There are quite cheap USB to RS232 converters available. These converters work with +-12V, therefore it is extremely important that you connect them to the correct connector (RS232 connection)! You can also use a Sparkfun FTDI USB to serial breakout board, in this case you have to connect it to the UART connection. For the mini version you have to use a FTDI USB to serial board.

If in any of the above mentioned cases the communication doesn’t work, try to turn the connectors 180 degrees first.