I'm trying to program a ardupilot module which has TX RX and ground lines. I trying to use a Uart bridge controller. I know it works because I programmed a GPS reciever using its TTL lines. Stumped with the software and don't know what to do. I'm also resetting the arduino before the code compiles to simulate a rts line. I'm really frustrated and need this project done. The software is spitting out the stupid avrdude sync fail. Please help me
do you have the reset pin connected as well? I'm not very familiar with UART bridge, but I noticed that you only mentioned the RX TX and ground pins. I would try connecting the reset pin as well and see if it syncs up then.