Originally Posted by Seppos
Hi Oso M,
The pinout across the serial port is the same order as on the FTDI cables and 3DR radios. Their wiki has some nice pictures of a connection which is the same as the RFD900 across the serial port. http://code.google.com/p/ardupilot-mega/wiki/3DRadio
I will make a few good diagrams showing the connection to APM1/2 shortly.
Thanks. I think I've figured it out that far.
I have the two RFD900s powered up and am getting a solid green light. I assume that means the two radios are linked up.
When I jump the UART 0/2 pins from the APM to the RX/TX ins on the RFD (pins 7 & 9) I get a blinking red light, I assume this means I'm sending data.
On the RFD that is connected to my laptop I have a solid green light. and the data/activity light is blinking, but it is very very dim compared to the other modem connected to the APM.