Originally Posted by Giaco
i've posted in the 9x forums as well, but haven't got a response.
I am running the latest er9x-frsky-noht firmware on my turnigy, have the smartieparts board with the sparkfun rs232 adapter. Everything is wired up, i was able to flash the telemetry firmware, and can fly fine, i just am not getting any data through to the transmitter. my rxd is showing 0.08v, and txd is showing around 5v. the +5v and ground on the telemetry port are not connected. the signals are definitely getting to the smartieparts pins, but i can't check the main board with the radio on. Am i missing something? It seems that it is always something stupit or minute that i miss, but i am at a complete loss this time.... Thanks~
Do you see the receiver and transmitter signal strengths?
And you need to scale the inputs in the transmitter to get the right voltages based upon your receiver and battery sensor scaling.