I use the Turnigy 9x as well, I simply connect channel 5 on the receiver to channel 7 on the APM, and assign the front dial (pitch-trim/aux2) for mode select on the transmitter to ch5, this leaves three availible channels (flap, hov pit, hov thr) for other things. (Menu, Settings, AUX-CH, Ch5 = Pit-Trim)
I also have set the "throttle-hold" to throttle cut switch @ -30% which engages RTH failsafe on the APM.
As well as since the Receiver sends out 900 on both ch3 (throttle) and ch5 (ch7 on APM) when I power off of transmitter , APM detects the failsafe too.
Also this keeps the annoying switch error on power up as it doesnt care of dial settings. first notch full-clockwise is hw manual, next notch counter-clockwise is software manual, then next two notches are FBW, then the next two are AUTO.
I have also set them to HW Manual, Stabilize, FBW-A, FBW-B, Loiter, Auto. but leave it now as above as the nob doesnt have detents (yet) ...
One other helpful tidbit, if you do use the dial... fill in the tiny line on the top of each dial with white paint, so its easier to see where the dial is set at.
Well with the new FW for TH9x or Eurgle 9x you can program any channel to do any function, switches, pots, or gimbals ! There are no firm presets.
The FW also lets the TX do up to 30 channels ! You of coarse must have an RX of XX number of channels to do that. So if you need more channels, just program the radio for whatever number your RX is.
For being a $60 TX, the new FW makes it FLY ! (Har-har)
BTW, it programs with a $15 Sparkfun ISP.
Easy to solder 6 wires internally in the radio.
Brett, it's for reprogramming whole Turnigy/EMAX/Eurgle radio. Reason to use this radio is that it's rather good quality and nice looking but best thing is that is has ATMegaXXX chip inside so we can hack it and make it even Arduino compatible. There are many opensource replacement firmwares for this radio and for that you need to have ISP programmer.
You just need to solder 6 wires to it so you can connect your programmer and re-flash it. If you don't plan to hack it then you don't need programmer, just use it's normal firmware and it's still nice radio..
With being able to reprogram the Th9x, would it be possible to upload/download data from the TX and plane via XBee's and have the data displayed on the TX display?
The TX has an ATMega64 in it.(NOT atmega40 as I stated above)
The RXI and TXO pins on the TX are brought out by the ISP programming plug.
The GCS (ground control station) data sent by the plane via XBee and recieved by an XBee on the ground, and the data sent to the TX display via the RX0 TX0.
The display could show Lat,Long,Alt,Amps,Pitch,Roll,etc and even with a graph show attitude of plane.
Any ideas ?