I have a Spektrum AR7700 receiver which apparently speaks SRXL over a serial bus at 115200. On another thread, aBUGSworstnightmare has commented that you can hook these up. I would love to ask directly about it, but I'm apparently too new to PM anyone .
It seems like this should be a fairly easy connect to the RPI3 UART given they are both at 3.3v levels. The issue is that there are only three wires on the receiver: VBus, Gnd, Signal (according to the Spektrum docs). The RPI3 has 3v3, Gnd, RX, TX. I assume this means that I need to combine the signals onto the one wire, but I don't know if there are any electronics involved to stop the uart from melting (or otherwise not working/failing/destroying something).
I have seen somewhere (can't find it right now) a simple circuit with a couple of resisters and a diode that seemed like it might work. Can anyone comment or hopefully provide a definitive answer. I'd really like to get bi-directional comms here to send telemetry back to the receiver.
Any help appreciated.