It’ll work with the existing spektrum port however, pixhawk/ardupilot is unable to read the telemetry data via that port. Our plan was to hook it up via RCIN as a serial link. We’re not quite sure if this will work yet.
We’re able to get telemetry data down to the transmitter but we really want it within the ardupilot so it can be logged.
Sorry I wasn’t clear - this will work with the SRXL2 support that is already in master. Get a build of master from the link above, attach the RX to a serial port, select protocol 23 and half-duplex and you should be good to go. Telemetry works - I am using it with my SPM4650. SRXL2 will not work on the RCIN or SPKT ports - you need to use a serial port.
I don’t for the cube black I’m afraid. SRXL is a 3-wire protocol. GND-GND, +5v-+5V and SIGNAL-TX
It’s very important that you connect the signal wire to the TX on the serial port as the cube black is an F4 and you can’t switch RX and TX in software. The receiver should come with a pinout - one of the wires is n/c.
That firmware fix was actually for all variants, US also - it describes this later on in the thread. So I encourage you to check and upgrade if you are able - not saying it will fix this, but it’s something we must try.
How very interesting. We’re very perplexed by this issue. We have set the SERIAL1_OPTIONS to 8 but that corresponds to “swap”. We’ve tried both “HalfDuplex” and “Swap” to no avail. We also updated the 4651T to the latest firmware.
Is there anything else you can recommend that we check or toggle?
I am trying to use this same receiver on a Pixhawk 2.1 Blue Cube and can’t seem to get it to connect. I am using Firmware 4.0.5. I have the the signal wire connected to the TX pin on Serial1 and it configed to 23 for RCin and 4 for HalfDuplex.
Also what is your experience on range with this receiver? My RSSI Bars drop out at 1/4 mile. I feel I should get more range. Even though the bars drop out I still had control but I didn’t fly much further out of fear of losing connection.