SPM4651T with SRXL2

uneasy · February 28, 2021, 3:27pm

Ok so looks like, reboot with power plugged messes it up and it needs to power down completely and restart to pick up SRXL2 again

andyp1per · February 28, 2021, 3:58pm

So its worth bearing in mind that the SRXL2 RX’s are quite power hungry - so make sure you are powering from somewhere reasonable (e.g. allow 200mA). Also the handshake protocol is a little dicey, although that doesn’t sound like your problem

uneasy · February 28, 2021, 4:27pm

I kind of looks like, when I reboot with “button” in mission planner, it does not connect back to receiver

But when I do main power cycle without disconnecting usb

it comes back

currently I am using laboratory PSU as a power source so it has up to 5A, so that’s not a problem I thin.

andyp1per · February 28, 2021, 4:36pm

If you don’t cycle the power the RX won’t bootstrap - so that’s the problem

uneasy · February 28, 2021, 4:38pm

well there we go I guess that was my problem after all. I knew it’s something simple I was/ wasn’t doing.
Thank you for you patience

rcbthree · March 18, 2021, 4:36am

Andyp1per Thank you so much for the support. I spent this afternoon getting my receiver working… Ironically my settings were all correct… Wiring was good. But i didn’t have the latest firmware! Once I got the right firmware it all worked! (this is also my first post) I’m pumped to build a drone!

Ricmussman · May 28, 2021, 5:10pm

Has something changed in the Firmware? I can’t seem to get the Spektrum 4651T to communicate with the new Pixhawk Blue cubes. These are the ones with the orange architecture… Am I missing something? I have tried on both pins and tries several serial ports and nothing works…

HELP

andyp1per · May 28, 2021, 5:34pm

Please post your parameters and firmware version

Ricmussman · May 28, 2021, 6:29pm

Firmware is Arducopter 4.0.7

Serial_Baud = 115
Serial_Option = 4
Serial_Protocol = 23

I have use these receivers before and was successful in setting it up, but for some reason I am have troubles… I do know that the old Blue Cube use the Black Cube architecture, and the new Blue Cubes use the Orange architecture, not sure if that is messing things up or not. I’m stuck…

Ricmussman · May 28, 2021, 6:32pm

I have tried Telemetry 1, 2 GPS1, and the SBusO (Serial5) none of them would connect. I do get a solid light on my receiver so I am bound. I also have tried both (TX and RX) pins on the serial ports. Still no connection of the radio.

Ric

andyp1per · May 28, 2021, 6:41pm

Only supported in 4.1

Ricmussman · May 28, 2021, 7:44pm

Any idea when they will be regularly supported?

andyp1per · May 28, 2021, 9:21pm

4.1 is in beta at the moment

mroberts · October 16, 2021, 7:43am

I’m trying this in 4.1 Copter and was only able to get it to work if I forced SRXL2 with RC_PROTOCOL = 256.

Using an AR10100T

andyp1per · October 16, 2021, 7:51am

Interesting, it does not look like the kind of receiver that requires bootstrap, but forcing SRXL2 essentially makes sure this kind of bootstrap works so cannot hurt.

TheBreakingZone · January 20, 2022, 6:56pm

I’ve got Pixhawk 4 and am looking for how to wire the srxl2 are people soldering straight onto the receiver and Pixhawk or am I missing something?

andyp1per · January 20, 2022, 8:53pm

Need to be connected to a telemetry port / uart - so don’t use the RX or SPKT connector

TheBreakingZone · January 20, 2022, 9:15pm

But specifically how are people doing this? Soldering directly onto the receiver and pixhawk? Or is there some way of sourcing the connectors to make our own cables?