Light Weight Telemetry - no data

1

Hi. Black Cube on a mini carrier board. Firmware Plane 4.0.9 official.

Trying to use Telemetry2 for Light Weight Telemetry output. So that’s Serial2 - set to 9600 baud (have also tried 1200, 2400), and protocol to 25.

Analyzing the second pin (the pin beside VCC) - which should be Serial2 Tx - and I see nothing.

I have used Light Weight Telemetry on other boards (eg OmniBus F4) no issue.

Any ideas? Thank you!

2

Have you set the Serial2_protocol correctly?

3

Hi Alvin

Yes - not much to set up really - I happen to use the LTM data at a baud rate of 9600, so that is set to 9, and the protocol is 25 (LTM). This is on Serial2 = Telemetry2, and there is no data coming out the transmit pin (the pin beside VCC on this connector).

I am using LTM on an OmniBus F4 board, and it works fine…

4

Can you try if it works on telem1 port?

5

Hi Alvin

I have tried LTM on Telemetry1 (serial1), Telemetry2 (serial2), and GPS2 (serial4).

I can run for example MavLink on Telemetry1 no issue. Just not LTM.

It simply seems LTM is not working on the Cube?

BTW, I am aware only the first instance of LTM is active, so I have been careful to only ever have one instance of protocol 25 (LTM) selected.

Any other ideas appreciated. Is this something you could quickly test?

6

Ok, although protocol 25 (LTM) is listed and selectable, apparently it is not included in the 4.0.x firmware releases for the Cube.

I loaded 4.1.0 dev from today, and it is working.

Thanks for your help