X9D 2019 non-SE: no telemetry in app but bluetooth connects

[avsaase]

Hi, thanks for making this app. I really hope to get with working with a X9D+ 2019 (non-SE) and Crossfire Nano Tx, connecting the bluetooth module to the s-port in the battery bay. I am able to connect the app via bluetooth, but the only telemetry that is shown is zero satellites. Since I am indoors I don't know if that is actual data or just a placeholder value. The logs created by the app are all 0 byte files.

What I have done/noticed so far:

• Before soldering I set the baud rate to 57600.
• I think I have wired everything up correctly: As you maybe noticed this bluetooth module looks slightly different from the one on the home page. A friend had this one laying around so I don't know the exact type. Could that be the problem?
• There is no voltage on the VCC pin in the battery bay. For this test I powered the module from a separate 5V supply, so I think that is not the problem though.
• I don't have a "mirror s-port" type option in the hardware menu of my Taranis (OpenTX 2.3.3). I do have a Bluetooth option, but I think this transmitter doesn't have an internal bluetooth module, so I left that disabled.

Maybe you can spot the problem?

EDIT: I have soldered up another module, also unidentified, but HC-06 was in the name of the bluetooth device so I think it is that. Same problem as before. I ran the bluetooth debug app but all that is in the log is "Connected as BL". Does that mean there is no telemetry output on my battery bay s-port?

[CrazyDude1994]

If logs are 0 size, it means it doesn't output any data.

[avsaase]

I just learned in https://github.com/opentx/opentx/issues/5357 that it is not possible to mirror crossfire telemetry to the Smartport in the battery bay of the 2019 X9D, only the UART in the old X9D. Bummer.