The signal voltage is not 3.3V on Serial 1 it’s just 3.3V tolerant. But anyway you are now connected to Telemetry 2 on Tx1/Rx1 +5 and Gnd and configured on Serial2? Both radios have the same firmware version? 2.0 presumably if you updated them.
It should work Jorge. I can’t think of reason why it wouldn’t. I’ll be using the Mini version of that board on a new build but I’ll just have a WiFi radio.
I confirmed that there is no general problem with a Sik radio working with these boards as expected. This was how it was connected. I have connected the Tele-Radio to UART7 Tx7,Rx7,5V,G ArduPilot Telem1
I was struggling to connect telemetry to Matek H743 Slim for couple of hours. And I have simple Rx TX connection without hardware control pins, which worked fine with Pix4. I managed to make it work by enabling “Swap” in Serial1 options (you have to reboot after that). And my wiring is correct Tx to Rx and Rx to Tx. It looks like either the programming or board silkscreen on PCB are incorrect.
Grateful friend! These workers seem to have quietly fixed Serial1 , but Serial2 is still the same software error …
I fought for almost 2 days … and if I hadn’t found accidentally your advice and the magical “Swap”, I probably would have thrown this trash in bin… it’s extremely sad