Hello folks,

I need an expert help here.

I'm using Pixhawk 4 flight controller loaded with PX4 (1.10.0). Yesterday when I connected 3DR 433MHz 500mW (bought a couple of months ago from sp4mm3r) telemetry with TELEM1 port of Pixhawk 4, QgroundControl showed "battery critically low, system shutdown" (I guess telemetry was consuming high power which FC wasn't able to sustain) even when battery was fully charged.

Today when I connected the telemetry again, Air and Ground modules don't communicate to each other anymore. They both have green and red LEDs blinking. Finally I updated the firmware on the ground module but can't do so on the air module because it doesn't have the MicroUSB slot which 3DR v2 version should have, so I suspect if it's v1 (however the package mentions v2 version).

A lot of online solutions talk about updating the firmware on both the ground and air modules. Since I don't have MicroUSB slot on air module, I can't do that. I guess another option is to use USB to UART converter (something like this: https://robu.in/product/ft232rl-usb-to-ttl-5v-3-3v-download-cable-to-serial-adapter-module-for-arduino/?gclid=CjwKCAjwqML6BRAHEiwAdquMnaCQQIuDhI_sjHIg8UdvqKRRN-mRUi3z3jZ-lpzQ-Vdonn2MMP1GThoC9sIQAvD_BwE), but I don't know whether that will work or not. Not to mention 2 weeks wait to get that converter delivered.

Did anyone face something like this.