Example command (if serial):
AT+VER
or
sysinfo
Sometimes a newer firmware introduces bugs (e.g., reduced transmit power, broken WPA3). Downgrading is possible but risky. Most manufacturers disable downgrades to prevent security regressions. hkm0126 firmware
To attempt a downgrade:
Warning: Updating firmware carries inherent risk. Power loss during the process can brick your device. Ensure your battery is >50% or use a stable power source. Example command (if serial): AT+VER
When plugging the module into a computer via USB or into a flight controller (like a Pixhawk or Cube), the system might fail to recognize the device. This can be a sign of corrupted firmware. or sysinfo