UART port power supply

Hello, I have a problem with the power of my m2 card, when powered by the usb port it works normally, but I can’t get my pixhawk to recognize the tx rx information sent by the uart port.
in the manual informs that it can be powered between 3v to 5v, however through the uart port it only works above 6v, due to this I believe I am having problems with the data.
is the door damaged?

Hi Leandro,

Regarding the integration with the Pixhawk, could you please elaborate on what you’re trying to accomplish? Can you also provide more details about your setup and the Reach M2 powering?

These details will help me to understand what can be wrong here. Thanks.

Also, I’d like to recommend checking the Ardupilot integration guide for more details.