DWM1001-dev to Arduino/Teensy

I am using the DWM1001-dev to build a small device with some other sensors (gyroscopes etc…). I am using another microcontroller (Teensy 4.1) and I connect it to the dev board via UART (Unsoldered J15 to Teensy Rx & J14 to Tx). Everything works fine when the dev board is connected to the PC via USB But I get nothing when the board is powered by a 3.7 V Lipo battery… If you have any idea to correct this, please let me know :slight_smile: