It is caused by Arduino Uno’s high baud error at 115200 baud. Just change baud setting of both sides to one of 9600, 19200 or 38400.
UART Communication Anomaly Between WisNode-LoRa and Arduino Uno
It is caused by Arduino Uno’s high baud error at 115200 baud. Just change baud setting of both sides to one of 9600, 19200 or 38400.