doing a quick calculation I get (255+9+163)&0xff=0xAB or 171 decimal
maybe worth printing HEX as well as decimal values
post the full code!
make sure your Serial monitor baudrate is faster than the Serial1 - I always use 115200
doing a quick calculation I get (255+9+163)&0xff=0xAB or 171 decimal
maybe worth printing HEX as well as decimal values
post the full code!
make sure your Serial monitor baudrate is faster than the Serial1 - I always use 115200