Serial Communication CH2O sensor

Projects Programming
2
  • pin 5 (RX) to arduino pin 12 (also tried the RX pin)
  • pin 6 (TX) to arduino pin 13 (also tried the TX pin)

Note this from the header file

#if SOFTWARE_SERIAL
#define __RX_PIN__          12
#define __TX_PIN__          13
#endif

But you are not using SoftwareSerial in your program