...Erriez MH-Z19B and MH-Z19C CO2 sensor library for Arduino
The screenshot below displays the response timing of a synchronous readCO2() call which takes 22.1ms on an Arduino UNO: 9.4ms: Transmit 9 Bytes at 9600 baud 3.2ms: MH-Z19B to process command 9.3ms: Return response 9 Bytes at 9600 baud ...