Communication with the MH-Z19B IR CO2 sensor for Node.js
let mhz19b = new MHZ19B('/dev/serial0');
The default UART port is '/dev/serial0'
Promise based
let mhz19b = new MHZ19B();
mhz19b.readCO2()
.then(data => {
console.log('CO2 reading', data);
})
.catch(err => {
console.log('error', err);
})
Event based
let mhz19b = new MHZ19B();
mhz19b.on('CO2', (data) => {
console.log(`${data.co2}`);
});
mhz19b.readCO2();
Calibrate sensor baseline - set current level to 400 (do outside)
let mhz19b = new MHZ19B();
mhz19b.calibrate();
Enable / Disable ABC mode (auto-recalibration to 400 ppm every 24 hours)
let mhz19b = new MHZ19B();
mhz19b.abcOn();
mhz19b.abcOff();
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