https://github.com/tomhumphries/mh-z19b

Communication with the MH-Z19B IR CO2 sensor for Node.js
https://github.com/tomhumphries/mh-z19b

co2 iot mh-z19 mh-z19b mhz19 mhz19b node nodejs sensor

Last synced: about 3 hours ago
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Communication with the MH-Z19B IR CO2 sensor for Node.js

• Host: GitHub
• URL: https://github.com/tomhumphries/mh-z19b
• Owner: TomHumphries
• Created: 2020-03-24T19:34:49.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-03-26T09:16:41.000Z (over 2 years ago)
• Last Synced: 2024-10-01T12:34:57.030Z (about 1 month ago)
• Topics: co2, iot, mh-z19, mh-z19b, mhz19, mhz19b, node, nodejs, sensor
• Language: JavaScript
• Size: 33.2 KB
• Stars: 6
• Watchers: 3
• Forks: 4
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
# MH-Z19B

Communication with the MH-Z19B IR CO2 sensor for Node.js

## Declare

```let mhz19b = new MHZ19B('/dev/serial0');```

The default UART port is _'/dev/serial0'_ 

## Commands

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();

```