co2-monitor

Reads CO2, temperature and humidity from TFA-Dostmann CO2-Monitor devices via USB.

Just connect the sensor via USB and run the example script. There is no need to set up the sensor or USB port.

Supported Hardware

TFA-Dostmann CO2-Monitor AIRCO2NTROL MINI 31.5006

TFA-Dostmann CO2-Monitor AIRCO2NTROL COACH 31.5009

Install

npm install co2-monitor

Example

const Co2Monitor = require('co2-monitor');

let co2Monitor = new Co2Monitor();

co2Monitor.on('connected', () => {
  console.log('Co2Monitor connected');
});

co2Monitor.on('disconnected', () => {
  console.log('Co2Monitor disconnected');
});

co2Monitor.on('error', (error) => {
  console.error(error);

  co2Monitor.disconnect(() => {
    process.exit(1);
  });
})

co2Monitor.on('co2', (co2) => {
  console.log('co2: ' + co2.toString());
})

co2Monitor.on('humidity', (humidity) => {
  console.log('humidity: ' + humidity.toString());
})

co2Monitor.on('temperature', (temperature) => {
  console.log('temperature: ' + temperature.toString());
})

co2Monitor.on('data', (data) => {
  console.log('data: ' + data.toString());
})

co2Monitor.connect((error) => {
  if (error) {
    console.error(error);
    process.exit(1);
  }

  co2Monitor.startTransfer((error) => {
    if (error) {
      console.error(error);
    }
  });
});

Events

Temperature

temperature event which is triggered on an update of temperature.

The event result is an object with the following structure:

{
  "value": 23.73,
  "type": "float",
  "unit": "degree celsius",
  "symbol": "°C"
}

Co2

co2 event which is triggered on an update of Co2.

The event result is an object with the following structure:

{
  "value": 1744,
  "type": "int",
  "unit": "parts per million",
  "symbol": "ppm"
}

Humidity

humidity event which is triggered on an update of relative humidity.

Only the AIRCO2NTROL COACH supports humidity data. The AIRCO2NTROL MINI will report humidity data with 0.

The event result is an object with the following structure:

{
  "value": 40.75,
  "type": "float",
  "unit": "relative humidity",
  "symbol": "% rh"
}

Data

data event which is triggered on updates of humidity, temperature or co2.

The event result is an object with the following structure:

{
  "co2": {
    "value": 1744,
    "type": "int",
    "unit": "parts per million",
    "symbol": "ppm"
  },
  "temperature": {
    "value": 23.73,
    "type": "float",
    "unit": "degree celsius",
    "symbol": "°C"
  },
  "humidity": {
    "value": 40.75,
    "type": "float",
    "unit": "relative humidity",
    "symbol": "% rh"
  }
}

Credits

based on code by henryk ploetz

License

MIT