homebridge-bme280

Bosch BME280 temperature/humidity/barometric pressure sensor service plugin for Homebridge.

• Display of temperature, humidity and Barometric Pressure from a BME280 connected to a RaspberryPI.
• Archives results every hour to a google spreadsheet
• Support the graphing feature of the Eve app for trends

Forked from homebridge-280 to use bme280, which has a full implementation of the BME280 options. See the datasheet for all oversampling and filtering options.

Installation

1. Install Homebridge using npm install -g homebridge
2. Install this plugin npm install -g @iainfarq/homebridge-bme280
3. Update your configuration file - see below for an example

Follow the excellent directions in the bme280 package to connect the device to the I2C bus.

Configuration

• accessory: "BME280"
• name: descriptive name
• name_temperature (optional): descriptive name for the temperature sensor
• name_humidity (optional): descriptive name for the humidity sensor
• refresh: Optional, time interval for refreshing data in seconds, defaults to 30 seconds.
• options: options for bme280. Note that the 'forcedMode' option is set to true by default; this should better match any homebridge use - self heating is reduced, and the sensor is only active once per refresh cycle.

If you get an I/O error, make sure the I2C address is correct (usually 0x76 or 0x77 depending on a jumper).

Simple Configuration

{
  "bridge": {
    "name": "BME280Example",
    "username": "CB:22:33:E2:CE:31",
    "port": 51826,
    "pin": "033-44-254"
  },
  "accessories": [
    {
      "accessory": "BME280",
      "name": "Sensor",
      "name_temperature": "Temperature",
      "name_humidity": "Humidity",
      "options": {
        "i2cBusNo": 1,
        "i2cAddress": "0x77"
      }
    }
  ],
  "platforms": []
}

More complex configuration, using all available bme280 options:

{
  "bridge": {
    "name": "BME280Example",
    "username": "CB:22:33:E2:CE:31",
    "port": 51826,
    "pin": "033-44-254"
  },
  "accessories": [
    {
      "accessory": "BME280",
      "name": "Sensor",
      "name_temperature": "Temperature",
      "name_humidity": "Humidity",
      "refresh": 15,
      "options": {
        "i2cBusNo": 1,
        "i2cAddress": "0x77",
        "humidityOversampling": "OVERSAMPLE.X8",
        "pressureOversampling": "OVERSAMPLE.X16",
        "temperatureOversampling": "OVERSAMPLE.X2",
        "filterCoefficient": "FILTER.F16",
        "standby": "STANDBY.MS_20",
        "forcedMode": false
      }
    }
  ],
  "platforms": []
}

This plugin creates two services: TemperatureSensor and HumiditySensor.

Credits

• NorthernMan54 - Barometric Pressure and Device Polling
• simont77 - History Service
• fivdi - Comprehensive implementation of the BME280 interface

License

MIT