homebridge-dht-mqttpub

Integrate DHT sensor into homebridge and publish sensor data via mqtt

Installation

tbd

Configuration - with RPI cpu temperature sensor, requires cputemp program ( Optional )

{
  "bridge": {
    "name": "MyHomebridge",
    "username": "CC:22:3D:E3:CD:33",
    "port": 51826,
    "pin": "031-45-154"
  },
  "description": "HomeBridge DHT22",

  "platforms": [
  ],
  "accessories": [
    {
      "accessory": "Dht",
      "name": "CPU Temperature",
      "service": "Temperature",
      "refresh": "15"
    }, {
      "accessory": "Dht",
      "name": "dht22",
      "name_temperature": "Temperature",
      "name_humidity": "Humidity",
      "service": "dht22",
      "gpio": "4",
      "refresh": "15"
    }
  ]
}

Configuration - without cputemp

{
  "bridge": {
    "name": "MyHomebridge",
    "username": "CC:22:3D:E3:CD:33",
    "port": 51826,
    "pin": "031-45-154"
  },
  "description": "HomeBridge DHT22",

  "platforms": [
  ],
  "accessories": [
    {
      "accessory": "Dht",
      "name": "dht22",
      "name_temperature": "Temperature",
      "name_humidity": "Humidity",
      "service": "dht22",
      "gpio": "4",
      "refresh": "15"
    }
  ]
}

or with multiple DHT22's

{
  "accessory":          "Dht",
  "name":               "dht22 - indoor",
  "name_temperature":   "Indoor Temperature",
  "name_humidity":      "Indoor Humdity",
  "gpio":               "4",
  "service":            "dht22",
  "refresh":            "60"
},
{
  "accessory":          "Dht",
  "name":               "dht22 - outdoor",
  "name_temperature":   "Outdoor Temperature",
  "name_humidity":      "Outdoor Humdity",
  "gpio":               "2",
  "service":            "dht22",
  "refresh":            "30"
}

Configuration Options

Optional parameters includes

Config Item	Description
dhtExec	Full command including path to read dht22 sensor. Not needed unless dht22 is installed in a location not on the path. Defaults to dht22 ie "dhtExec": "/usr/local/bin/dht22"
cputemp	Full command including path to read cpu temp sensor. Not needed unless cputemp is installed in a location not on the path. Defaults to cputemp ie "cputemp": "/usr/local/bin/cputemp"
gpio	Gpio pin to read for dht22 sensor. Defaults to 4 ie "gpio": "4"
Refresh	Frequency of data refresh. Defaults to 1 minute
name	descriptive name
name_temperature (optional)	descriptive name for the temperature sensor
name_humidity (optional)	descriptive name for the humidity sensor

Optional cputemp script - install in /usr/local/bin

#!/bin/bash
cpuTemp0=$(cat /sys/class/thermal/thermal_zone0/temp)
cpuTemp1=$(($cpuTemp0/1000))
cpuTemp2=$(($cpuTemp0/100))
cpuTempM=$(($cpuTemp2 % $cpuTemp1))

echo $cpuTemp1" C"
#echo GPU $(/opt/vc/bin/vcgencmd measure_temp)

ToDo

• tbd

Credits

• name here