🌡 Homebridge LM75A plugin

A Temperature plugin for HomeBridge to read from an LM75A sensor.


Package:	https://www.npmjs.com/package/homebridge-lm75a
Code:	https://github.com/UXnomaan/homebridge-lm75a

Preparation

Enable I2C bus

By default I2C is not enabled on the raspberry pi. You can run raspi-config and selecting Interfacing Options, then P5 I2C. After it's enabled, reboot.

Connect sensor

Depending on your Pi board version, you need to find SCL and SDA, usually 3 (SDA) and 5 (SCL). Connect your sensor to the board.

Find sensor address

This library has the address hard-coded to 0x48 for now so you need to modify the board to use this plugin.

Install i2c-tools:

sudo apt-get install i2c-tools

Then run:

i2cdetect -y 1

The output will look like this:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Installation

Install homebridge sudo npm install -g --unsafe-perm homebridge
Install this plugin with npm install -g --unsafe-perm homebridge-lm75a
Update your config.json.

"accessories": [
    {
        "accessory": "lm75a",
        "name": "Temperature",
        "unit": "c",
        "frequency": "10",
        "debug": true
    }
]

Fields:

Accessory: must be "lm75a"
Name: can be anything
Unit: Temperature unit (c or f)
Frequency: Seconds between each reading
Debug: if set to true there will be logging for debugging purposes

Support

Please create issues on github.