MMM-DHT-Sensor

This a module for the MagicMirror.

This module gets data form DHT11, DHT22 and AM2302 sensors.

bcm2835

This module uses node-dht-sensor to get the sensor data, and this module depends on bcm2835 to do so, therefore you need to install it in your Pi in order to use this module.

cd ~
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.52.tar.gz
tar zxvf bcm2835-1.52.tar.gz
cd bcm2835-1.52
./configure
make
sudo make check
sudo make install

Installation

git clone https://github.com/ryck/MMM-DHT-Sensor.git
cd MMM-DHT-Sensor
npm install

Config

The entry in config.js can include the following options:

Option	Description
`sensorPin`	Required This is the GPIO pin the sensor is connected to. Note: This is not the hardware pin number. Type: `integer`
`sensorType`	Required This is the the sensor type. It should work for DHT11, DHT22 and AM2302 sensors Type: `integer` Possible values: `11` for DHT11 or `22` for DHT22 / AM2302
`units`	What units to use. Specified by config.js Type: `string` Possible values: config.units = Specified by config.js, `metric` = Celsius, `imperial` =Fahrenheit Default value: `config.units`
`updateInterval`	How often the sendor data is updated. Type: `integer` Default value: `1 hour`
`relativeScale`	Relative scale to choose the temparature icon. Type: `integer` Default value: `30`
`initialLoadDelay`	The initial delay before loading. If you have multiple modules that use the same API key, you might want to delay one of the requests. (Milliseconds) Type: `integer` Possible values: `1000` - `5000` Default value: `0`
`animationSpeed`	Speed of the update animation. (Milliseconds) Type: `integer` Possible values:`0` - `5000` Default value: `1000` (1 second)
`debug`	Show debug information. Possible values: `true` or `false` Default value: `false`

Here is an example of an entry in config.js

{
	module: "MMM-DHT-Sensor",
	position: "top_right",
	header: "Upstairs",
	config: {
		sensorPin: 2,
		sensorType: 22,
		updateInterval: 60 * 60 * 1000,
		initialLoadDelay: 0,
		animationSpeed: 1000,
		units: "metric",
		relativeScale: 35,
		debug: false
	}
},

Notes

A good resource to know the GPIO/Hardware pin number is (https://pinout.xyz/)

Notifications

This module implements the following notifications:

INDOOR_TEMPERATURE (int) Temperature in Celsius
INDOOR_HUMIDITY (int) Humidity in relative humidity (%)

Dependencies

bcm2835
node-dht-sensor (installed via npm install)

Issues

WARNING! Could not load config file. Starting with default configuration. Error found: Error: The module '/home/pi/MagicMirror/modules/MMM-DHT-Sensor/node_modules/node-dht-sensor/build/Release/node_dht_sensor.node'
was compiled against a different Node.js version using
NODE_MODULE_VERSION 48. This version of Node.js requires
NODE_MODULE_VERSION 53. Please try re-compiling or re-installing
the module (for instance, using `npm rebuild` or`npm install`).

If you get this error after installing the module (or your MagicMirror is just a black screen) try this:

cd MMM-DHT-Sensor
npm run rebuild

Thanks To...

Cato Antonsen for the MMM-Temperature-Humidity module, which I used as reference.
Nick Wootton for the MMM-UKLiveBusStopInfo module, which I used as reference.
Nigel Daniels for the MMM-Tube-Status module, which I used as reference.
Michael Teeuw for the MagicMirror2 framework that made this module possible.