This was my reference. Both the models are similar, though the one without the PCB(4 pin model) might require some resistance. Not sure though…Need to dig Deeper :D
Cheers :)

@d3r Dht 22 and 11 series doesnt require one :)

PS: Just saw the post.Was out of town for two weeks…

@jsyzthz Unfortunately neither did I have any luck executing with sudo while using ‘DISPLAY=:0’ .

For auto start I used PM2.

This is my mm.sh file

cd ~/MagicMirror
DISPLAY=:0 sudo npm start

P.S : I haven’t yet tried this alternative by Bangee. But it sure looks promising in this scenario where we need the mirror to start from ssh(or Terminal) while specifying the display device.

If i come across any workarounds, I’ll update.
Cheers.

@H3L1o150 currently, to define the pin to which sensor is connected, you need to edit the node_helper.js file ind MMM-Temperature-Humidity directory and edit line number 12.
var dht = new rpiDhtSensor.DHT11(2); to var dht = new rpiDhtSensor.DHT11(21);

you can leave the config as

            {
			module: 'MMM-Temperature-Humidity',
			position: 'bottom_right',
			config: {
				refreshInterval: 10000,
				temperaturePrefix: "Room temperature: ",
				temperatureSuffix: "°C",
				humidityPrefix: "Humidity: ",
				humiditySuffix: "%"
			}
		},

guess this needs to be improved in future release… :D

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@jsyzthz Glad I could help :D :D

Awsome!!
@MichMich Great initiative!!

Good news for the community!
Cheers People. \m/

@jsyzthz
I’m not sure whether to rebuild in MMM-Temperature-humidity directory or the Magic Mirror directory.
Try executing in the MagicMirror directory first.

npm rebuild --runtime=electron --target=1.4.0 --disturl=https://atom.io/download/atom-shell --build-from-source

Also you can find the electron version by : npm list

Just in case, i had this in my commands history :D
npm rebuild --runtime=electron --target=1.3.4 --disturl=https://atom.io/download/atom-shell --abi=49 -d

@jsyzthz I ran into the same while setting up!

try this. Go to MMM-Temperature-Humidity,

npm rebuild --runtime=electron --target=1.4.0 --disturl=https://atom.io/download/atom-shell --build-from-source

My Electron version is 1.4.0. If yours is different, replace accordingly. :D

This is a known issue which is caused by the serialport module using native code that is built for a different version of Node. You can read a bit more about addons here, if you’re interested; they’re just modules written in C/C++ that can interface with Node so the module can interface with the hardware more easily.

Credits : stackoverflow.com

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@Bangee According to bcm2835 v1.50-

"Running as root
Prior to the release of Raspbian Jessie in Feb 2016, access to any peripheral device via /dev/mem on the RPi required the process to run as root. Raspbian Jessie permits non-root users to access the GPIO peripheral (only) via /dev/gpiomem, and this library supports that limited mode of operation.

If the library runs with effective UID of 0 (ie root), then bcm2835_init() will attempt to open /dev/mem, and, if successful, it will permit use of all peripherals and library functions.

If the library runs with any other effective UID (ie not root), then bcm2835_init() will attempt to open /dev/gpiomem, and, if successful, will only permit GPIO operations. In particular, bcm2835_spi_begin() and bcm2835_i2c_begin() will return false and all other non-gpio operations may fail silently or crash."

So i guess we have run with sudo until some other library comes up :D

PS: I should!! Its too hot in here… :D :D

@cowboysdude Thanks! Cheers :D

@cowboysdude DHT11 - This is the sensor that I am using.

It has three pins -
+ve - Connected to 5v
-ve - Ground
Data - Connected to pin 2

@Bangee Now, I am running as sudo npm start. Without sudo, it will throw an exception that says it cannot open dev/mem

This is the module screenshot.