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
Cheers

Posts made by psk
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@d3r Dht 22 and 11 series doesnt require one
PS: Just saw the post.Was out of town for two weeks…
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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. -
RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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);
tovar 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…
Note from admin: Please use Markdown on code snippets for easier reading!
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RE: MagicMirror is voted number 1 in the MagPi Top 50!
Awsome!!
@MichMich Great initiative!!Good news for the community!
Cheers People. \m/ -
RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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
npm rebuild --runtime=electron --target=1.3.4 --disturl=https://atom.io/download/atom-shell --abi=49 -d
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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.
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
Note from admin: Please use Markdown on code snippets for easier reading!
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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()
andbcm2835_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
PS: I should!! Its too hot in here…
@cowboysdude Thanks! Cheers
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RE: MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)
@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.