MMM-Temperature/Humidity Module (DHT11, DHT22 and AM2302 sensors.)

[paviro]

Please also share a link to your module and some screenshots!

[psk]

oops!! I forgot to post the link. My bad :|

The module can be found here.

[cowboysdude]

What is the brand and perhaps part number you’re using for this? Wiring?

[Bangee]

@psk Do you need to run magicmirror as root?

I try to find a solution to do the same as pi

[Jopyth]

@Bangee As far as I know, the normal pi user has sudo rights already. I use a module to shutdown the mirror which needs sudo rights, but works fine with exec from a normal node_helper.

[Bangee]

@Jopyth yes, he has, but he’s going to start the MagicMirror with sudo npm start

for security reasons I try to run everything without sudo commands.

[psk]

@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.

[Bangee]

I’m using node-dht-sensor

As user pi I don’t have an error but after starting MagicMirror thers a crash.

@psk you should cool down your room :-)

[cowboysdude]

I really do like this! Great job!

[psk]

@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