MagicMirror remains Black

[fredall]

Hi I have installed the MMM-MPR121 Module on my magic mirror and have copy pasted the example config to my config.js file but when I restart the mirror remains back. As soon as I comment "//" the MPR121 related config in config.js the mirror is working fine again. I can't find the error.

following is my config.js section related to MPR121: // { // module: 'MMM-MPR121', // config: { // buttons: [ // { // pin: 0, // name: "monitor_control", // longPress: { // notification: "REMOTE_ACTION", // payload: {action: "MONITOROFF"} // }, // shortPress: { // notification: "REMOTE_ACTION", // payload: {action: "MONITORON"} // } // }, // { // pin: 1, // name: "power", // longPress: { // title: "Power off", // message: "Keep pressed for 3 sec$ // imageFA: "power-off", // notification: "REMOTE_ACTION", // payload: {action: "SHUTDOWN"} // }, // shortPress: undefined // } // ] // } // },

I followed the installation guide for MMM-MPR121 module. I am using 12 keys MPR121 board from adafruit. I installed the mpr-121 controller as descibed in Adafruit. The module is working as tests as explained here is showing touch buttons are working perfectly: https://learn.adafruit.com/mpr121-capacitive-touch-sensor-on-raspberry-pi-and-beaglebone-black/usage

[fredall]

some additional information. I got folowing warning after running "npm install" for MMM-MPR121

i@raspberrypi:~/MagicMirror/modules/MMM-MPR121 $ sudo npm install npm WARN prefer global node-gyp@3.6.2 should be installed with -g

i2c-bus@1.2.5 install /home/pi/MagicMirror/modules/MMM-MPR121/node_modules/i2c- bus node-gyp rebuild

gyp WARN EACCES user "root" does not have permission to access the dev dir "/root /.node-gyp/6.12.3" gyp WARN EACCES attempting to reinstall using temporary dev dir "/home/pi/MagicMi rror/modules/MMM-MPR121/node_modules/i2c-bus/.node-gyp" make: Entering directory '/home/pi/MagicMirror/modules/MMM-MPR121/node_modules/i2 c-bus/build' CXX(target) Release/obj.target/i2c/src/i2c.o SOLINK_MODULE(target) Release/obj.target/i2c.node COPY Release/i2c.node make: Leaving directory '/home/pi/MagicMirror/modules/MMM-MPR121/node_modules/i2c -bus/build' npm WARN lifecycle Magic-Mirror-Module-MPR121@1.0.0~postinstall: cannot run in wd %s %s (wd=%s) Magic-Mirror-Module-MPR121@1.0.0 electron-rebuild -e ../../node_mo dules/electron /home/pi/MagicMirror/modules/MMM-MPR121

[PatriceG]

Hello, Depending on which user you're logged with on your Raspberry PI you should indeed run sudo npm -g install

This should fix your issues with permissions and install the required library correctly.

If the magicmirror remains black, check its log in ~/.pm2/logs The error log usually shows what's preventing the MagicMirror from starting up.

[fredall]

This did not work unfortunately. I now get errors:

sudo npm -g install

i2c-bus@1.2.5 install /usr/lib/node_modules/Magic-Mirror-Module-MPR121/node_modules/i2c-bus node-gyp rebuild

gyp WARN EACCES user "root" does not have permission to access the dev dir "/root/.node-gyp/6.13.1" gyp WARN EACCES attempting to reinstall using temporary dev dir "/usr/lib/node_modules/Magic-Mirror-Module-MPR121/node_modules/i2c-bus/.node-gyp" make: Entering directory '/usr/lib/node_modules/Magic-Mirror-Module-MPR121/node_modules/i2c-bus/build' CXX(target) Release/obj.target/i2c/src/i2c.o SOLINK_MODULE(target) Release/obj.target/i2c.node COPY Release/i2c.node make: Leaving directory '/usr/lib/node_modules/Magic-Mirror-Module-MPR121/node_modules/i2c-bus/build'

Magic-Mirror-Module-MPR121@1.0.0 postinstall /usr/lib/node_modules/Magic-Mirror-Module-MPR121 electron-rebuild -e ../../node_modules/electron

sh: 1: electron-rebuild: not found npm ERR! Linux 4.9.35-v7+ npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "-g" "install" npm ERR! node v6.13.1 npm ERR! npm v3.10.10 npm ERR! file sh npm ERR! code ELIFECYCLE npm ERR! errno ENOENT npm ERR! syscall spawn

npm ERR! Magic-Mirror-Module-MPR121@1.0.0 postinstall: electron-rebuild -e ../../node_modules/electron npm ERR! spawn ENOENT npm ERR! npm ERR! Failed at the Magic-Mirror-Module-MPR121@1.0.0 postinstall script 'electron-rebuild -e ../../node_modules/electron'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the Magic-Mirror-Module-MPR121 package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! electron-rebuild -e ../../node_modules/electron npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs Magic-Mirror-Module-MPR121 npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls Magic-Mirror-Module-MPR121 npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request: npm ERR! /home/pi/MagicMirror/modules/MMM-MPR121/npm-debug.log

I tried allready to uninstall MMM-MPR121 and have deleted the MMM-MPR121 directory. Redo the installation but get same error messages. Also updated with apt-get update and apt-get upgrade and error remains.

I did not find the .pm2 folder.

[PatriceG]

I'm no nodejs expert so I'm not sure I can help you. Maybe try not to install the module globally: sudo npm install I don't understand why the root user would not have the required permissions.

The .pm2 folder should be in your home dir type: cd ~ ls -a

And you should see a .pm2 folder

My MagicMirror installation is 1 year old and does not use the latest framework so it might be different with the latest one. I won't update mine since my mirror is working fine and I know there are breaking changes in the latest version (related to the webcam usage).

[fredall]

I have now update npm and node.js to latest version. I reran npm install and now get no more error messages.

But still black screen whenever I activate MMM-MPR121 in config.js I could find the .pm2 folder but have no clue where the error is comming from.

I'll stop for tonight.

[PatriceG]

Good. In the .pm2 folder you have the pm2.log file, which does not have much information but may be useful anyway when pm2 can't start the MagirMirror app for instance. The .pm2/logs folder contains the MagicMirror log files mm-error-0.log and mm-out-0.log When the Mirror won't start you will likely have the cause of the error in one of these log files. This happened a lot to me when I was configuring my mirror.

By the way, I think I found the cause of the problem. Your config is incorrect here, you typed a $ instead of a " to terminate the string and forgot the comma: // message: "Keep pressed for 3 sec$

should be // message: "Keep pressed for 3 sec",

When the mirror won't start I often copy and paste my config file into an online json validator to make sure its syntax is correct. And most of the startup errors I had were caused by missing commas or quotes :)

[fredall]

thx for the reply. Unfortunately the $ is not the error. this is just from the nano editor because my window was not large enough to display the whole line.

Thx for the hint on json validator. I did not know that exists.

[fredall]

Hi I got it solved by running "npm install --unsafe-perm"

[PatriceG]

Good. I've added a note to my readme.md page with this in case someone else runs into this issue. The json validator I often use is this one: https://jsonlint.com/

BTW, you may already know but I've shown my mirror on the forum, here: https://forum.magicmirror.builders/topic/2641/my-living-room-mirror