You have to execute npm startin the MagicMirror directory, not in the home directory of your user pi. E.g. do cd MagicMirror (or /home/pi/MagicMirroror whatever your MM directory is) and then run npm start.

@mytamhuyet What? Why would it power down without being told to do so. My mirror runs for months without a restart.

Glad it worked!

This is my crontab:

# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
0 6 * * * pm2 reload mm

Are you running crontab -ewith sudo? Because you have to run it as the user that runs MM (= most likely without sudo).

Edit: @Zwirbel: For me it works using a cronjob. See what I wrote above and if you have questions regarding crontab, just ask again.

Depennding on the other modules you’re using it might be good to reload MM more than once a day. In my case once is enough. Without reloading the screen turns black after more than one day. Depending on your setup it could be better to reload it twice or 4 times a day. In the end the reload is very quick and you won’t notice anything.

I could use mine because it worked through the prick wall behind the mirror.

The microwave sensor is compatible with the MMM-PIR-sensor module.

Are you using the GoogleMapsTraffic module? In that case the pm2 reload mm will do. Or a simple Ctrl+R on the mirror. The cronjob should then look something like 55 19 * * * pm2 reload mm (mine is 0 6 * * * pm2 reload mm and it works flawlessly).

@thobach Is it possible to adjust the regular MMM-Wunderground module for the DarkSky api? That’d be awesome as I really liked the look and the icons of the Wunderground module. I had it set up to show hourly and daily forecast. Which was just perfect.

It’s a nice idea. Maybe it even works withe MMM-PIRsensor module. Just give it a try. A quick Google search leads to a Pi compatible SW-420. They cost a few cents on AliExpress.