Read the statement by Michael Teeuw here.
[MMM-PIR-Sensor] Install failing
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 @Mar for anyone else who is getting this an npm rebuild fixes it. from here https://github.com/atom/apm/issues/635 
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 Hey, thanks for advising us how to install the modules, but I´m still struggling to find a solution for me even after updating nodejs and npm to the latest builts… 
 Similar error with corrected package.json.Unable to find electron-prebuilt's version number, either install it or specify an explicit versionI even tried the npm rebuild@Mar suggested. My last attempt to get this working was updating electron to its newest version but this didn´t help either.
 Is there anything I could further try to install this module correctly?
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 @Jay I forgot what I did here to fix this issue. But to be honest after I got this working it still wasnt perfect. I ended going the route of a script on startup that controls the PIR sensor and its been perfect since and simple. 
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 did you install the fix? or is this now obsolet? 
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 @Jopyth said in [MMM-PIR-Sensor] Install failing: @fox This PR should have fixed the issue (it is merged into the master). Are you running MagicMirror 2.1.0? And is your PIR-Module up-to-date? Try updating both (see this and do it in both directories) to the newest version.I deleted PIR Sensor completely. And made a new installation of this module and it installed without Problems. looks good from now 
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 This post is deleted!
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 Hi, i tried to install the module MMM-PIR-Sensor. I did it like its explained here: https://github.com/paviro/MMM-PIR-Sensor After installing the module i opened the config.js file an added: { module: 'MMM-PIR-Sensor', config: { sensorPIN: 23, powerSaving: true, relayPIN: none, relayOnState: 1, } },The way i connected the sensor is shown in the following picture:  But when i want to start the magic mirror it says that i have to add a correct config.js file. 
 What did i wrong? Please help me guys ;)
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 @STEFF92 
 Did you change the name of the config File from “config.js.sample” to “config.js”?
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 @Jay yes i did. The basic modules like clock or weather are running but when i add the module for the PIR sensor in the config.js file i cant start the magic mirror 



