I have it remove and make a new installation, after this it comes errors:

pi@Mirror:~/MagicMirror/modules/MMM-PIR-Sensor $ sudo npm install -g

epoll@0.1.21 install /usr/lib/node_modules/Magic-Mirror-Module-PIR-Sensor/node_modules/epoll
node-gyp rebuild

gyp WARN EACCES user “root” does not have permission to access the dev dir “/root/.node-gyp/6.10.0”
gyp WARN EACCES attempting to reinstall using temporary dev dir “/usr/lib/node_modules/Magic-Mirror-Module-PIR-Sensor/node_modules/epoll/.node-gyp”
make: Entering directory ‘/usr/lib/node_modules/Magic-Mirror-Module-PIR-Sensor/node_modules/epoll/build’
CXX(target) Release/obj.target/epoll/src/epoll.o
SOLINK_MODULE(target) Release/obj.target/epoll.node
COPY Release/epoll.node
make: Leaving directory ‘/usr/lib/node_modules/Magic-Mirror-Module-PIR-Sensor/node_modules/epoll/build’

Magic-Mirror-Module-PIR-Sensor@1.1.0 postinstall /usr/lib/node_modules/Magic-Mirror-Module-PIR-Sensor
electron-rebuild -e …/…/node_modules/electron

sh: 1: electron-rebuild: not found
npm ERR! Linux 4.4.50-v7+
npm ERR! argv “/usr/bin/nodejs” “/usr/bin/npm” “install” “-g”
npm ERR! node v6.10.0
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-PIR-Sensor@1.1.0 postinstall: electron-rebuild -e ../../node_modules/electron
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the Magic-Mirror-Module-PIR-Sensor@1.1.0 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-PIR-Sensor 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-PIR-Sensor
npm ERR! Or if that isn’t available, you can get their info via:
npm ERR! npm owner ls Magic-Mirror-Module-PIR-Sensor
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-PIR-Sensor/npm-debug.log

@cowboysdude

No, this is not the problem, I have unlined this, because I can not use the Mirror, when I delete the // I see the black screen.

It’s my fault to show the config.js this the //.

Here, but I think it is not a problem with the config.js, because when I have the module in the config.js include and deinstall the module in Magicmirror/modules I can see the Mirror:

var config = {
        port: 8080,
        ipWhitelist: ["127.0.0.1", "::ffff:127.0.0.1", "::1"],

        language: 'de',
        timeFormat: 24,
        units: 'metric',

        modules: [
                {
                        module: 'alert',
                },
//      {
//              module: 'MMM-PIR-Sensor',
//              config: {
//              relayGpio: '26',
//              relayOnState: '0',
//              powerSaving: false,
//                      // See 'Configuration options' for more information.
//              },
//      },
        {
            module: 'MMM-Carousel',
            config: {
                transitionInterval: 10000,
                ignoreModules: [],
                mode: 'positional',
                top_right: {enabled: true, ignoreModules: [], overrideTransitionInterval: 15000}
            }
        },

                {
                        module: "updatenotification",
                        position: "top_bar"
                },

                {
                module: 'MMM-FRITZ-Box-Callmonitor',
                //position: 'top_bar',  // This can be any of the regions. Best results in left or right regions.
                //header: "Recent calls", // This is optional
                config: { password: 'xxx'
                }
                },
        {
                module: 'MMM-Callmonitor-Current-Call',
                position: 'top_bar',    // This can be any of the regions. Best results in left or right regions.
                //header: "Active Calls", // This is optional
        },
                {
                        module: 'clock',
                        position: 'top_left'
                },
                  {
                    module: 'MMM-DHT22',
                        position: 'top_left',
                    config: {
                      sensorPIN: 22,
                       updateInterval: 0.5, // Minutes
                     },
                      },
                {
                        module: 'currentweather',
                        position: 'top_left',
                        config: {
                                location: 'xxx',
                                locationID: 'xxx',  //ID from http://www.openweathermap.org
                                appid: 'xxx'
                        }
                },

                {
        module: 'MMM-Traffic',
        position: 'top_left',
        classes: 'dimmed medium', //optional, default is 'bright medium', only applies to commute info not route_name
        config: {
                api_key: 'xxx',
                mode: 'driving',
                origin: 'xxx',
                destination: 'xxx',
                //arrival_time: '0800', //optional, but needs to be in 24 hour time if used.
                route_name: 'xxx',
                changeColor: true,
                showGreen: false,
                limitYellow: 5, //Greater than 5% of journey time due to traffic
                limitRed: 20, //Greater than 20% of journey time due to traffic
                traffic_model: 'pessimistic',
                interval: 120000, //2 minutes
                showWeekend: true,
                allTime: true,
        }
                },
                {
                        module: 'calendar',
                        header: 'Termine',
                        position: 'top_right',
                        config: {
                                calendars: [
                                        {
                                                symbol: 'calendar-check-o ',
                                                url: 'xxxs',
                                                maximumEntries: '5'
                                        }
                                ]
                        }
                },
               {
                    module: "MMM-Fuel",
                   position: "top_right",
                         config: {
                        api_key: "xxx",
                lat: xxx,
                        lng: xxx,
                         types: ["diesel"],
                        max: 2,
                        rotate: false,
                        colored: true,
                        open: true

                    }
                },
  //             {
//                               module: 'MMM-Wunderlist',
//                      position: 'top_right',  // This can be any of the regions. Best results in left or right regions.
//                      header: 'Wunderlist', // This is optional
//                      config: {
  //                    // See 'Configuration options' for more information.
    //                                   }
   //   },
                {
                        module: 'weatherforecast',
                        position: 'top_right',
                        header: 'Weather Forecast',
                        config: {
                                location: 'xxx',
                                locationID: 'xxx',  //ID from http://www.openweathermap.org
                                appid: 'xxx'
                        }
                },
//              {
//                      module: 'newsfeed',
//                      position: 'bottom_bar',
//                      config: {
//                              feeds: [
//                                      {
//                                              title: "xxx",
//                                              url: "xxxl"
//                                      }
//                              ],
//                              showSourceTitle: true,
//                              showPublishDate: true
//                      }
//              },
        ]

};

/*************** DO NOT EDIT THE LINE BELOW ***************/
if (typeof module !== 'undefined') {module.exports = config;}

Hello,

it’s my first entry here.

I will start to build a MagicMirror and I have a Problem with the MMM-PIR_Sensor Modul.

I have installed and have no problems at the install, but will the Mirror start I see only a black screen. When I move the mouse at the raspberry I can see the mouse arrow.

When I unmarker the PIR-Module lines in the config.js . I can see the normal Mirror.