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    2 Mirrors and one Sensor ( MMM-PIR-Sensor )

    Hardware
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    • B
      binia last edited by

      is it posible to add only one sensor to 2 Raspberry Pi?
      Regards

      1 Reply Last reply Reply Quote 0
      • B
        binia last edited by

        noone?
        I have in 1 Mirror 2 Display and Pi and want to add a sensor.

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        • S
          sdetweil last edited by

          sorry, do not understand question… typically one uses ONLY 1 PIR sensor…

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          • B
            binia last edited by

            Sorry for my bad English.

            I have 2 Magic.Mirrors in a mirror and just wanted to use 1 PIR module for both.

            Therefore the question if this is technically possible or if I have to use a module for each raspberry.

            S 1 Reply Last reply Reply Quote 0
            • S
              sdetweil @binia last edited by

              @binia oh!.. you have two monitors inside your single mirror!.. wow…

              all u need is the signal pin of the PIR… and connect the grounds together on the two PI devices…

              otherwise you could have one PI send a MMM message to the other to wakeup…

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              • B
                binia last edited by

                0_1551861410991_IMG_20180916_150055.jpg 0_1551861416010_IMG_20180916_150101.jpg 0_1551861420245_IMG_20181218_144954.jpg 0_1551861424435_IMG_20181218_145005.jpg

                S 1 Reply Last reply Reply Quote 0
                • B
                  binia last edited by

                  its 160cm x 65cm
                  One is a TV and one a Display

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                  • Sean
                    Sean Module Developer last edited by Sean

                    You can install one PIR on one RPI(A).
                    Then, you can modify or build a module to send HTTPRequest to other RPI(B) on RPI(A) which has PIR sensor
                    Then, you can also modify or build a module to catch HTTPRequest on RPI(B) to use it as a signal for your job.

                    • MMM-PIR-Sensor (RPI(A)) : You can modify socektNotificationReceived() to emit your custom notification,
                      Or send HTTPRequest directly to RPI(B)
                    • MMM-NotificationTrigger (RPI(A)) : Or you can translate notification from MMM-PIR-Sensor to your custom notification for further relayed module,
                      Or you can execute directly external shell command/internal javascript for sending HTTPRequest when notification is coming from MMM-PIR-Sensor
                    • Or … you can build your own module for this job.

                    • MMM-Remote-Controller (RPI(B)) : You can get HTTPRequest from RPI(A) to do something
                    • MMM-NotificationTrigger(RPI(B)) : This module also can catch HTTPRequest and do something
                    • Or … you can build your module for this job.

                    • Or you can make scripts with javascript or python or any other language to communicate between two RPIs. It will be not so difficult to expert, but…
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                    • B
                      binia last edited by

                      Thanks for your answer.
                      I will try it.

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                      • Sean
                        Sean Module Developer last edited by Sean

                        Here is a simple example for using MMM-NotificationTrigger. Not tested, but you can catch the concept.

                        Assumption

                        • RPI_A
                          • MM IP : 192.168.178.101:8080
                          • PIR_SENSOR is installed
                          • This will emit notification "USER_PRESENCE" with payload true/false
                        • RPI_B
                          • MM IP : 192.168.178.102:8080
                          • PIR_SENSOR IS not installed.
                          • It needs payload value of USER_PRESENCE from RPI_A

                        RPI_A MMM-NotificationTrigger config

                        {
                          module: "MMM-NotificationTrigger",
                          config: {
                            triggers: [
                              {
                                trigger: "USER_PRESENCE",
                                triggerPayloadFilter: (payload) => {
                                  return payload
                                },
                                fires: [
                                  {
                                    fire: "DUMMY_NOTIFICATION",
                                    exec: `curl -d "notification=RELAYED_USER_PRESENCE&payload=true" http://192.168.178.102:8080/webhook`
                                  }
                                ]
                              },
                              {
                                trigger: "USER_PRESENCE",
                                triggerPayloadFilter: (payload) => {
                                  return !payload
                                },
                                fires: [
                                  {
                                    fire: "DUMMY_NOTIFICATION",
                                    exec: `curl -d "notification=RELAYED_USER_PRESENCE&payload=false" http://192.168.178.102:8080/webhook`
                                  }
                                ]
                              },
                            ]
                          }
                        },
                        

                        If USER_PRESENCE notification is emitted from MMM-PIR-Sensor, it will be translated to DUMMY_NOTIFICATION and curl shell command will be executed to transfer message(RELAYED_USER_PRESENCE) to RPI_B

                        RPI_B MMM-NotificationTrigger config

                        {
                          module: "MMM-NotificationTrigger",
                          config: {
                            useWebhook: true,
                            triggers: [
                              {
                                trigger: "RELAYED_USER_PRESENCE",
                                fires: [
                                  {
                                    fire: "DOING_MY_JOB",
                                    payload: (payload) => {
                                      return (payload == "true") ?  true : false
                                    }
                                  }
                                ]
                              }
                            ]
                          }
                        },
                        

                        By useWebhook:true it can listen message from RPI_A. When RELAYED_USER_PRESENCE is coming, DOING_MY_JOB (or whatever you want) notification will be emitted on RPI_B

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