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

binia

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

binia

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

sdetweil

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

binia

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.

sdetweil

@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…

binia

binia

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

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…

binia

Thanks for your answer.
I will try it.

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