💬 Motion Sensor

[gohan]

Since it is a powered node, you don't need to put it to sleep. As for the pir you can do as you like: check pin status during loop, use an attach interrupt function on pin change, etc

[MCF]

@gohan ok thank you for answering. if i do this:

void loop() 
{
  // Read digital motion value
    bool tripped = digitalRead(DIGITAL_INPUT_SENSOR)== HIGH;
    
    Serial.println("coucou");
    Serial.println(tripped);
    send(msg.set(tripped?"1":"0"));  // Send tripped value to gw
    }
    // Sleep until interrupt comes in on motion sensor. Send update every two minute.
    //sleep(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), CHANGE, SLEEP_TIME);
}

the node never stop to send message to the gateway. i would like to send something only if D1 goes to high, is that possible ? (i'm starting combinating exemple and i want to understand what i do now!!)

[wes]

@siod The HC-SR501 actually runs on 3.3VDC but has a 5VDC-3.3VDC regulator on board.

There are several ways to bypass this regulator, but the easiest is to connect your 3.3VDC supply to pin 3 of JP3 (the one marked "H").

You must make sure that your 3.3VDC supply is very stable, otherwise you will get false activations.

See:
https://randomnerdtutorials.com/modifying-cheap-pir-motion-sensor-to-work-at-3-3v/
https://www.youtube.com/watch?v=5jhTQAV-hg0
https://www.mpja.com/download/31227sc.pdf

[joaoabs]

Hi,

The code

sleep(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), CHANGE, SLEEP_TIME); 

doesn't need a ISR (Interrupt Service Routine) function? Should we assume that if no ISR is defined, the node will wake in the loop function?

[gohan]

Yes, it will wake and run the loop once

[patrikr76]

So i was testing out the motionsensor sketch and it kept giving me "!TSF:MSG:SEND" after the initial 0 had been sent.

Finding no answers on here i tested loads of things until i tried a delay after the sleep command.
Running fine now with a 5msec delay.

Just thought i would share.

[mitsured]

I connected a 12v DC input and no matter what I do the output always shows 12V. It never goes to a "low" 0V output. From what I read these can use between a 5v and 20v input so I'm assuming a 12v input should not be an issue and still produce a High when triggered and Low 0V when not triggered output. What am I doing wrong?

[bereska]

@patrikr76 thank you so much. I had the same issue with my motion sensor and spent 2 days pulling my hair out)

[etlizzie]

Was anyone able to reduce the delay time? 5 seconds is too long for me.

[EileenWen]

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