@ncollins

throw this somewhere in your code:

void reboot() {
  wdt_disable();
  wdt_enable(WDTO_15MS);
  while (1) {}
}

and then calling the reboot (in the entire loop):

void loop() {

  if (motion_change) {
    motionDetected=!motionDetected;
    if (motionDetected) {
      send(msg.set("1"));  // motion detected
    }
    else {
      digitalWrite(LED_BUILTIN,LOW);  //turn-off LED to signify motion no longer detected
      send(msg.set("0"));  // send all-clear to prepare for future detections
    }    
    
    NRF_LPCOMP->EVENTS_CROSS=0;
    motion_change=false;
  }
  else { //must be a scheduled wake-up.  Time to report voltage as a heartbeat.
    batteryVoltage=((float)hwCPUVoltage())/1000.0;  //take voltage measurement after transmission to hopefully measure lowest voltage that occurs. 
    send(msg_S_MULTIMETER_V_VOLTAGE.set(batteryVoltage,3));  //send battery voltage with 3 decimal places
    time = millis();
    if (time > 14400000 ) {
      reboot();
    }
  }
  mySleep(1200000);  //sleep for 20 minutes
}```

@ncollins I had the same problem and sort of "solved" it by having it reboot every 3 hours (or maybe it was 6).

I don't know how to use the nrf5x stuff anywhere near well enough to actually fix it but it seems to work.

@scalz
Thanks for the link to the 3.3v USBASP mod!
i have been pulling my hair out trying to get bare 328p chips programmed using a generic ASP

thank you!!!

5 months and voltage still holding decently high
/77/28/1/0/38 2.964

@nca78 If you're talking about the basic motion sketch - I've tried it and it doesn't work

The node checks in when initially powered but i can't seem to trigger it...

It's post 1515 in nrf action
https://forum.mysensors.org/topic/6961/nrf5-action/1515

In particular I download the zip file from post 1543
https://forum.mysensors.org/topic/6961/nrf5-action/1543#

Re: nRF5 action!

I'm trying to modify @Nca78 GPIOTE example for the NRF51 for use on the nrf52 motion sensor I made with an optional reed/switch input for monitoring the door and motion in a bedroom.

I've gotten it to work on the NRF52 well enough and I can get an update when I close or open the reed OR motion sensor but I don't know how to separate them so I know WHICH one of the two triggered. I've tried for the past week but the nrf functions inside of arduino confuse me and I can't say i understand the NRF stuff all that well anyway.

@Nca78 could you please help? Based on the script you've already written I'm guessing it would take very little modification but I don't know what I'm doing

@berkseo said in nrf52832 PIR:

I would like to find an available pir sensor powered by 1.8 V

yeah, that'd be nice

thanks guys, i just ordered a few
@berkseo i was searching for buck/boost converters and found TPS61098 which when i searched for turned up on one of you designs

what i can't figure out just yet is how to wire it up for our application. can you shed any light on that, please?

well, i think i may have sorted it.... GND and MODE to ground. VSUB is 3.3 (or 3v if i do the 61098) out (not being used in this application?).

SW inductor, vin of course, and vmain is the output for the mcu i think

Yeah, it's an AM612. I think when I originally put this together I didn't realize the low cutoff voltage

We'll see how long it lasts...
I guess options then are to add a buck converter or strap AAAs on the back instead

Black fresnel lens? what?? I might have to find some of those