💬 MyMultisensors

[scalz]

@alexsh1
sure PIR state is 0 or 1. I'm not changing anything to this. But you can fine tune this.

Do you mean you'll update each time there is a CHANGE ?? No intermediate state ??
If so, you'll waste a lot of power in useless radio TX, mcu processing, depending on days and traffic. and your batteries won't last for long!

When there are people for an hour in same room, do you update each time it triggers? That can be a lot of waste!
Also why not allowing a blindtime before redecting?
In days with lot of traffic at home for example. If you already know (or the controllers could adjust this dynamically too by custom commands) that a room will be busy. It's useless and will consumes power again, to send 0 if it will retrigger in just a few seconds.

So i've done sort of helper for creating intermediate states with timeouts and counters, with user defines etc.

[alexsh1]

I would only update each time there is a first HIGH. Then the node goes to unconditional sleep for 30-60 sec - there is no need to send HIGH again or LOW. After 1 min the status in Domoticz for the PIR is cleared (LOW) and the PIR is ready to send another "HIGH" if triggered.

Can Domoticz really adjust PIRs dynamically?
There is blockly stript, which helps to process "HIGH" from a PIR, but I'm not aware how this can done dynamically.

Clearly, you approached this as a programmer. I have a much more simplified approach. Maybe because I'm noobs when it comes to PIRs

@scalz said in 💬 MyMultisensors:

@alexsh1
sure PIR state is 0 or 1. I'm not changing anything to this. But you can fine tune this.

Do you mean you'll update each time there is a CHANGE ?? No intermediate state ??
If so, you'll waste a lot of power in useless radio TX, mcu processing, depending on days and traffic. and your batteries won't last for long!

When there are people for an hour in same room, do you update each time it triggers? That can be a lot of waste!
Also why not allowing a blindtime before redecting?
In days with lot of traffic at home for example. If you already know (or the controllers could adjust this dynamically too by custom commands) that a room will be busy. It's useless and will consumes power again, to send 0 if it will retrigger in just a few seconds.

So i've done sort of helper for creating intermediate states with timeouts and counters, with user defines etc.

[Sergio Rius]

@alexsh1
My domoticz installation does not resets Pirs after a minute or whenever. Are you using the PIR lua scripts or any other?
By default it doesn't do such thing.

[scalz]

@alexsh1 i have this option too (ctrl clearing pir state) i thought it could depend on the controller used, so i've tried to make something independant. And i like adding features like setting triggers max for a motion etc. But i agree, your way works too ;)

[alexsh1]

@Sergio-Rius either you have to use lua or there is a much simpler way to do it in Domoticz. Change type to "motion sensor" and then you have an option "off delay". Setup it to 60 seconds and PIR sensor will be off in 60 seconds. Very useful option and yes it is not enabled by default.

[alexsh1]

@scalz can your controller adjust PIRs dynamically?
What controller are you using please?

[scalz]

@alexsh1 i just said i have same option as you in my controller :) My controller is jeedom (french ctrlr)
I've not done it yet (missing time), but i would use some script and scenario if i would like to dynamically adjust this vs some parameters.

[alexsh1]

@scalz How are you dealing with PIR? It is connected to D6 and D7, but sleep(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), CHANGE, SLEEP_TIME); can only be used with D2 and D3 or I am mistaken? Maybe you can share your motion sketch please?

[scalz]

@alexsh1 I'm using pinchange interrupts. It is not supported in Mysensors out of box regarding sleep, if i remember, i made some change to my functions, but the lib has changed a bit. that would need i check the code and i have no time for the moment, and don't want to release something not up to date. will take a look later, don't know when yet.

But if that can help, below is some parts of code, for enabling your irqs, and the interrupts routine. I think if you're using sleep from MySensors, it will return -1 if triggered by the pinchange, that's all. you'll just need to handle that in your sketch.

ISR (PCINT1_vect) 
{
  if (digitalRead(AMBIANT_LIGHT_PIN)) 
    irqLight = false;  
  else 
    irqLight = true; 
}  

ISR (PCINT2_vect) 
{
  if((PIND & (1 << PIND6)) == 0x40 ) {  
	  myPirSensor.pirhCount++;  
		myPirSensor.irqPir = true;  
	}
  if((PIND & (1 << PIND7)) == 0x80 ) {  
	  myPirSensor.pirlCount++;  
		myPirSensor.irqPir = true;  
	}        
} 

/* ======================================================================
Function: pirIntEnable
Purpose : Enable pin change for PIR interrupt
Input   : -
Output  : -
Comments:  
====================================================================== */ 
void pirIntEnable() 
{
  // Enable pin change for D6, D7
  PCMSK2 |= bit (PCINT22);  
  PCMSK2 |= bit (PCINT23);  
  PCIFR  |= bit (PCIF2);   // clear any outstanding interrupts
  PCICR  |= bit (PCIE2);   // enable pin change interrupts for D0 to D7 
}
/* ======================================================================
Function: pirIntDisable
Purpose : Disable pin change for PIR interrupt
Input   : -
Output  : -
Comments:  
====================================================================== */ 
void pirIntDisable() 
{
  // Disable pin change for D6, D7
  PCICR  ^= bit (PCIE2);   // disable pin change interrupts for D0 to D7 
}
/* ======================================================================
Function: lightIntEnable
Purpose : Enable pin change for OPT3001 interrupt
Input   : -
Output  : -
Comments:  
====================================================================== */ 
void lightIntDisable() 
{
  PCMSK1 |= bit (PCINT9);  
  PCIFR  |= bit (PCIF1);   // clear any outstanding interrupts
  PCICR  |= bit (PCIE1);   // enable pin change interrupts for A0 to A5   
}
/* ======================================================================
Function: Light_IntDisable
Purpose : Disable pin change for OPT3001 interrupt
Input   : -
Output  : -
Comments:  
====================================================================== */ 
void lightIntDisable() 
{
  PCICR  ^= bit (PCIE1);   // disable pin change interrupts 
}

[alexsh1]

@scalz said in 💬 MyMultisensors:

Thank you for sharing it.
I must admit, it does look Chinese to me. I have never come across pinchange interrupts so have to dive in to understand it.

[alexsh1]

My sensor is now fully completed with all sensors and flash. I decided to go for 2450 battery

[scalz]

@alexsh1
beautiful !
about pin change interrupt, that would be too bad, to be restricted to D2, D3 only :)
there are multiple howtos which show how to use them. mcu datasheet section is also interesting. not that hard, don't worry.
you'll need to clean the code above a bit to fit your sketch (variables etc). the counters on pinh and pinl were for tests, you can factorize a bit pir isr and use only one volatile variable for your trigger etc.

Have fun

[Carywin]

Here's my first 5 multi-sensors assembled and they've passed simple hardware tests. Although I think I have 2 that have PIRs that won't settle down. Thanks for the design scalz!

Now to write some firmware for them... Any hints?

[Terrence]

@Carywin Wow, those look really great, please keep us posted on your progress.

[Carywin]

I've been slowly poking at these boards and I'm getting somewhere with the firmware, I should have something ready to put out there soon.

In the meantime though I designed a quick snap-together enclosure that I'm sending off for "Dirty" 3D printing:

This is my first time using Fusion 360 and designing something for 3D printing, hopefully it goes okay.

I wanted it to snap together in two halves around the board and be as low-profile as possible, hence why the base plate only covers half of the PCB and is mounted by one screw only. I designed it around using a CR2450 battery. I might also see if I can find a small lens or light pipe to put over the lux sensor so it gets a better read on the light level in the room.

[Carywin]

Okay, so here's some firmware I wrote for these multi-sensors: https://github.com/carywin/MySensors/tree/master/MyS_MultiSensor_revB

Note that I'm currently using MySensors 2.2-beta from the development branch, to solve the some other problems I was having in my RFM69-based gateway. This sketch should still work fine with the released version of MySensors but I haven't tested it.I'm still testing and refining things here and there, but it should be a working base for people to build from. Of course you will need to change the MySensors #defines to match your network and radio settings.

You'll probably notice that all of the sensors report under the same Child ID as a "Custom Sensor". This is because I'm using OpenHAB via an MQTT broker, so I don't really care if a certain sensor type matches with its provided variable types. If you're using a different controller, you may have to re-jig the Child ID/Variable types to match the known-working sensors on your controller.

PIR Sensor:
The PIR sensor is interrupt driven and will send a message when it receives more than 5 pulses in less than 5 seconds. After triggering, the interrupt is disabled for 60 seconds. If it receives fewer than 5 pulses then approx. 5 seconds after the last pulse it will reset the pulse counter. For the first 30 seconds after power-on, the PIR interrupts are disabled to allow the signal conditioning circuit time to settle. All of these values are configurable in the sketch. Note that I'm using GreyGnome's EnableInterrupt library, which you'll need to get from their Github.

Lux Sensor:
The lux level sensor will send a new reading to the controller when the lux reading moves outside a window threshold from the current reading, which is configurable in the sketch. It also takes a new reading after a certain period with no changes in lux, which is also configurable in the sketch.
Note that you'll need the specific version of the OPT3001 library from the above link copied into your libraries folder. I modified the library to spit out raw values and allow the setting of thresholds, so the lux sensor can do most of the heavy lifting with regards to monitoring light levels and flagging an interrupt when it changes. Note that when the lux readings are very low, such as around sunrise and sunset, the threshold values are fixed to prevent excessive lux sensor messages.

Door Sensor:
The D3 pin input is set to trigger an interrupt on state change, which will send its new state to the controller on each change. It's pulled high by an on-board resistor so the input pullup is disabled to save energy.

Temp & Humidity Sensor:
Temperature and humidity are read at regular intervals (default 10 min), and new values only sent if the they have changed by 0.1 degC or 1% RH. If a certain number of intervals pass with no change (default 3 hours) they will send new values anyway. This way the controller can expire their readings after 3 hours and ignore stale values, and you can get an indication that maybe your sensor has failed. The interval times are configurable in the sketch. I'm using the Adafruit SI7021 library which you can get from their Github.

Battery:
Once a day by default the sensor will report battery voltage as a sensor, and remaining capacity as a percentage using the in-built reporting function. The full and empty thresholds as well as reporting interval are configurable in the sketch. Note that the method used to measure battery voltage has a large margin for error, but that this can mostly be calibrated out. For this reason you'll see a VCC calibration value that you should set by measuring each sensor's battery voltage with a multimeter, and comparing with its reported battery volts.

WDT:
I'm using the WDT during the time when the code isn't asleep, with a timeout of 2 seconds. This should be more than enough to send all of the sensor messages needed each cycle, but I haven't extensively tested that. I included it because in revision A I was suffering some kind of unknown lock up that would keep the MC awake and drain the coin cell battery in just a few hours. Of course the WDT is used by the library for timing the sleep intervals, so it gets re-enabled each wake up.

Because timing how long an Arduino has been asleep is difficult without a RTC, the sleep time may vary somewhat depending on how many interrupts the sensor receives. Each time the MC is woken from sleep by an interrupt, it reduces the amount of time it will sleep next time by 25%. In addition to this, if more than 25 interrupts occur before a new round of sensor readings are taken, then the interval will be declared over and the sensors read again. These are crude methods for timing but so far it seem to be reliable in that the sensor neither sleeps forever nor spams excessively when receiving realistic rates of interrupt.

I welcome any input people have on this project and ways that this might be improved.

[scalz]

@Carywin
Good work :+1:
I will take a look when i'll have more time.

[Adi Vacaru]

I was wondering why didn't you use a open drain comparator and you could have or-ed your outputs using only one MCU pin ?

[scalz]

because there was already enough parts on board, for power consumption and wanted to save as much as i could with this design.
The prototype had it though, but i removed it because that was useless as there are more than enough pins for this on mcu.

[Adi Vacaru]

good answer ! it's not a good one for those of us that are less 'code gifted'. but anyway good work for the design.i would have to study how i can get it to work in code.