💬 Power Meter Pulse Sensor

[sundberg84]

Anyone knows why I dont get the sleep() function (time) to work properly.

My hardware is EasyPCB, Pro Mini 3.3v 8mhz, Booster 2xAA and NRF24 radio.
My software is: standard sketch 2.0.1, with sleep function.

The problem is the sleep time is 5 times less than declared so maybe timing?
When i enter sleep(10000) for example the nodes sleeps for 2 sec and wakes up.

The interupt works fine.

My sollution was adding *5 to get the correct sleep time - but why doesnt it work?

[maghac]

@flopp I had to set pcReceived to true, upload the sketch, run it and then change back to false again and recompile/reupload. I can understand why it does it, since you don't want the pulse counter to reset to 0 if the sensor happens to restart (because you killed the power or whatever).

What I don't understand is how I can seed the value with the correct initial value.

Is it the controller (in my case HomeAssistant) or the gateway that is supplying the value?

[maghac]

It appears to be the controller that stores the value. I deleted the sensor from HomeAssistant and restarted, when it came back in again it started from zero.

[martinhjelmare]

@maghac

This is a hack, but if using json persistence, you can set the count in the JSON file and restart home assistant, with the node turned off. Then turn on the node.

[maghac]

@martinhjelmare Yep, I figured I could do that. The absolute value is not so important actually, I'm more interested in the daily/weekly delta, which I hope Grafana can tell me.

[gohan]

is this the same sensor than the one in the guide?
http://uk.farnell.com/ams/tsl250r-lf/photodiode-sensor-l-volts/dp/1182346

Can I also use also photoresistor? (Since I already have one)

[sundberg84]

@gohan - nope its not the same, and yes you can use a photoresistor (i have just made one) but I needed a transistor for it to work and also it had to be completley dark. Using this on batteries its much better using just a photoresistor because the sensor in the guide draws about 1mA which will drain the batteris very quickly.

I will post my sensor later.

Edit: this is the sensor i build:

The node (including pro mini) draws about 50uA sleeping and 170uA not sleeping.
The photoresistor was 5M ohm in complete dark.

[gohan]

The guide specifies LM393 Light Sensor or the tsl250r-lf so I thought it was the same since the same name.
Since the node will be powered with it's power supply, I don't have any battery drain problem in this case. But why did you use a transistor? Can't you just check for a threshold value in the analog input to count as a pulse?

[sundberg84]

Ok, all I can see is that it doesnt look the same at all.
@gohan - I tried, and I thought that should work - but for some reason I could not get it to trigger the interupt on the atmega :(
Looking the the voltage thresholds it was supposed to work but it didnt. I was thinking it was to low uA but i dont know really.

[flopp]

This is what I use togeheter with LM393
https://www.kjell.com/se/sortiment/el-verktyg/elektronik/optokomponenter/ir-dioder-fototransistorer/fototransistor-p90042

[gohan]

@sundberg84

Instead of the 10k resistor, do you think I could use a potentiometer to "adjust" sensitivity? I would like to avoid messing up the readings with lights entering when opening the cabinet door where the meter is located

@flopp
Do you mind sharing your wiring? 940nm, isn't it infrared?

[sundberg84]

@gohan - a potentiometer is just a variable resistor so why not? Good idea if you have one laying around.
As i said before though, the try with the transistor is just a try - im not that good with transistors yet and dont know how they work exactly. After this i read somewhere that the base resistor should be bigger to protect the transistor... dont know how to calculate that.

[flopp]

@gohan said in 💬 Power Meter Pulse Sensor:

@sundberg84

@flopp
Do you mind sharing your wiring? 940nm, isn't it infrared?

I connected the photo resistor directly to the LM393.
I don't know if that is IR.

[moumout31]

Hello,

First, thanks for this tutorial !
I used the code defined in tutorial but I have the following message for "void receive(const MyMessage &message)" :

'MyMessage' does not name a type

Do you know what can be the cause of this error please ?

Thanks in advance for your help

[mfalkvidd]

@moumout31 do you have void receive(const MyMessage &message) somewhere in your code or where does it come from?
Could you post the full error message?

Have you installed the MySensors library?

[moumout31]

@mfalkvidd void receive(const MyMessage &message) is in the code.
MySensors library is installed, I already use it in other nodes.
It's strange because it works in another computer...

The full error messages, in french beacause I'm french are :

Arduino : 1.8.0 (Windows 7), Carte : "Arduino Pro or Pro Mini, ATmega328 (3.3V, 8 MHz)"

_02_Main_loop:271: error: 'MyMessage' does not name a type

In file included from C:\Users\Anne-Laure\Documents\Arduino\libraries\arduino_759467/MySensors.h:257:0,

                 from C:\Users\Anne-Laure\Dropbox\Maison\A récupérer sur OneDrive\my_teleinfo_light\_02_Main_loop.ino:118:

C:\Users\Anne-Laure\Documents\Arduino\libraries\arduino_759467/core/MyTransport.cpp: In function 'void transportProcessMessage()':

C:\Users\Anne-Laure\Documents\Arduino\libraries\arduino_759467/core/MyTransport.cpp:745:14: error: cannot resolve overloaded function 'receive' based on conversion to type 'bool'

   if (receive) {

              ^

C:\Users\Anne-Laure\Documents\Arduino\libraries\arduino_759467/core/MyTransport.cpp:811:15: error: cannot resolve overloaded function 'receive' based on conversion to type 'bool'

    if (receive) {

               ^

exit status 1
'MyMessage' does not name a type

Bibliothèque non valide trouvée dans C:\Users\Anne-Laure\Documents\Arduino\libraries\MySensors : C:\Users\Anne-Laure\Documents\Arduino\libraries\MySensors

Ce rapport pourrait être plus détaillé avec
l'option "Afficher les résultats détaillés de la compilation"
activée dans Fichier -> Préférences.

Thanks for your help

[mfalkvidd]

@moumout31 My guess is that MyMessage is defined in your sketch, overriding the definition in the MySensors library. Could you post your sketch?

[moumout31]

@mfalkvidd It's strange... It works with an older version of Arduino software... Thus, the problem is solved ! Thanks

[moumout31]

Hello,

I don't understand why, but my power meter sensor gives a higher index than the real power meter index after 2 days.
I think that it counts more pulses than pulses provided by the power meter...
Does anybody encounter this problem ?
Can it be cause to bounce for example ?

Thank you

[gohan]

@moumout31
could it be getting some light from another source?