Sensebender Micro + button

[Pierre P]

I personaly think that it's quite good. When powered by FTDI, it found 3.00V.
And I have only add the "//" to BATT_SENSOR and it work good.
(you inverted the thing in the message just above).

Thanks again for you help.
Now i work very good and very fast. I just have to check for adding an antenna to the controller.

[tbowmo]

@Pierre-P

The FTDI probably supplies the board with 3.3V and not 3V..

[alexsh1]

@Pierre-P How do you find the battery life please? I am planning to fit Sensebender with nrf24l01+ SMD and CR2032, but I wonder how long the battery is going to survive? Appreciate if depends on your sketch, but given one is conservative (i.e. no need to send temp/hum every 30-60 sec, but probably every 5-10mins or so), what's your estimate please?

[Pierre P]

I can't tell you for the moment, I haven't check the real voltage of the CR2032 at the beginning. I'll try to make two mesure between 30 days.
But my sketch is 1800000ms or 30min sleeping (if no-one press the button). Because it's a redundant information, my Jeedom controler have a meteo plugin who's working good. (i'll use it for the mini-night-temperature to have a message if there is glass on my car's windows).

[iotcrazy]

@Pierre-P you controller image looks great . What controller is it ?

[Pierre P]

@iotcrazy It is Jeedom, you can find some information here: http://www.mysensors.org/controller/jeedom
It use an RPI2 if you ant to make it yourself, and a major version will come during the week !

[alexsh1]

@martinhjelmare Any idea why siVolt is reporting values rounding up to either 2V or 3V in Domoticz? All I'd like to have is something like 2.9V

[martinhjelmare]

@alexsh1

How are you calculating and sending it? Did you change to float? There was a bug in my original sketch.

Make sure at least one of the operands is a float in the division.

float siVolt = vcc / 1000.0;

[alexsh1]

@martinhjelmare

Yes, it is declared as float

void sendBattLevel(bool force)
{
  if (force) lastBattery = -1;
  long vcc = readVcc();
  if (vcc != lastBattery) {
    lastBattery = vcc;
  float siVolt = vcc / 1000;
#ifdef BATT_SENSOR
    gw.send(msgBatt.set(siVolt, 2));
#endif

It is reported as either 2.000V (battery) or 3.000V (USB) in Domoticz
Changing siVolt to int or changing 2 in set does not change anything.

[martinhjelmare]

@alexsh1 said:

float siVolt = vcc / 1000;

You should change 1000 to 1000.0, i.e. a float. Float math will be used if any of the operands is a float.
https://www.arduino.cc/en/Reference/Arithmetic

[alexsh1]

@martinhjelmare Stupid me! Thanks for bringing this up - these issues are so simple, but very easy to overlook. I was about to start pulling my hair out....