You might have noticed, https://stalker.beestalker.eu/ now also shows the temperature at my balcony.

Beside this, that prove-of-concept site, shows you the battery voltage. It's not calibrated so it's readings are a bit low.

Well, having said that, the slope did made me having some headakes. The batteries get empty way too fast. This let me have a closer look at the power-saving modes of the AVR and some of the resistor values. All in all the current in sleep-mode changed from approx 500µA to.....

I updated my running Beestalker to this firmware and it seems it helped a little. But it's under 24h so we'll see...

That first 3 days would give me about 10days of runtime at approx 3 measurements per hour. In the fields this will change to 1 measurement per hour. so 30days are realistic.

It seems the real problem is the Raspberry. The RPi Zero is reported to have lower power consumption but I really cannot get my hands on one of these :(

Anyhow, there are some more things on the RPi to try...

This brings me to my schedule... I'm in the States on a business-trip (that EMC-stuff I'm doing for a living) until saturday... so I do expect myself getting the PCB done (the booster needs a footprint the rest is actually fixed) for the BeeStalker MK2 done by wednesday (20th).

Having that said, I promise to get all the rest of the documentation done by the deadline of this round :)

Feel free to have a look at my GIT repo (https://gogs.9mal6.de), hosted on my VPS in the meanwhile.

BTW, thank's for all that skulls! You have nearly sponsored my MK2 PCBs!

73