First larger firmware update for the Voltswagen. For details see Battery Life or ID.Furkan or Schräg.
First part of update downloading 
First part installed 
Second part downloading 
Second part installed 
Done!
Category: Uncategorized
EVSE
ID Charger pro EVSE for the new Voltswagen.
Husdata datalogger for heat-pump
I got this husdata datalogger for my heat-pump.
It plugs in to a 3.5mm audio-connector inside the electronics box of the pump. On an IVT geo 312C pump it's fairly easy to install by removing the big front cover, then a smaller black cover, and then opening the electronics-box. I routed the wire into the pump via a tube-hole at the top, and then through the cable-hole of the electronics box (lower right). It plugs into a 3-wire 'BBT' interface.
The datalogger reads info from the pump and broadcasts it over wifi either to the husdata-website or over MQTT to any compatible device.
Datalogger with interface cable. 
IVT geo 312C electronics box, with husdata-cable connected to BBT-interface 
Pump information as displayed on husdata website.
Partial solar eclipse 2021-06-10
Not-so-great phone camera picture through a small telescope of the partial solar eclipse on 2021-06-10 from Espoo, Finland.
See also:
Automower season end
Total hours 1357 (2020: 397 hours, 2019: 444 hours, 2018: 516 hours).
The phone-app now has more statistics: distance 1901 km, 1165 charging cycles, 1077 hours charging.
Mowing season end
In 2018 the automower worked for 516 hours. By October 2019 the count is at 960 hours, so it has worked 444 hours during the 2019 season.
The outer shell is removable - so all the grass clippings can be cleaned off...
Time for a winter break, back to work in May 2020.
Mowers gonna mow
The Automower logged 516 hours last season. Now in action again with new sharp blades.
516 hours during 2018 season (May-Oct) 
old blades, new blades.
Arduino MKR Zero + Ethernet Shield
Here's a new revision of the RF-mux board, with a 10-pin ribbon cable for +5V, +3.3V, and SPI-signals from an Arduino MKR Zero.
Geothermal well drilling
Time-code transmitter
RF power amplifier of DCF77 modulated time-code transmitter.