c3RE is the hackerspace in the Recklinghausen district (northern Ruhr area, NRW, Germany).

Sustainability projects:

• Development of an open source heat pump (together with B7 e.V.)

• Photovoltaics on & around our houses

• We cook regularly our dinner

• Environmental sensors with LoRaWAN

• Gas meter logging with reed contact or magnetometer

• Make power consumption transparent using IR or Modbus communication

• Reuse & repair

  Other interesting c3RE projects:

• cocktail robot https://hectorbot.de/de/

• Mate-bottle display https://pads.c3re.de/matedisplay#

• MarQueTT[ino] https://github.com/c3re/MarQueTT

• Word Clock https://github.com/Kater--S/Kater-s-Word-Clock

• Nerd.re https://nerd.re -> jitsi https://meet.nerd.re

• home automation with Tasmota & nodeRed

• Button machine

• Cutting plotter

• Amateur radio

• Analog gaming day