A soil moisture sensor based on nRF52. Uses capacitive sensing for measurements and Bluetooth Low Energy to send the readings.
The is work in progess. PCB is done and ordered, firmware yet to come.
Based on Chirp! designed by Albertas Mickėnas. Find out more here: https://github.com/Miceuz/PlantWateringAlarm https://wemakethings.net/chirp/