by jjmz

DS18B20, nrf24l01, stc15l204 in mailbox outside, another device in house. rx via nrf24l01 and Raspi.

by matehall

Boiler temp. Temp to radiators and temp from radiators.

by matehall

Grove particle sensor,Shinyei PPD42NS, on a Arduino Uno connected to a MySensors.org network using Nrf24L01.

by matehall

Measuring outside temp and temp in garage.