Oregon Scientific THGR268; Wireless Temperature & Humidity Sensor, RF transmission Frequency : 433 MHz; Number of channels : 3; RF transmission Range : maximum 30 meters; Temperature sensing cycle : around 40 seconds (THGR268 TH-GR268 THGR-268 THG-R2
Temperature Sensor Outdoor Unit ,rthn318,rtgn318,thn132n,rthr328n,thgn132es - Integrated Circuits - AliExpress
Oregon Scientific THGR268 Cable Free Remote All Weather Thermo-Hygro Sensor
User manual Oregon Scientific THGR810 (English - 1 pages)
GitHub - Erriez/ErriezOregonTHN128: Oregon THN128 transmit and receive C library for Arduino