Arduino Pro Mini ATmega328 @ 3.3V 8M. ESP8266-01 WiFi Module. DHT21 (AM2301) Digital Temperature Humidity Sensor Module. Accuracy: 0.1 Measurement range: 0-100%RH Precision: ±3%RH. Temperature measurement range: -40℃ ~ +80℃. Precision: ±0.5℃
Prueba de medicion de datos con ESP8266 - DHT11 mediante WiFi en la mina
Fiddling with 2 off uninsulated matte black domestic flat radiator panels heating a 7,000 litre swim spa. WEMOS D1 running DS18B20 1-wire sensors switching on a small pump when solar output exceeds spa temperature by 1 deg C. Total area 1.2 sq M, 700 W