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Battery Powered ESP8266 IoT – Door Sensor

I successfully run DHT22 battery ESP8266 temperature/humidity IoT sensor so my next project is a simple IoT Door Sensor. It is up and running and sending a simple event to my HTTP server via wifi[…]

Battery Powered Wifi IoT – Temperature, Humidity & Soil Moisture Sensors

I have just made a prototype of ESP8266 (ESP-01) IoT temperature & humidity SI7021 sensor and also 2x three pin soil moisture sensors with only 0.006mA (6µA) current drain during the sleep.