I was inspired by several DIY projects. The ESP8266 WiFi 802.11 b/g/n Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266[…]
ESP8266 WiFiManager EEPROM My next addition to previous projects battery-wifi-iot-temp-hum-soil-moisture-sensors and battery-powered-esp8266-iot-logger is to make wifi configuration smooth and fast.
My new project consists of HW with cost under 20€. It is able to accurately measure electric power consumption and sends data via WiFi. Great source of knowledge is openenergymonitor.org which includes also Arduino library.