myWater
Software for intelligent plant pot watering system This software is written in C.
Link for Arduino tutorial: http://www.mikrocontroller-elektronik.de/nodemcu-esp8266-tutorial-wlan-board-arduino-ide/
Link time-lib https://blog.thesen.eu/lokale-uhrzeit-mit-dem-esp8266-und-einem-ntp-zeitserver-inklusive-sommerwinterzeit/
LInk GSender http://www.instructables.com/id/ESP8266-GMail-Sender/