“This project shows you how to automate and control from a mobile phone a school bell ring using a ESP8266 module with a relay and Blynk
The main features could be the following:
Access to a network wifi to control the device from a Blynk app
Access to Blynk servers to ensure the time of the device was always on time
Timers to sound the bell ring each change of class
Schedule holidays and weekends to prevent the ring bell from ringing
It doesn´t use batteries to maintain the configuration because it is stored in the Blynk servers
I hope you like.”