Smart postbox

On 16 August 2019, I've participatd Iot contest by  the department of computer science, Chiangmai University

The postbox is made from plaswood which gradyally strong and easy to modify. It has ESP8266 for controller. The controller will count the letters with reed switch and magnet at the box and sent notification to LINE when there're letters in. There is SH1106 that can display the amount of the letters too. 

The smart postbox can tell us if there're letters in a box via LINE application and it can also tell the amount of the letters in the postbox.

In this contest, My postbox get "Admired" reward with 750.- for a prize.