When a letter is sent into the mailbox notify through the line application, inside the mailbox there is IR sensor for detecting objects entering, the average distance of detecting letter IR sensor is centimeters. This IR sensor is connected to the Arduino microprocessor and a chip module for communicating on the
Control automatic the light for save energy and more convenient. Can be detect human motion within range 180° degrees and detection distance 12 meters. max (<24 ํc ) Can be adjustable sensor both daytime and night-time. Adjust ambient light from 3-2,000 lux. Adjust time delay from 10 sec-15 min.