This project uses a NodeMCU ESP8266 board and an ultrasonic sensor to measure the level of a container. The sensor emits a high-frequency sound wave and measures the time it takes for the wave to ...

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In this paper, we are developing a garbage monitoring system by using a NodeMCU ESP8266 microcontroller and also GSM SIM800L, GPS Ublox Neo 6M and ultrasonic sensors.

Introduced back in June, the IKEA VINDRIKTNING is a $12 USD sensor that uses colored LEDs to indicate the relative air quality in your home depending on how many particles it sucks up. Looking to i… ...