With an ESP-WROOM-02 and an MQ-3 alcohol sensor you can easily make a portable alcohol detector. It will be a simpler implementation of the earlier project “Arduino breathalyzer:
The LILYGO TTGO T-Journal is one of the new ESP32 development boards with a built-in 2-megapixel camera module. In addition to the camera, WiFi and Bluetooth, this board
The “WEMOS D1 Esp-Wroom-02” that I got from VNG Systems is another microcontroller development board with an ESP8266 WiFi chip. This board also has an OLED screen, 18650 battery charging
One of the fun things about Arduino is the availability of many types of sensors. With those sensors you are able to measure and detect about anything. Most of them
Nowadays, OLED screens for electronics projects are very affordable. They come in many shapes and sizes. Some are monochrome or two color but you can also get full
