This project implements an alcohol measurement system using an MQ-3 gas sensor connected to an ESP32 microcontroller. ... MQ-3 gas sensor. WiFi module for connectivity. Web server for user interface.

The AI-On-The-Edge-CAM board, however, appears to have just been introduced and had two pieces left in stock selling for $28 on Tindie when I started this article, and is now out of stock.. You can ...