ANAVI Gas Detector

An ESP8266-powered, open source, Wi-Fi dev board for monitoring air quality and detecting dangerous gases.

May 27, 2020

From Gas Detector to Fume Extractor

by ANAVI Technology

As you know, in August 2019 I created ANAVI Gas Detector - an open source Wi-Fi dev board for monitoring indoor air quality and detecting dangerous gases. Thanks to your support during the crowdfunding campaign here at Crowd Supply it became a reality.

I placed one ANAVI Gas Detector in my kitchen and soon after that I placed another on my desk where I practice my hobbies like soldering. At that time I was using a bulky and noisy solder smoke absorber. Naturally, an idea came to my mind: let’s upgrade the gas detector to a fume extractor by putting a brushless 5V DC fan and a filter. After a few months ANAVI Fume Extractor was born!

If you take a closer look at the development boards of ANAVI Gas Detector and ANAVI Fume Extractor you will notice a lot of similarities. Same dimensions of the PCB (75 mm x 40 mm), same micro USB connector, same button, same UART pins for flashing custom firmware, same slots for sensors and mini OLED display, of course the same ESP8266 Wi-Fi microcontroller. However, ANAVI Fume Extractor has several important differences:

Both ANAVI Gas Detector and ANAVI Fume Extractor work with the popular MQ-135 analog gas sensor module for detecting general air quality in buildings and offices. Another similarity between ANAVI Gas Detector and ANAVI Fume Extractor is that both are entirely open source and made with free and open source tools only. The printed circuit boards have been designed with KiCad and the acrylic enclosures with OpenSCAD.

Out of the box, just like ANAVI Gas Detector, the default open source firmware of ANAVI Fume Extractor works with the MQTT protocol and it is compatible with the popular open source IoT platform Home Assistant. This allows you to monitor real-time data from the various sensors and to control the fan remotely.

Soldering is fun but solder fumes are dangerous. If you, like me, also like soldering, hurry and place an order during the crowdfunding period to be among the first owners of ANAVI Fume Extractor!


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