tinySniff — Gas Sensor HAT for tinyCore

A Gas/Air Quality (MEMS) sensor board for the tinyCore ESP32-S3 platform.

Measures Methane, Hydrogen, and Hydrogen Sulfide. Great for air-quality and environmental monitoring projects.

Purchase · Discord · Documentation

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Pinout

tinySniff uses the following tinyCore GPIO pins. These are active whenever the HAT is mounted, so avoid assigning them to other peripherals in your own sketches.

MEMS Sensor Pinouts

Signal	GPIO	Description
H2	A2	GM-2021B (Hydrogen) Sensor
H2S	A1	GM-602B (Hydrogen Sulfide) Sensor
CH4	A0	GM-402B (Combustible Gas / Methane) Sensor

How to open the Schematic (Altium)

The tinySniff design files are provided as an Altium Designer project. Altium Designer is a professional electronic design automation (EDA) software package.

To open the files:

1. Open Altium Designer (requires a commercial license or the free Altium Viewer. Free student licenses are available).
2. Click File > Open Project...
3. Navigate to the Hardware folder of this repository and select the .PrjPcb project file.
4. Once the project loads in the Projects panel, you can access:
   • Schematic Editor - Double-click the .SchDoc file to view the circuit design.
   • PCB Editor - Double-click the .PcbDoc file to view the board layout.

The project will open with all associated files (schematic, PCB, and libraries) ready to view and edit.