Air quality station
V3lectronics·air-quality-station·air-quality-kicad-files/air-quality-kicad-files.kicad_pcb
About the Air quality station PCB
Air quality station is an open source ESP32 PCB design by V3lectronics, published on GitHub. It is a 2-layer board measuring 76 × 40 mm, with 14 components from 9 distinct parts.
Its main chip is the XIAO-ESP32C3, from the ESP32 family. By type, the board carries 8 resistors, 4 ICs, 1 transistor and 1 speaker.
It belongs with the sensors, iot & wireless and displays & leds designs in this gallery.
From the project
V Electronics air quality station design files & code
- USB C power/programming (MCU fully unlocked) - 2x16 LCD display + vertical bar LCD color display - No battery (a powerbank can be used) - Not waterproof
- GRAVITY PM2.5 air quality sensor link > [!TODO] //find cheaper for example https://www.dfrobot.com/product-2526.html > [!NOTE] > Other sensors can be used as alternatives if you need more precise measurements.

Main components on the Air quality station
Air quality station bill of materials (BOM)
14 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | AM2320 | U1 |
| 1 | ~ | OLED | U2 |
| 1 | ~ | Gravity | U3 |
| 1 | XIAO-ESP32C3 | XIAO-ESP32C3 | U4 |
| 1 | 2N3904 | TO-92_Inline | Q1 |
| 1 | PS1240P02BT | buzzer-XDCR_PS1240P02BT | LS1 |
| 6 | ~ | 10kOhm-pullup | R1, R2, R3, R4, R5, R6 |
| 1 | ~ | 120R | R7 |
| 1 | ~ | 4-7K | R8 |
Air quality station design files
The KiCad project lives in the V3lectronics/air-quality-station repository on GitHub; these links point at the commit this page was built from.
Air quality station: common questions
What microcontroller does the Air quality station use?
The Air quality station is built around the XIAO-ESP32C3, from the ESP32 family.
How big is the Air quality station PCB?
The Air quality station measures 76 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Air quality station?
14 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Air quality station design files?
From the V3lectronics/air-quality-station repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Air quality station design in my own project?
The repository has no license, so all rights stay with V3lectronics. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Air quality station without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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