Aqi monitor
About the Aqi monitor PCB
Aqi monitor is an open source ESP32 PCB design by wngxp, published on GitHub. It is a 2-layer board measuring 102.5 × 201.2 mm, with 95 components from 45 distinct parts.
Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the TP4056-42-ESOP8, DW01A, MT3608 and TLV62569DBV. By type, the board carries 29 resistors, 24 capacitors, 14 diodes, 8 connectors, 5 ICs and 5 switches.
It belongs with the sensors, displays & leds and power & battery designs in this gallery.
From the project
A custom indoor air-quality monitor with particulate, carbon-dioxide, temperature, humidity, and pressure sensing; a round color display; a nine-pixel status gauge; and an optional connected backend and mobile app.
A custom indoor air-quality monitor with particulate, carbon-dioxide, temperature, humidity, and pressure sensing; a round color display; a nine-pixel status gauge; and an optional connected backend and mobile app.
- Measures PM1.0, PM2.5, and PM10 from a Plantower particulate sensor. - Measures CO2 with a Sensirion SCD40. - Measures temperature, humidity, and pressure with BME280 and DHT11 sensors. - Presents particulate, environment, and CO2 pages on a 240 x 240 GC9A01 display. - Shows air-quality severity on a nine-pixel WS2812B arc. - Provides physical controls for brightness, LED mode…
Main components on the Aqi monitor
Aqi monitor bill of materials (BOM)
95 components, 45 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-S3-WROOM-1 | ESP32-S3-WROOM-1 | U1 |
| 1 | TP4056-42-ESOP8 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U2 |
| 1 | DW01A | SOT-23-6 | U3 |
| 1 | MT3608 | SOT-23-6 | U5 |
| 1 | TLV62569DBV | SOT-23-5 | U6 |
| 1 | AO3401A | SOT-23 | Q1 |
| 1 | FS8205A | SOP65P640X120-8N | Q2 |
| 1 | CONN_01X08_MOUNTINGPIN Conn_01x08_MountingPin | Molex_Panelmate_53780-0870_1x08-1MP_P1.25mm_Horizontal | J1 |
| 1 | CONN_01X06 Conn_01x06 | PinSocket_1x06_P2.54mm_Vertical | J2 |
| 1 | CONN_01X10 Conn_01x10 | PinSocket_2x05_P1.27mm_Vertical | J3 |
| 1 | CONN_01X04 Conn_01x04 | PinSocket_1x04_P2.54mm_Vertical | J4 |
| 1 | CONN_01X03 Conn_01x03 | PinSocket_1x03_P2.54mm_Vertical | J5 |
| 1 | CONN_01X06 Conn_01x06 | PinSocket_1x07_P2.54mm_Vertical | J6 |
| 1 | USB_C_RECEPTACLE_POWERONLY_6P USB_C_Receptacle_PowerOnly_6P | USB_C_Receptacle_GCT_USB4125-xx-x_6P_TopMnt_Horizontal | J7 |
| 1 | Barrel_Jack_MountingPin | BarrelJack_Horizontal | J8 |
| 2 | Polyfuse | Fuse_1206_3216Metric | F2, F3 |
| 4 | SW_Push | SW_PUSH_6mm | SW1, SW2, SW3, SW4 |
| 1 | SW_SPST | SW_Slide-03_Wuerth-WS-SLTV_10x2.5x6.4_P2.54mm | SW5 |
| 1 | 10K @ 25C | PinHeader_1x02_P2.54mm_Horizontal | TH1 |
| 3 | TestPoint | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP1, TP2, TP3 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GRN | LED_D5.0mm | D1 |
| 1 | RED | LED_D5.0mm | D2 |
| 1 | D_Schottky | D_SOD-123 | D4 |
| 1 | D_Schottky | D_SMA | D5 |
| 9 | WS2812B-2020 | LED_WS2812B-2020_PLCC4_2.0x2.0mm | D7, D8, D9, D10, D11, D12, D13, D14 +1 |
| 1 | SMAJ5.0A | D_SMA | D19 |
| 1 | 4.7UH 4.7uH | L_1210_3225Metric | L1 |
| 1 | 2.2UH 2.2uH | L_1812_4532Metric | L2 |
| 3 | 22UF 22uF | C_0603_1608Metric | C1, C14, C15 |
| 18 | 100NF 100nF | C_0603_1608Metric | C2, C3, C5, C6, C7, C8, C9, C12 +10 |
| 1 | 1UF 1uF | C_0603_1608Metric | C10 |
| 1 | 10UF 10uF | C_0603_1608Metric | C11 |
| 1 | 4.7UF 4.7uF | C_0603_1608Metric | C16 |
| 6 | 10K | R_0603_1608Metric | R2, R3, R4, R5, R23, R28 |
| 4 | 40K | R_0603_1608Metric | R6, R8, R10, R12 |
| 6 | 1K | R_0603_1608Metric | R7, R9, R11, R13, R16, R17 |
| 2 | 5.1K | R_0603_1608Metric | R14, R15 |
| 2 | 2K | R_0603_1608Metric | R18, R20 |
| 1 | 470R | R_0603_1608Metric | R19 |
| 2 | 100K | R_0603_1608Metric | R21, R26 |
| 1 | 75K 75k | R_0603_1608Metric | R22 |
| 1 | 499K | R_0603_1608Metric | R24 |
| 1 | 453K | R_0603_1608Metric | R25 |
| 1 | 50R | R_0603_1608Metric | R27 |
| 2 | 1M | R_0603_1608Metric | R29, R30 |
Aqi monitor design files
The KiCad project lives in the wngxp/aqi-monitor repository on GitHub; these links point at the commit this page was built from.
- Layoutaqi-monitor.kicad_pcb
- Schematicaqi-monitor.kicad_sch
- BOMproduction/bom.csv
Aqi monitor: common questions
What microcontroller does the Aqi monitor use?
The Aqi monitor is built around the ESP32-S3-WROOM-1, from the ESP32 family.
How big is the Aqi monitor PCB?
The Aqi monitor measures 102.5 × 201.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Aqi monitor?
95 components, from 45 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Aqi monitor design files?
From the wngxp/aqi-monitor repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Aqi monitor design in my own project?
The repository has no license, so all rights stay with wngxp. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Aqi monitor 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.
Similar boards
ESP32Open Book Abridged Edition
joeycastillo
85 × 115 mm65 parts2LCC-BY-SA-4.08.1k
ESP32Esp32 minimal
atopile
36.2 × 26.8 mm20 parts2LMIT4.0k
ESP32Badge
56.3 × 39 mm239 parts4LMIT4.0k
ESP32Controller
StuckAtPrototype
29 × 74 mm58 parts4LApache-2.03.8k
ESP32Racer
36 × 50.2 mm70 parts4LApache-2.03.8k
ESP32Bitaxe
skot
56.5 × 99.8 mm86 parts4LCERN-OHL-S-2.01.4k