O-hareAir
About the O-hareAir PCB
O-hareAir is an open source ESP32 PCB design by Will946, published on GitHub under the MIT license. It is a 2-layer board measuring 53.1 × 57.7 mm, with 43 components from 21 distinct parts.
Its main chip is the ESP32-H2-MINI-1, from the ESP32 family. Other key parts include the ENS161, AP2120, AP2205 and ENS210. By type, the board carries 16 capacitors, 14 resistors, 5 ICs, 3 LEDs, 2 switches and 1 transistor.
It belongs with the sensors, dev boards & breakouts and iot & wireless designs in this gallery, and the repository also holds 1 earlier revision of it.
From the project
An ESP32-based flower that measures air quality with real sensors and physically points a needle at how badly you need to open a window.
A desktop air quality monitor shaped like a flower. It watches temperature, humidity, and air quality (eCO2/eTVOC/AQI-UBA) with a ScioSense ENS161 + ENS210, points a physical stepper-driven needle at the current rating, glows green-to-red through an RGB LED, and serves a full live dashboard over Wi-Fi with history and CSV export. No app, no cloud, no account.
Main components on the O-hareAir
O-hareAir bill of materials (BOM)
43 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ENS161 | ENS161 | U2 |
| 1 | AP2120 | SOT-23 | U5 |
| 1 | AP2205 | AP2204 | U6 |
| 1 | ESP32-H2-MINI-1 | MODULE_ESP32-H2-MINI-1-H2 | U7 |
| 1 | ENS210 | ENS210 | U10 |
| 1 | BSS138 | SOT-23 | Q1 |
| 1 | USB_C_Plug_USB2.0 | GCT_USB4105-GF-A | P1 |
| 1 | SWITCH_0SMTRLFS | SWITCH_0SMTRLFS | S2 |
| 1 | TL1016AAF220QG | TL1016AAF220QG | S3 |
| 3 | IN-PI15TAT5R5G5B | IN-PI15_INL | LED1, LED2, LED3 |
| 1 | TPD1E10B06 | D_SOD-523 | D5 |
| 2 | 1uF | C_0603_1608Metric | C5, C10 |
| 1 | 47uF | C_0603_1608Metric | C9 |
| 9 | 0.1uF | C_0603_1608Metric | C11, C12, C13, C15, C16, C17, C24, C27 +1 |
| 4 | 10uF | C_0603_1608Metric | C14, C21, C22, C23 |
| 7 | 10k | R_0603_1608Metric | R1, R4, R9, R10, R11, R12, R20 |
| 1 | 470 | R_0603_1608Metric | R5 |
| 1 | 1M | R_0603_1608Metric | R16 |
| 2 | 5K1 | R_0603_1608Metric | R17, R18 |
| 1 | 100k | R_0603_1608Metric | R19 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22 | R_0603_1608Metric | R21, R22 |
O-hareAir design files
The KiCad project lives in the Will946/O-hareAir repository on GitHub; these links point at the commit this page was built from.
- LayoutOhareV2PCB/OhareV2.kicad_pcb
- SchematicOhareV2PCB/OhareV2.kicad_sch
O-hareAir: common questions
What microcontroller does the O-hareAir use?
The O-hareAir is built around the ESP32-H2-MINI-1, from the ESP32 family.
How big is the O-hareAir PCB?
The O-hareAir measures 53.1 × 57.7 mm, has 2 copper layers and is 1.66 mm thick.
How many components are on the O-hareAir?
43 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the O-hareAir design files?
From the Will946/O-hareAir repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the O-hareAir design in my own project?
Yes, under the terms of its MIT license, which Will946 chose for the repository.
Can I test firmware for the O-hareAir 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.
Earlier revisions in the repo: OhareV1
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