HardLabs

Smart air

meeTeam05·smart-air·hardware/Smart-Air.kicad_pcb

Smart air PCB layout, top view — open source ESP32 board by meeTeam05

About the Smart air PCB

Smart air is an open source ESP32 PCB design by meeTeam05, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 62 components from 27 distinct parts.

Its main chip is the ESP32-S3-DevKitC, from the ESP32 family. Other key parts include the RTC_DS3231M, AMS1117 and EL357N-G. By type, the board carries 19 resistors, 11 capacitors, 10 diodes, 7 ICs, 5 connectors and 4 transistors.

It belongs with the iot & wireless, sensors and displays & leds designs in this gallery.

From the project

Devices provision over BLE, publish telemetry/shadow over MQTT, and serve the app through a Cloudflare-fronted Fastify API. See Features below for the full breakdown. See the Hardware section for the board, sensors, and enclosure.

Devices provision over BLE, publish telemetry/shadow over MQTT, and serve the app through a Cloudflare-fronted Fastify API. See Features below for the full breakdown. See the Hardware section for the board, sensors, and enclosure.

- Firmware (ESP-IDF v5.4.2): BLE provisioning, Wi-Fi, MQTT over TLS/WSS, HTTPS OTA with rollback/validation, SHT3x (temperature/humidity), GM702B (CO) and GM102B (NO₂) gas sensors, DS3231 RTC with SNTP sync, LVGL on ILI9225 display, 3 relay channels (Fan/Lamp/Filter) with NVS persistence, WS2812 status LED, buzzer, and factory-reset button. - Server: Fastify API…

Smart air, from the project README
From the project README

Main components on the Smart air

RTC_DS3231MAMS1117EL357N-GESP32-S3-DevKitC

Smart air bill of materials (BOM)

62 components, 27 distinct parts.

QtyPartRefs
1
RTC_DS3231M
IC1
1
AMS1117
U1
3
EL357N-G
U2, U4, U5
1
~
U3
1
ESP32-S3-DevKitC
U6
4
SI2300
Q1, Q2, Q3, Q4
1
Screw_Terminal_01x04
J1
1
Conn_Jack-DC
J2
1
CO
J3
1
NO2
J4
1
SHT31
J5
1
CR1220
BT1
1
Buzzer
BZ1
3
G5NB
K1, K2, K3
1
R_Potentiometer
RV1
3
1N4007
D1, D6, D9
5
LED
D2, D3, D5, D7, D10
1
BAT54C
D8
1
BZT52C5V1
D11
1
10uF
C1
Show 7 more
QtyPartRefs
5
1uF
C2, C5, C6, C8, C9
5
100nF
C3, C4, C7, C10, C11
10
10K
R1, R2, R6, R7, R9, R11, R14, R16 +2
5
10K/0603/1%
R5, R10, R13, R15, R17
1
1K
R8
1
1K/0603/1%
R12
2
4.7K
R20, R21

Smart air design files

The KiCad project lives in the meeTeam05/smart-air repository on GitHub; these links point at the commit this page was built from.

Smart air: common questions

What microcontroller does the Smart air use?

The Smart air is built around the ESP32-S3-DevKitC, from the ESP32 family.

How big is the Smart air PCB?

The Smart air measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Smart air?

62 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Smart air design files?

From the meeTeam05/smart-air repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Smart air design in my own project?

Yes, under the terms of its MIT license, which meeTeam05 chose for the repository.

Can I test firmware for the Smart air 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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