HardLabs

Openair2

OpenAirCgn·openairnode-hw

Openair2 PCB layout, top view — open source ESP32 board by OpenAirCgn

About the Openair2 PCB

Openair2 is an open source ESP32 PCB design by OpenAirCgn, published on GitHub. It is a 2-layer board measuring 35 × 70 mm, with 69 components from 46 distinct parts.

Its main chip is the ESP-WROOM-32, from the ESP32 family. Other key parts include the FT231XQ, SC189Z, SI7006-A20, RFM95W and MIC2004-1.2YM5. By type, the board carries 23 resistors, 12 capacitors, 11 test points, 6 ICs, 5 connectors and 2 transformers.

From the project

Schematics and board design of "next gen" OpenAir board revision

This repository contains the Kicad schematics and board layouts for the OpenAir sensor plattform, as well as the bill of materials.

- 1.4 changed voltage regulator footprint (IC3), to a more common pinout, removed MICS sensor

Main components on the Openair2

ESP-WROOM-32FT231XQSC189ZSI7006-A20RFM95WMIC2004-1.2YM5

Openair2 bill of materials (BOM)

69 components, 46 distinct parts.

QtyPartRefs
1
ESP-WROOM-32
IC1
1
FT231XQ
IC2
1
SC189Z
IC3
1
SI7006-A20
IC5
1
RFM95W
IC6
1
MIC2004-1.2YM5
U1
1
PM
P1
1
MOD1
P2
1
MOD2
P3
1
FAN
P4
1
PWR
P5
1
CONN_2
ANT1
1
RESET
BTN1
1
USER
BTN2
2
HOLE
H1, H2
2
MMBT2222ALT3G
T2, T3
1
5V
TP1
1
3V3
TP2
1
GND
TP3
1
TXD
TP4
Show 26 more
QtyPartRefs
1
~RTS
TP5
1
RXD
TP6
1
~DTR
TP7
1
SHLD
TP8
1
ANT
TP9
1
~RST
TP10
1
BOOT
TP11
1
USB
USB1
1
LED
LED1
1
D_Schottky
D1
1
2.2u 1A BDCD002520122R2MS1
L1
1
FERRITE
L2
2
0.1u
C1, C5
3
10u
C3, C4, C14
1
10n
C6
2
47p
C7, C8
3
0u1
C9, C11, C13
1
4u7
C10
7
10K
R1, R3, R4, R13, R14, R15, R16
1
1K
R2
1
22K
R5
6
27
R6, R8, R9, R11, R12, R19
2
47K
R7, R10
2
220
R17, R18
2
DNP
R20, R21
2
2K2
R26, R27

Openair2 design files

The KiCad project lives in the OpenAirCgn/openairnode-hw repository on GitHub; these links point at the commit this page was built from.

Openair2: common questions

What microcontroller does the Openair2 use?

The Openair2 is built around the ESP-WROOM-32, from the ESP32 family.

How big is the Openair2 PCB?

The Openair2 measures 35 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Openair2?

69 components, from 46 distinct parts. The full bill of materials is listed on this page.

Where can I download the Openair2 design files?

From the OpenAirCgn/openairnode-hw repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Openair2 design in my own project?

The repository has no license, so all rights stay with OpenAirCgn. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Openair2 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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