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ESP32-Multi-Sensor

ashfaque-ur-rahman·ESP32-Multi-Sensor-PCB

ESP32-Multi-Sensor PCB layout, top view — open source ESP32 board by ashfaque-ur-rahman

About the ESP32-Multi-Sensor PCB

ESP32-Multi-Sensor is an open source ESP32 PCB design by ashfaque-ur-rahman, published on GitHub. It is a 4-layer board measuring 90.1 × 54.7 mm, with 78 components from 38 distinct parts.

Its main chip is the ESP32-C3-WROOM-02-H4, from the ESP32 family. Other key parts include the MCP73871, BME280, CP2102N-A02-GQFN20R, USBLC6-2SC6 and W25Q32JVSS. By type, the board carries 32 resistors, 22 capacitors, 7 ICs, 5 connectors, 4 diodes and 3 transistors.

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

From the project

ESP32-based multi-sensor PCB with temperature/humidity, light, and microphone sensors — 4 layer Board — KiCad design based on Tech Explorations tutorial

My most complex PCB design to date — an ESP32-C3 based multi-sensor IoT board featuring three sensors across a hierarchical, multi-sheet schematic. Designed over multiple days following the Tech Explorations tutorial series. This was my first experience with both 4-layer PCB stackup design and microphone amplifier circuit design.

A dedicated ground plane on Layer 2 ensures low-impedance returns for all sensors and clean power distribution — critical for analog microphone signal integrity.

ESP32-Multi-Sensor, from the project README
From the project README

Main components on the ESP32-Multi-Sensor

MCP73871BME280ESP32-C3-WROOM-02-H4CP2102N-A02-GQFN20RUSBLC6-2SC6W25Q32JVSSMAX4466EXK

ESP32-Multi-Sensor bill of materials (BOM)

78 components, 38 distinct parts.

QtyPartRefs
1
MCP73871
U1
1
BME280
U2
1
ESP32-C3-WROOM-02-H4
U3
1
CP2102N-A02-GQFN20R
U4
1
USBLC6-2SC6
U5
1
W25Q32JVSS
U6
1
MAX4466EXK
U7
1
TEMT6000X01
Q1
2
BC817
Q2, Q3
1
SS-52400-003
J1
1
B2B-PH-SM4-TB
J2
1
GSD090012SEU
J3
1
Conn_01x04_Pin
J4
1
Conn_01x05
J5
1
0ZCH0110AF2E
F1
1
CMC-5042PF-AC
MK1
1
BOOT
S1
1
Reset
S2
1
LM1117MPX-3.3_NOPB
VR1
1
LTST-C170TBKT
D3
Show 18 more
QtyPartRefs
2
LTST-C170KRKT
D4, D6
1
LTST-C170GKT
D5
12
0u1
C1, C2, C5, C8, C10, C13, C14, C15 +4
4
10u
C3, C4, C7, C12
4
1u
C6, C11, C19, C22
1
4u7
C9
1
10n
C17
8
10K
R1, R2, R19, R23, R30, R32, R33, R34
2
5K1
R3, R4
4
2K
R5, R6, R26, R28
6
470
R7, R8, R9, R10, R14, R18
1
1K
R11
1
22K1
R12
1
47K5
R13
4
50
R15, R16, R20, R22
2
4K7
R24, R25
2
1M
R27, R29
1
100K
R31

ESP32-Multi-Sensor design files

The KiCad project lives in the ashfaque-ur-rahman/ESP32-Multi-Sensor-PCB repository on GitHub; these links point at the commit this page was built from.

ESP32-Multi-Sensor: common questions

What microcontroller does the ESP32-Multi-Sensor use?

The ESP32-Multi-Sensor is built around the ESP32-C3-WROOM-02-H4, from the ESP32 family.

How big is the ESP32-Multi-Sensor PCB?

The ESP32-Multi-Sensor measures 90.1 × 54.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the ESP32-Multi-Sensor?

78 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the ESP32-Multi-Sensor design files?

From the ashfaque-ur-rahman/ESP32-Multi-Sensor-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ESP32-Multi-Sensor design in my own project?

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

Can I test firmware for the ESP32-Multi-Sensor 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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