HardLabs

IOT-THING

gathonjia-ndungu·IOT-THING

IOT-THING PCB layout, top view — open source ESP32 board by gathonjia-ndungu

About the IOT-THING PCB

IOT-THING is an open source ESP32 PCB design by gathonjia-ndungu, published on GitHub. It is a 4-layer board measuring 95 × 88.1 mm, with 59 components from 31 distinct parts.

Its main chip is the ESP32-WROOM-32D, from the ESP32 family. Other key parts include the USBLC6-2P6, CP2104, Si7021-A20, 74AHCT245 and TLV117LV-3.3V. By type, the board carries 20 resistors, 15 capacitors, 6 ICs, 6 connectors, 4 diodes and 3 transistors.

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

From the project

Overview Developed a custom, compact 4-layer PCB centered around the ESP32-WROOM-32 microcontroller. This project integrates robust power management, industrial switching capabilities, and high-speed USB communication, designed for reliable performance in IoT environments.

A custom, compact 4-layer PCB design centered around the ESP32-WROOM-32 for robust IoT applications.

This project presents the comprehensive design files for a custom, compact 4-layer Printed Circuit Board (PCB). Engineered around the versatile ESP32-WROOM-32 microcontroller, this board is purpose-built for reliable performance in diverse IoT environments. It integrates advanced power management, industrial-grade switching capabilities, and high-speed USB communication, making it an ideal foundation for sophisticated embedded solutions. The design prioritizes compactness, robustness, and…

Main components on the IOT-THING

ESP32-WROOM-32DUSBLC6-2P6CP2104Si7021-A2074AHCT245TLV117LV-3.3V

IOT-THING bill of materials (BOM)

59 components, 31 distinct parts.

QtyPartRefs
1
ESP32-WROOM-32D
U1
1
USBLC6-2P6
U2
1
CP2104
U3
1
Si7021-A20
U4
1
74AHCT245
U5
1
TLV117LV-3.3V
U6
2
UMH3N
Q1, Q2
1
BC817
Q3
1
USB_C_Receptacle_USB2.0_16P
J1
1
Conn_01x04
J2
1
Screw_Terminal_01x03
J3
1
Screw_Terminal_01x08
J4
1
Screw_Terminal_01x02
J5
1
Conn_02x05_Odd_Even
J6
1
Fuse
F1
1
Polyfuse_Small
F2
1
RT314A05
K1
1
SW_SPST
SW1
1
LL4148
D1
2
LED
D2, D4
Show 11 more
QtyPartRefs
1
LED_RGBA
D3
1
BLM21PG221
FB1
1
1000U/25V
C1
6
22u
C2, C5, C7, C8, C10, C11
1
4u7
C3
7
100n
C4, C6, C9, C12, C13, C14, C15
2
5K
R1, R2
4
10K
R3, R8, R13, R20
6
22R
R4, R5, R16, R17, R18, R19
6
1K
R6, R7, R9, R10, R14, R15
2
4u7
R11, R12

IOT-THING design files

The KiCad project lives in the gathonjia-ndungu/IOT-THING repository on GitHub; these links point at the commit this page was built from.

IOT-THING: common questions

What microcontroller does the IOT-THING use?

The IOT-THING is built around the ESP32-WROOM-32D, from the ESP32 family.

How big is the IOT-THING PCB?

The IOT-THING measures 95 × 88.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the IOT-THING?

59 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the IOT-THING design files?

From the gathonjia-ndungu/IOT-THING repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the IOT-THING design in my own project?

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

Can I test firmware for the IOT-THING 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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