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Communicator

MattSzymonski·Hackaday2026·2025-Communicator_Badge/hardware/communicator_pcb/communicator_pcb.kicad_pcb

Communicator PCB layout, top view — open source ESP32 board by MattSzymonski
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About the Communicator PCB

Communicator is an open source ESP32 PCB design by MattSzymonski, published on GitHub. It is a 2-layer board measuring 148 × 81 mm, with 47 components from 30 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the MCP73831-2-OT, AP2112K-3.3 and TCA8418RTWR. By type, the board carries 19 resistors, 7 connectors, 7 capacitors, 4 ICs, 3 switches and 3 diodes.

Communicator, from the project README
From the project README

Main components on the Communicator

ESP32-S3-WROOM-1MCP73831-2-OTAP2112K-3.3TCA8418RTWR

Communicator bill of materials (BOM)

47 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1
U1
1
MCP73831-2-OT
U2
1
AP2112K-3.3
U3
1
TCA8418RTWR
U4
1
WIO-SX1262-N
Wio-SX1262-N
SenseCAP
M1
1
BC849
Q1
1
DMG2305
Q2
1
USB-C Connector
J1
1
1-2328702-0_UPSIDE_DOWN
1-2328702-0_upside_down
J2
1
CON-SMA-EDGE-S
J3
1
PH2.0 Connector
J4
1
Expansion
J6
1
Serial Expansion
J7
1
SIMPLE_ADDON_V2
Simple_Addon_v2
J8
1
Attenuator Bypass
JP1
1
Keyboard
SW1
1
SW_SPST
SW2
1
SLW-91353-2A-RA-D
SW3
1
Sidemount LED
D1
1
LED
D2
Show 10 more
QtyPartRefs
1
1N5819WS
D3
4
10UF
10uF
C1, C4, C5, C6
3
1UF
1uF
C7, C8, C9
2
1k
R1, R5
9
5.1K
5.1k
R2, R3, R9, R12, R13, R14, R15, R17 +1
1
1.2 k
R4
2
50 Ohm
R6, R16
1
3.9 Ohms
R7
1
2k
R8
3
100K
100k
R10, R11, R18

Communicator design files

The KiCad project lives in the MattSzymonski/Hackaday2026 repository on GitHub; these links point at the commit this page was built from.

Communicator: common questions

What microcontroller does the Communicator use?

The Communicator is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Communicator PCB?

The Communicator measures 148 × 81 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Communicator?

47 components, from 30 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Communicator design files?

From the MattSzymonski/Hackaday2026 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Communicator design in my own project?

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

Can I test firmware for the Communicator 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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