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Tsumikoro ESP32 RS-485 Bridge

theatrus·tsumikoro·hardware/bridge/bridge.kicad_pcb

Tsumikoro ESP32 RS-485 Bridge PCB layout, top view — open source ESP32 board by theatrus

About the Tsumikoro ESP32 RS-485 Bridge PCB

Tsumikoro ESP32 RS-485 Bridge is an open source ESP32 PCB design by theatrus, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 67.4 × 42.9 mm, with 30 components from 22 distinct parts.

Its main chip is the ESP32-S3-MINI-1-N8, from the ESP32 family. Other key parts include the SIT3088EEUA and LMR38020SDDAR. By type, the board carries 5 capacitors, 5 resistors, 4 ICs, 2 diodes and 1 inductor.

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

From the project

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Main components on the Tsumikoro ESP32 RS-485 Bridge

SIT3088EEUALMR38020SDDARESP32-S3-MINI-1-N8

Tsumikoro ESP32 RS-485 Bridge bill of materials (BOM)

30 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
SIT3088EEUA
3PEAK
U1, U3
1
LMR38020SDDAR
Texas Instruments
U2
1
ESP32-S3-MINI-1-N8
Espressif Systems
U4
2
S4B-XH-A(LF)(SN)
Conn_01x04_XH
JST
JBUS1, JBUS2
2
DC-005K-5A-2.0
DC-005 2.0mm
XKB Connectivity
JDC1, JDC2
1
TERM1
JPTERM1
1
TERM2
JPTERM2
1
USB-TYPE-C-019
Generic
J_USB2
2
0402WGF1002TCE
10k
UNI-ROYAL
R_BOOT2, R_EN2
2
0402WGF5101TCE
5.1k
UNI-ROYAL
R_CC1, R_CC2
1
TS-1187A-B-A-B
BOOT
XKB Connectivity
SW_BOOT2
1
TS-1187A-B-A-B
RESET
XKB Connectivity
SW_RESET2
2
MBRD10200
onsemi
D1, D2
1
FNR4030S100MT
10uH
Sunlord
L1
1
CL31B225KCHSNNE
2.2uF
Samsung
C1
1
CC0603KRX7R0BB104
100nF
Yageo
C2
1
CL05B104KO5NNNC
100nF
Samsung
C3
2
CL21A106KAYNNNE
10uF
Samsung
C4, C5
1
0402WGF1003TCE
100k
UNI-ROYAL
R1
1
0402WGF2202TCE
22k
UNI-ROYAL
R2
Show 2 more
QtyPartRefs
1
0402WGF1002TCE
10k
UNI-ROYAL
R3
2
RC1206FR-07120RL
120R
Yageo
R4, R5

Tsumikoro ESP32 RS-485 Bridge design files

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

Tsumikoro ESP32 RS-485 Bridge: common questions

What microcontroller does the Tsumikoro ESP32 RS-485 Bridge use?

The Tsumikoro ESP32 RS-485 Bridge is built around the ESP32-S3-MINI-1-N8, from the ESP32 family.

How big is the Tsumikoro ESP32 RS-485 Bridge PCB?

The Tsumikoro ESP32 RS-485 Bridge measures 67.4 × 42.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Tsumikoro ESP32 RS-485 Bridge?

30 components, from 22 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 Tsumikoro ESP32 RS-485 Bridge design files?

From the theatrus/tsumikoro 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 Tsumikoro ESP32 RS-485 Bridge design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which theatrus chose for the repository.

Can I test firmware for the Tsumikoro ESP32 RS-485 Bridge 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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