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Wi se opi4

depau·wi-se-hw·wi-se-opi4/wi-se-opi4.kicad_pcb

Wi se opi4 PCB layout, top view — open source ESP32 board by depau
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About the Wi se opi4 PCB

Wi se opi4 is an open source ESP32 PCB design by depau, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 20.1 × 26.5 mm, with 33 components from 20 distinct parts.

Its main chip is the ESP-WROOM-02, from the ESP32 family. Other key parts include the AMS1117-3.3. By type, the board carries 14 resistors, 7 capacitors, 4 diodes, 2 ICs, 2 transistors and 2 connectors.

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

From the project

Cheap and tiny ESP8266 boards for Wi-Se to access your SBC or router serial port remotely

Wi-Se is a set of ESP8266-based boards intended to be used with Wi-Se (firmware).

They are intended to be always connected to a device's UART header in order to troubleshoot boot issues or crashes without having to take the board out of the case.

Provides solder jumpers to configure the header output. It can be powered from 5V or 3.3V.

Compatible with Raspberry Pi and all boards with a compatible pinout. Runs on 5V.

Wi se opi4, from the project README
From the project README

Main components on the Wi se opi4

AMS1117-3.3ESP-WROOM-02

Wi se opi4 bill of materials (BOM)

33 components, 20 distinct parts.

QtyPartRefs
1
AMS1117-3.3
U1
1
ESP-WROOM-02
U2
2
SS8050-G
Q1, Q2
1
UART
J1
1
Side
J2
1
RESET
SW1
1
BOOT0
SW2
1
BLUE
D1
1
AMBER
D2
1
RED_TX
D3
1
RED_RX
D4
1
10u
C1
2
10u
C2, C5
1
0u1
C6
3
0u1
C7, C8, C9
1
1k5
R1
3
2k2
R2, R3, R4
6
10k
R5, R6, R7, R8, R9, R14
2
1k
R10, R13
2
1k
R11, R12

Wi se opi4 design files

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

Wi se opi4: common questions

What microcontroller does the Wi se opi4 use?

The Wi se opi4 is built around the ESP-WROOM-02, from the ESP32 family.

How big is the Wi se opi4 PCB?

The Wi se opi4 measures 20.1 × 26.5 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Wi se opi4?

33 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Wi se opi4 design files?

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

Can I use the Wi se opi4 design in my own project?

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

Can I test firmware for the Wi se opi4 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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