HardLabs

OkayCAN

jglim·OkayCAN·Hardware/V1.1/OkayCAN/OkayCAN.kicad_pcb

OkayCAN PCB layout, top view — open source ESP32 board by jglim

About the OkayCAN PCB

OkayCAN is an open source ESP32 PCB design by jglim, published on GitHub under the MIT license. It is a 2-layer board measuring 64.8 × 41 mm, with 32 components from 20 distinct parts.

Its main chip is the ESP32-S2-WROOM, from the ESP32 family. Other key parts include the SN65HVD230 and MT1470. By type, the board carries 11 resistors, 7 capacitors, 5 diodes, 3 ICs, 3 connectors and 2 switches.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

The okayest ESP32-S2 CAN development board

The okayest ESP32-S2 CAN development board

- Essentially an ESP32-S2 with a CAN transceiver and supporting components. - Native USB support, saving on an additional USB-UART chip. - Designed to fit a commonly available OBD enclosure and its 16-pin connectors. - Each board should cost about US$10 each when assembling about 10 boards, making it fairly affordable in small runs. - Easy to assemble/manufacture, as all components are on a single side, and most components are surface mounted. - Uses a USB-C connector, which is easier to interface when the device is installed in difficult-to-reach…

OkayCAN, from the project README
From the project README

Main components on the OkayCAN

ESP32-S2-WROOMSN65HVD230MT1470

OkayCAN bill of materials (BOM)

32 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S2-WROOM
U1
1
SN65HVD230
U2
1
MT1470
U3
1
OBD2_Connector
J1
1
TYPE-C-31-M-12
J2
1
Conn_01x04
J3
2
SW_Push
SW1, SW2
2
LED
D1, D5
2
DFLS130L
D2, D4
1
MMSZ5254C-E3-08
D3
1
10uH
L1
3
0.1uF
C1, C2, C3
1
1uF
C4
3
22uF
C5, C6, C7
2
10K
R1, R4
3
1.6K
R2, R5, R11
1
120R
R3
2
5.1K
R6, R8
2
100K
R7, R9
1
31.6K
R10

OkayCAN design files

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

OkayCAN: common questions

What microcontroller does the OkayCAN use?

The OkayCAN is built around the ESP32-S2-WROOM, from the ESP32 family.

How big is the OkayCAN PCB?

The OkayCAN measures 64.8 × 41 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OkayCAN?

32 components, from 20 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 OkayCAN design files?

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

Can I use the OkayCAN design in my own project?

Yes, under the terms of its MIT license, which jglim chose for the repository.

Can I test firmware for the OkayCAN 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.

Similar boards