Dual CAN bus OBD-II interface for vehicle networks. Standard Edition, Hardware Revision A.
CANOpener OBD SE is a compact dual CAN bus interface that plugs into a vehicle OBD-II (OBD2) diagnostic port. It connects to two independent CAN buses and supports Classical CAN and CAN FD at up to 5 Mbps.
The board is built around an Espressif ESP32-C5-WROOM-1-N8R8 with two Texas Instruments TCAN3414 CAN transceivers. It includes onboard voltage regulation, input and CAN bus protection, an addressable RGB status LED, Boot and Reset controls, and a wireless antenna. Power it from the vehicle or from USB-C.
Order from the CAN Opener store.
Select model CO-SE to install or restore stock firmware. The latest version is selected by default. Use Chrome, Edge, or Firefox on a computer.
| MCU | Espressif ESP32-C5-WROOM-1-N8R8 |
| CAN transceivers | 2× Texas Instruments TCAN3414 |
| Interfaces | 2× Classical CAN / CAN FD |
| Max CAN data rate | 5 Mbps |
| Vehicle input | 12 V typical (up to 24 V), 0.5 A |
| USB | USB-C, 5 V, 0.5 A |
| Logic | 3.3 V |
CAN 1 is schematic channel CAN_0. CAN 2 is CAN_1.
| Function | Schematic net | GPIO |
|---|---|---|
| BOOT button | BOOT | 28 |
| RGB LED data | RGB_LED | 2 |
| CAN 1 RX | CAN_0_RXD | 0 |
| CAN 1 TX | CAN_0_TXD | 1 |
| CAN 2 RX | CAN_1_RXD | 7 |
| CAN 2 TX | CAN_1_TXD | 8 |
| CAN standby (STB) | CAN_STB | 3 |