Datasheet¶
The hardware of WiCAN PRO in figures: the interfaces, the electrical and radio data, the protocols, the comparison with WiCAN, and the datasheet itself as a PDF to keep.
WiCAN PRO datasheet, revision 1.0 (PDF, 0.6 MB)
The figures on this page are the datasheet's. The PDF is published with the firmware, in the datasheets folder of wican-fw, where a newer revision appears first. The pins of the plug have a page of their own: Pinout.
Interfaces¶
- Processor
- Espressif ESP32-S3, dual core, 16 MB flash, 8 MB PSRAM
- OBD interpreter
- A dedicated OBD chip for every legislated OBD-II protocol, with the ELM327 v2.3, ELM329 v2.2, STN and VT instruction sets
- Buses
- Three CAN buses and one single-wire CAN (GMLAN), SAE J1850 PWM and VPW, ISO 9141-2 and ISO 14230-4 with slow and fast initialisation, see Pinout
- Wireless
- WiFi, as a station or an access point, and Bluetooth 5 LE
- USB host
- 5 V, up to 1.5 A, for a cellular modem, a GPS receiver or an Ethernet adapter, see USB accessories
- USB-C
- Firmware flashing only, see Recovery over USB. It does not power WiCAN PRO
- microSD
- Local data logging on a card of 32 GB or less, formatted FAT32, see Data logger
- Button
- One multi-function push button
- Clock
- A real-time clock that keeps the time for a short while without power
- Motion
- An accelerometer, for wake on motion, see Sleep and wake
- Firmware
- The open-source WiCAN firmware, updated over the air, see Update
Power¶
- Source
- The OBD-II port: pin 16 against pins 4 and 5, 7 V to 18 V
- USB-C
- Not a power source. WiCAN PRO has to sit in an OBD-II port to run
- Sleep
- Supported, about 3.8 mA asleep, see Sleep and wake
Radio¶
| WiFi | Bluetooth LE | |
|---|---|---|
| Standard | IEEE 802.11 b/g/n, 2.4 GHz | Bluetooth 5 LE |
| Frequency range | 2412 to 2484 MHz | 2402 to 2480 MHz |
| Transmit power, conducted | 20.5 dBm max (802.11b), 18.0 dBm (802.11g), 17.5 dBm (802.11n HT20), typical | -24.0 to +20.0 dBm |
Protocols¶
Every legislated OBD-II protocol, on passenger cars and commercial vehicles:
- ISO 15765-4 (CAN)
- SAE J1939 (CAN)
- ISO 11898 (raw CAN)
- Single-wire CAN (GMLAN)
- SAE J1850 PWM and VPW
- ISO 9141-2
- ISO 14230-4 (KWP2000)
WiCAN PRO and WiCAN¶
The datasheet's comparison with the original WiCAN, that is WiCAN OBD and WiCAN USB:
| WiCAN PRO | WiCAN | |
|---|---|---|
| USB host port | yes | no |
| Dual USB to serial | yes | no |
| Button | yes | no |
| SD card logging | yes | no |
| Interface | WiFi, BLE, USB | WiFi, BLE |
| WiCAN firmware | yes | yes |
| WireGuard VPN | yes | no |
| HTTPS | yes | HTTP only |
| MQTTS (secure MQTT) | yes | MQTT only |
| Home Assistant Nabu Casa | yes | no |
| Firmware updates, access to the latest features | full | limited |
| Improved web interface | yes | no |
| Additional reverse engineering tools | yes | no |
| RealDash CAN protocol (pins 6 and 14) | yes | yes |
| slcan and SocketCAN (pins 6 and 14) | yes | yes |
| Medium-speed CAN, MS-CAN (pins 3 and 11) | yes | no |
| GM high-speed J1962 (pins 12 and 13) | yes | no |
| Single-wire CAN, GMLAN (pin 1) | yes | no |
| SAE J1850 PWM | yes | no |
| SAE J1850 VPW | yes | no |
| ISO 9141-2 | yes | no |
| ISO 14230-4 slow and fast | yes | no |
| ELM327 instructions | v2.3 | emulation v1.5 |
| ELM329 instructions | v2.2 | no |
| STN instructions | yes | no |
| VT instructions | yes | no |
Ordering¶
| Part number | Description |
|---|---|
| MP-WICAN-PRO | WiCAN PRO OBD-II diagnostic scanner |
Datasheet revisions¶
| Revision | Date | Changes |
|---|---|---|
| 1.0 | 2026-04-18 | Initial release |