CAN32 - An ESP32 dev. board with CAN-Bus (V2.1)

Name: CAN32 - An ESP32 dev. board with CAN-Bus (V2.1)
SKU: 10453
Price: 44.95 USD
Availability: InStock
Rating: 3.12 (10 reviews)

(10 Reviews)

CAN-BUS + WiFi + BLE + micro SD = magic!

Designed by Fusion Tech in Czechia

CAN32 - An ESP32 dev. board with CAN-Bus (V2.1) 1

CAN32 - An ESP32 dev. board with CAN-Bus (V2.1) 2

CAN32 - An ESP32 dev. board with CAN-Bus (V2.1) 3

CAN32 - An ESP32 dev. board with CAN-Bus (V2.1) 4

CAN32 - An ESP32 dev. board with CAN-Bus (V2.1) 5

2019-09-03T00:30:13.585Z-tindie-can32.jpg

2019-09-06T11:48:00.898Z-tindie-can32-3.jpg

2019-09-03T00:34:11.090Z-F3AF167D-E9D0-4BB6-8311-CAB7664BADD6..jpeg

2019-09-03T00:34:11.090Z-BB5425A9-F23F-4874-AC95-0F9CB1249E68..jpeg

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CAN-BUS + WiFi + BLE + micro SD = magic!

The CAN32 development board is designed to allow easy projects and testing of the ESP32 in a CAN-Bus environment. This board has many features that will get you started without the need for external …

NEW GPS Motion and OLED expansion snap-on boards are now available.

Features:

Official ESP32-Wroom-32UE module on board, with CE certification
Silicon Labs CP2104 USB to UART
Maxim MAX3051 CAN-Bus transceiver
Hirose micro SD slot
USB Type-C connector
ENIG gold-plated contacts

New on V2:

ESP32u with U.Fl antenna connector (antennas available in product options)
Texas Instruments automotive synch. step down DC-DC converter 4V to 16V input, AEC-Q100 qualified
Fused ~12V input
Two user-programmable LEDs (on PWM GPIOs)
Molex connector for daughter boards (coming soon)
More GPIOs broken out

New on V2.1:

USB Type-C (backwards compatible, uses 5V only)
No buttons - Boot/reset sequence is controlled by CP2102N
Small design improvements

One of the main requirements for this dev board was a high-quality PCB (gold coated pads) and brand-name parts. Broken-out pins can be used for adding various other modules and sensors. The automotive synchronous step down DC-DC converter is able to provide 500mA @3.3V (roughly 200mA for external devices). An ESP32u with U.Fl connector allows you to connect U.Fl WiFi antennas or a U.Fl to RP-SMA-F for larger duck antennas.

All components are genuine brand-name, high quality, high-temp parts that meet or exceed recommended electrical requirements.

GPIOs/power broken out:

5V (when USB is applied)
3.3V (~300mA for on-board devices, ~200mA available for external devices)
GND
GPIO36 (SVP), GPIO39 (SVN), GPIO34, GPIO35, GPIO32, GPIO33, GPIO25, GPIO26, GPIO14, GPIO12, GPIO22 (I2C SCL), GPIO21 (I2C SDA), GPIO17 (TX), GPIO16 (RX)
another HW UART can be mapped to any pins

Four larger vias allow connection of CAN H and L, 12V (max. 16V), GND. The board can be powered via USB or vehicle battery 12V (max. 16V), but 12V is not required if powered via USB.

On-board LED to signal power (green), two user programmable cyan PWM LEDs on GPIO 13/15. LED colours may differ depending on supply.

Recommended library: https://github.com/miwagner/ESP32-Arduino-CAN Each board is tested and an blink example sketch is pre-programmed.

Note V2 board: SD Card must be ejected while programming. SD Card CS pin is GPIO2; SD.begin(2) SD Card MISO = GPIO19, MOSI = GPIO23

Note V1 board (legacy): Pull CAN RS (pin 25 / GPIO16) LOW to enable high-speed CAN. HIGH = CAN sleep mode. SD Card CS pin is 27 (GPIO17). Set this in the SDFat library variables.

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Quantity	Price
1-2	$44.95
3-4	$41.95
5+	$39.95

Review Breakdown

Average Ratings

Product: (4.10)

Documentation: (2.20)

Shipping: (3.60)

Communication: (2.60)

Mehdi | May 24, 2024

Great board

Would have appreciated more documentation but there wasn't anything surprising, my existing ESP32 code was ported over quickly with ease.

Finding a board with this exact set of features is difficult and I am pleased with the result.
The only things I would wish for is a lower consumption design and a mini SMP connector for a GPS external antenna.

#define LED_PIN 13
#define SD_CS_PIN 2
#define SD_MISO_PIN 19
#define SD_MOSI_PIN 23
#define SD_CLK_PIN 18
#define CAN_RX_PIN GPIO_NUM_4
#define CAN_TX_PIN GPIO_NUM_5
#define IMU_SDA 21
#define IMU_SCL 22

GPS is on UART2 default pins, upesy_wroom or esp32dev work for platformio

[env:can32]
platform = espressif32
board = upesy_wroom
framework = arduino
upload_speed = 1500000
board_build.flash_mode = qio
monitor_speed = 115200
monitor_dtr = 0
monitor_rts = 0
build_unflags =
-std=gnu++11
build_flags =
-DBOARD_IS_CAN32
-std=gnu++2a

Uwe | March 10, 2020

No support, no communication

I bought the CAN32 board together with the OLED extension.
The documentation is really bad and no example code is avalable.
But I finally managed to run my code on the board.
But I absolutely failed to get the OLED extension working. Paul from fusion promised me to send sample code 4 weeks ago, but even after asking for the promised code nothing happend.

So stay away from it

Uwe

Jim | Dec. 3, 2019

It won't boot unless it's being flashed, making it useless.

I bought several of these V2.1 ESP32 boards to use as prototype hardware. It works very well under both Arduino and Mongoose and is easily flashed, and it resets and starts after it is flashed. Unfortunately, applying power to the 12VDC vias provided does not cause the board to start, even from a bench supply with plenty of current available. Applying power using the USB-C port from a computer also fails, although in both cases the power LED lights. If I apply power using the USB-C port from a 2.1A wall transformer it will boot and run.

So, there seems to be a power inrush problem with the design. No schematic is provided so I can't diagnose it, and a note to the seller has gone unanswered. If I could get this board to boot I would love it. As it is, I can't make much use of it.

UPDATE: I have tried everything to make this board boot reliably. Thinking its a current inrush issue, I added a caps the Vin, u to 1000uF, no luck. I confirmed that pin IO0 is being pulled high and pin IO12 is kept low. I have tried Arduino and Mongoose. An incredible amount of time has been spent on this issue with no help from the designer. Accordingly I'm lowering the rating.

Mitch | Nov. 22, 2019

Can to BLE project (V2.1 board)

So far so good. It's been really easy to set this up in the arduino ide and get it working.

The only issue I've had so far was when my program included some SD code. I had to pull IO0 on the esp32 down myself to get it to program again even thought the CP2102N should do it for you. Can't wait to try the GPS module out next.

Thanks, Mitch

Andrea | Aug. 27, 2019

Still not able to get it working

As pointed out by others the lack of schematics and hard communication with the producer render this product startup very hard.
Moreover I'm still not able to get it working with the CAN bus I have, the producer suggestes to unsold the termination resistor - I would have preferred a jumper since configuration changes for anybody.

Andreas | Aug. 5, 2019

MicroPython not working

I bought this board in mind to program it in microPython. Flashing the latest firmware (esp32-20190805-v1.11-187-g00e7fe8ab.bin) works with no problems. But I could not see the Python REPL prompt (>>>) !

CAN work with USB connected but not with 12V. As already noted in other reviews, it would be nice to have the schematic.

Finally, I got the board to work. Here the code: https://github.com/ubx/CAN-Logger.
But then I powered it with an original Raspberry power supply (USB-C, 5.1 Volt, 3 Amps) and the board died, the USB to UARTconverter gets very hot.
But maybe just a coincidence ?

Beat | Dec. 7, 2018

I love this product ..

I hope I can figure out how to build a opcua (open62541) gateway .. maybe the chip is too small to do this but i'll try
Some example scripts on how to use the module would have made the start a little easier.

Thank's for this amazing Product!

Russell | Aug. 25, 2018

Very nice board

The shipping took a while but when it arrived I was impressed and pleased.

The notes say you have to remove the SDCard when programming but in practise I found this wasn't necessary.

The expansion connector is interesting and if it exposes an I2C interface or a UART I'd suggest adding a U-Blox SAM-M8Q daughter board as this would allow the construction of a very small CAN logger with GPS. Failing that, a battery backed RTC would be useful to add a timestamp to the logs.

Thomas | May 14, 2018

Great little device

Bought the CAN32 to play with NMEA2000 (boat can network) and the ESP32. Everything works as promised and the price is very reasonable.

As noted in other reviews, it would be helpful to have the schematic or at least more details on the connections but it has been posted since then. I had doubt about how the SDCard is connected, it is SPI and MISO/MOSI/CLOCK are 19/23/18. As noted in the other comments CS for the card is 17.

With all of this I was able to make a NMEA2000 logger that records all traffic to the SDCard (see https://github.com/ttlappalainen/NMEA2000_esp32 for the driver) in one afternoon.

Thanks for putting this product to market - I look forward to the next revision!

Chase | Jan. 13, 2018

Hardware works, but lack of documentation caused problems

I bought the CAN32 hoping that it would be an easy way to log CAN data using Arduino. Unfortunately, there is no schematic for this board or other documentation, which caused me to spend an entire weekend trying to get the CAN functionality to work. The problem was that the CAN transceiver Rs pin (mode select) was connected to pin 27 (IO16) on the ESP-WROOM-32 module and needed to be driven low, and the Arduino example code that the product page links to does not do this.
Very disappointed in the lack of simple documentation or working example code, I should not have to reverse engineer the product in order to be able to use it.