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Fusion Tech

1,057 orders since Feb 07, 2016

Brno, JM, Czechia

Ships from Czechia.

Custom Work Available

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As of July 2025, our products are exempt from import duties and de minimis fees into the US. Feel free to contact us for updates.

Overall Rating:

Review Breakdown

5
11 4
11 3
5 2
10 1
4

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Average Ratings

Product: (4.29)

Documentation: (3.22)

Shipping: (3.78)

Communication: (3.32)

All Reviews

Trevor | May 29, 2025

Good board, needs more documentation

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

The board is a good board so far. It needs to be better documented for the GPIO setup and the hardware. It took a long time to figure out there was a 120 ohm termination resistor on the CAN interface. A jumper (or option to order the board without it) would be much appreciated. At a minimum a photo showing where it is so it is easy to identify when trying to remove it.

EDIT: Of my two boards, they will not boot on 12V. Both boot from USB just fine.
EDIT 2: OK, I have figured out the issue with the 12V powering the board. If anything is being externally powered from the boards 3.3v pin, the ESP32 will fail to boot. Seems like an issue in the regulator not handling the inrush current. In my case I am only powering a 16mA opto-isolator, so well within what should be able to be handled. Without diving into the board's power delivery design, I am thinking something needs to be done to better handle the inrush current on boot to ensure stable voltage.
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Response from Fusion Tech | May 29, 2025
Hi Trevor,
Thanks for the review!
I will update the documentation with information about the termination resistor.

Paul

Mehdi | May 24, 2024

Great board

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

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

Elias | Sept. 20, 2021

Great minimalist wallet for nerds

For The Void Wallet()

Bought this to replace my ridge wallet clone. It's actually thinner than my old wallet and doesn't have a money clip, so it's flatter. It looks awesome and I can't wait to show it off to my programmer friends. One of the PCB plates did have a small scratch on it, but I don't mind because it's going to be in my pocket with my keys, so it's probably going to get scratched anyway. Getting cards out of it does seem more awkward than the ridge wallet, but I haven't used it much yet so I'm probably just not used to it. This ships from the Czech Republic and I'm in the USA, so it took 4 weeks to arrive (this was during covid, so overseas shipping is generally much slower than normal). But don't let any of that dissuade you, it's an awesome little wallet and I would definitely recommend it!
Avatar
Response from Fusion Tech | Sept. 20, 2021
Thanks, Elias! Really glad you like the wallet.
Shipping has indeed been atrocious during covid :(

Isaac | June 30, 2021

Excellent product, love the small size!

For Dual CAN-Bus adapter for Teensy 3.5, 3.6

The only Teensy CAN adapter there is -- and the best! These little boards solder right on and give you dual (or single) CAN busses. Installation is easy and they work great. Integrated termination resistors make everything neat.

Remapping CAN0 is a bit of a pain, an example of setting it up with the FlexCAN library would be great to have on the page here.
Also note that leaving Rs floating will cause slightly strange behaviour. If it's pulled to positive, it is effectively in 'normal' mode where there is no speed limitation on the drive transistors; grounding it shuts off the drive transistors altogether but leaves the receiving hardware powered up; but doing neither of those allows the resistance between the pin and 3.3v to control the slope (effectively the output power) of the output drivers.
So basically just pull it to 3.3 unless you're doing something special.
Avatar
Response from Fusion Tech | July 7, 2021
Thank you for your review, Isaac!

Mitch | Nov. 22, 2019

Can to BLE project (V2.1 board)

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

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

Beat | Dec. 7, 2018

I love this product ..

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

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!

Mohammed | Sept. 20, 2018

is there a diagram how to connect it ?

For Dual CAN-Bus adapter for Teensy 3.5, 3.6

I have got the dual can-bus on teensy and everything is soldiered, i have been trying to make it work using the recommended library but still no luck!!,
is there a way to show how to connect it ? i Tried using CAN0 and CAN1 and the alternativeCAN0.

is there way that shows how to get it done and how to make it work please that will be so helpful.

Thanks in advance
Avatar
Response from Fusion Tech | Sept. 20, 2018
Hi Mohammed,

Please contact me via the “Ask a question button” on the product page.
Also one of the pictures on that page shows a connection diagram. Please make sure to connect CAN-H, CAN-L and ground as well.

Cheers,
Paul

Thomas | May 14, 2018

Great little device

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

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!

Jon | Nov. 1, 2017

Best dual-CAN adapter out there.

For Dual CAN-Bus adapter for Teensy 3.5, 3.6

Bought this for sniffing traffic on industrial CAN networks and some car hacking on the side. Can't get any smaller, and is a perfect fit on the Teensy 3.6.
The seller is in the Czech Republic, so if you are a US buyer like me, be patient. He shipped my order off very quickly, but our wonderful USPS made sure to add the delays in. Nothing at all to do with the seller.
Arrived, soldered up, and worked perfectly on the first try using an example sketch from the recommend library. The dual CAN is already proving very useful - I was logging frames from two buses running at two different baud rates, simultaneously.
My only regret at this point is not buying several of these. The Teensy plus CAN is a great combination, especially if you plan to get creative with your vehicle bus.

Dylan | Jan. 4, 2017

Great Quality

For 12mm and 16mm Antivandal RGB "Colorpixel" Buttons

I looked all over to find a small RGB metal button that came in low quantities and in high quality. It works great for what I need it to do and it took a month for it to come in from the day I placed my order.
My review:

Pros:
-Great Size
-Nice vibrant colors
-smooth operation
Cons:
- It's common cathode and not common anode (harder to use with led controllers, so I have to convert it)
-PCB pads could be bigger or easier to solder too.

I would recommend it!

William | June 15, 2016

Well built! Fits exactly on my Teensy 3.2! Will be buying mo

For Teensy 3.2/4.0/LC slim micro SD card adapter

This is a really nifty add-on for the Teensy. Well built, sturdy, Definitely in keeping with the extremely small size philosophy of those who work with Teensy-related products. I plan on buying more, when I get onto the next project.

I didn't want to rate the documentation, as none provided. There is a very nice discussion of this in Paul S's Teensy Wiki pages, which is all I needed.