Comments on: The CANable: a small USB to CAN adapter

By: Neil Emiro

Neil Emiro — Sat, 20 Sep 2025 18:59:37 +0000

Ethan, I know this is long since a passed project for you. I am still using CANable devices. I recently tried to get it working on an 83.3kbps bus, and while CANgaroo is showing it connected, it is not passing any traffic. I can plainly see that the data is there on an oscope. If I change the programming of my circuit to 125kbps, it works fine, but I am trying to interface down at the lower speed. Is there a setting I am missing? Putting the termination resistor in or out does not make a difference. Thanks!

By: Techlobo

Techlobo — Thu, 04 Aug 2022 05:31:11 +0000

Ethan, does the CANtact BUSMASTER fork work with the Candlelight firmware or does it need SLCAN?

By: Burns

Burns — Tue, 09 Jul 2019 02:13:48 +0000

In reply to Ethan Zonca.

Thanks for the response, Ethan. No worries. I actually finally did get it to work. I think that my problem was actually with slcan and the filters I had set up in the 3.3V device. (I had required a 29-bit ID in the filter, but did not realize that I needed leading zeros in cansend to make it do 29-bits)

Thanks again for the help…

By: Ethan Zonca

Ethan Zonca — Tue, 09 Jul 2019 01:57:26 +0000

In reply to Burns.

Hey! Just saw your comment–sorry for the delayed response. The CANable should work great with a 3v3 bus, I have used it in several applications without issue. I would check the usual suspects: proper bus termination and the canbus bitrate. If you need more detailed help, you can email me directly at support@canable.io

By: Burns

Burns — Wed, 26 Jun 2019 20:49:51 +0000

Ethan, thanks a million for this board! It worked great for testing with a 5V CAN bus, but now I’m working with a 3.3V bus, and despite TI saying everything is compatible, the CANable does not seem to understand sent messages. Of course, I might have screwed up. Have you had any experience with CANable and 3.3V CAN?

By: Johnny

Johnny — Mon, 03 Dec 2018 18:00:20 +0000

In reply to Johnny. Ok meanwhile i fixed the "NotFoundError: No device selected." by going to "chrome://flags/#enable-experimental-web-platform-features" and enable the usb-backend. this way i could find the stmBootloader and it shows that it is paired. but afteri try to connect i get the "SecurityError: Access denied.", although i run chrome as an admin.

By: Johnny

Johnny — Mon, 03 Dec 2018 07:41:05 +0000

In reply to Johnny. Thanks for the reply Ethan. Unfortunately the update-site gives me the feedback, that no compatible device could be found. When i plug it in in boot-mode, my device manager recognizes a STM device in DFU mode, which should be correct. Do you know why the updater does not work? Greetings Johnny

By: Ethan Zonca

Ethan Zonca — Sat, 24 Nov 2018 19:00:08 +0000

In reply to Johnny. Hey Johnny, There was an issue in the firmware that caused that problem. I've released a fixed version of the firmware alongside an online updater tool. You can try it out here; let me know if you run into any issues! Note that you must be running Google Chrome to use the online updater. Choose the "slcan" firmware in the dropdown (it should be the default) https://canable.io/updater/. Thanks, Ethan Zonca

By: Johnny

Johnny — Fri, 23 Nov 2018 09:08:55 +0000

Hey Ethan, very cool project, thanks for that.
I have a little problem. I can completetly track my canbuses via the candump command(standard & extended format).
But when i try to cansend via the canable it stops working. It only recognizes the messages i sended but not the rest anymore. Bringing the interface down and up again does not work. The only way to get candump working is to disconnect and reconnect the power supply. Do you know what could cause this error?

By: liviu

liviu — Sun, 10 Dec 2017 17:28:39 +0000

Hi, does this or the original cantact supports can packets with ID of 29bits?