Jeff Probe - Open Source JTAG by Flirc

A great little debug probe that is comparable to the official black magic probe with a less powerful mcu. The price reflects this, however.

Of course, you could always flash the BMP firmware onto a cheap stm32 dev board, but I'd rather buy this because it comes in a very compact form factor and provides the handy UART port as well.

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Keyboard Enthusiast

Neat little black magic probe

Bewertet in den USA am7. März 2020

Well made. Great price.

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lifeisafractal

No software support and missing documentation, better off with the real thing

Bewertet in den USA am20. Juni 2022

I've been doing embedded development professionally for close to two decades, and the Jeff probe looked like it might hit the spot for a very cheap SWD/JTAG adapter for embedding in automated test fixtures or giving to coworkers that don't need to program very often. The only reason I didn't get a real BlackMagic Probe was that they are out of stock everywhere (likely due to the STM32 shortage that is ongoing).

There is very little documentation on what makes this hardware different from the real BMP, and it took me longer than I care to admit to realize this is running a SAMD21, not an STM32. The creator's fork of software is extremely out of date and no longer builds in a modern Linux system. Support for the Jeff Probe was never up streamed to BMP's repos, so we can't run the latest code either. I'm sure with some hacking I could port forward to the newest BMP, but this was a stab at a $15 fix, and it looks like it didn't pay off. The creator made the statement several times on their website that it runs "the exact same firmware as the BMP" which isn't really the case as a build of their `main` doesn't support the `jeff` probe target with the SAMD21.

I totally get that it takes effort to support hardware after release, and that this feels more like a "put some open source hardware out there and see what happens" kind of things. That being said, in the current state, I couldn't recommend this to either a novice or expert unless the creator made efforts to update the software support or get support in mainline BMP.

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K A

Be preparded, some times saving a few dollars cost much more

Bewertet in den USA am14. März 2022

My nightmare started when the device arrived and my computer running Windows 11 could not see the device, it could see a device without drivers. Two hours of hunting down the tools, Zadig, and fighting to get both PID installed. Hunted down the 'firmware' then discovered in order to load it I needed a Windows version of dfu-util, they have instructions on how to compile it. After a couple more hours I finally ran dfu-util:
Device returned transfer size 4096
DfuSe interface name: "Internal Flash "
Downloading element to address = 0x08002000, size = 98716
Last page at 0x0801a19b is not writeable
And yes, he error is even misspelled,why does that not surprise me.
I'm done, $60 would have saved me hours of wasted time. I left several posts at the sellers web, nothing.

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Joseph

it doesn't detect on the device manager on windows 10

Bewertet in den USA am28. Oktober 2022

Is there any way to diagnostic this problem.
I didn't program any other f/w on it.
it is as I received. but no reflection on the device manager at all when I plug it in/out.

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John Quispe junco

sonda sin manual

Bewertet in den USA am25. Juni 2022

no hay información del modulo.

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Komal B

You will have to spend hours trying to figure out how to make this work

Bewertet in Kanada am 23. April 2024

It does not work out of the box and as some of the other reviewers pointed out, it requires a lot of figuring out and trial and error.

wish I had red the other reviews before buying it.

not worth it

Graeme

Cool.

Bewertet in Australien am 18. Februar 2023

Cheap and functional! Highly recommended.