📃 Reverse Engineering an Unknown Microcontroller
As part of my work on reverse-engineering eInk price tags I ran into an interesting problem. One particular company (Samsung Electro Mechanics/SoluM) switched from a third party chip I had figured out (Marvell 88MZ100) to a new chip in their next generation tags. This chip seemed to be made by them, custom, for this purpose.
This never bodes well for reverse-engineering. A friend provided me with a few tags containing this chip to play with. There were two types that had a segment-based e-Ink display and one that had a normal graphical eInk display.
They had the same main chip on them, so I started with the segment-based device, since it is easier to understand a simpler unknown system. It was not quite clear where to start, but, of course, that kind of puzzle is always the most interesting!
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#articles #hardware #reverse
As part of my work on reverse-engineering eInk price tags I ran into an interesting problem. One particular company (Samsung Electro Mechanics/SoluM) switched from a third party chip I had figured out (Marvell 88MZ100) to a new chip in their next generation tags. This chip seemed to be made by them, custom, for this purpose.
This never bodes well for reverse-engineering. A friend provided me with a few tags containing this chip to play with. There were two types that had a segment-based e-Ink display and one that had a normal graphical eInk display.
They had the same main chip on them, so I started with the segment-based device, since it is easier to understand a simpler unknown system. It was not quite clear where to start, but, of course, that kind of puzzle is always the most interesting!
More information...
#articles #hardware #reverse
📟 Reverse Engineering the M6 Smart Fitness Bracelet
Interesting article describing the process of reverse engineering of the popular fitness bracelet.
Following a year and a half of sitting inside the house, author set out to improve his wellbeing by getting a new fitness tracker. It worked out better than he expected - hacking on it kept him busy for a couple of months - at the small price of making him sitting inside the house even harder.
Before starting, author stated his goals as follows. He wanted to:
▫️ Understand its hardware.
▫️ Figure out how to talk to it.
▫️ Dump its stock firmware.
▫️ Get it to run custom code, ideally making use of its: GPIO pins, color display, Bluetooth low energy (BLE) capabilities.
Author documented the process of going through these goals in the following article.
More information...
#reverse #hardware
Interesting article describing the process of reverse engineering of the popular fitness bracelet.
Following a year and a half of sitting inside the house, author set out to improve his wellbeing by getting a new fitness tracker. It worked out better than he expected - hacking on it kept him busy for a couple of months - at the small price of making him sitting inside the house even harder.
Before starting, author stated his goals as follows. He wanted to:
▫️ Understand its hardware.
▫️ Figure out how to talk to it.
▫️ Dump its stock firmware.
▫️ Get it to run custom code, ideally making use of its: GPIO pins, color display, Bluetooth low energy (BLE) capabilities.
Author documented the process of going through these goals in the following article.
More information...
#reverse #hardware
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