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So I decided to start building an open source hardware wallet....specifically for Denarius (D) I decided upon the ESP32 platform chip due to its powerful feature set enabling the use of cryptographic functions and cheap cost. We have options of Wifi and Bluetooth if needed, though the focus will be around not enabling these on the board. The code is very basic as this is my first time with playing with MCUs and development micro controller boards. Everything will be released in due time as well as this post updated, this thread will serve as a historical and discussion venue. Some early prototyping with a breadboard + ESP32 Dev Board + 128x32 OLED display Some serial console output of some transaction signing attempts on chip
How to update keepkey firmware in Windows. If you don't have a keepkey, use Carsen's referral link and go buy one https://amzn.to/2CUvQvk Download the updater - https://beta.shapeshift.com/updater-download# Run and wait for No Device Connected screen. Plug in keepkey, click Update Now. Select your option. Mine is new so This Keeykey is New. Unplug the keeykep, plug it back in while holding down the button. Hold down the button. Looks like this on device. Hold the button down until that arrow on the keepkey itself turns into a checkmark. On reconnect the bootloader will update. Hold down button and reconnect. Now time to update firmware. Click Update Now. Hold down the button again and wait for the checkmark, do not unplug yet. Unplug the keeykep and plug back in. And now its all updated. Reconnect while holding the button down to check firmware. All done.