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A repository to hold some notes around reversing the gicisky epaper image format

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Cabalist/gicisky_image_notes

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Setup instructions:

Requirements: Android Phone ADB tools

Enable Bluetooth HCI Snoop

Misc Notes

Register for the app. Google Translate on another phone is really helpful. This login will get you into the Template editor as well

Nothing seems very secure at all. It appears that I can see and read all other tags (but not write to them without being in BT range). SQL injections look like a strong possibility.

TODO: Insert adding tag to app instructions

Some important links:

Original app location

https://www.gicisky.net/app/ble-app-release-v3.0.13.apk https://www.gicisky.net/app/ble-app-release-v3.0.24.apk # <- much more responsive version of the app

Template Editor

http://a.picksmart.cn:8081

4.2 Screen is 400x300

Forward Slashes (/) are illegal in template names but it doesn't stop you from putting them in

235 lines are Black & White 235 lines are Red Lines are 512px long. This requires 234.375 lines of data on the 4.2 inch screen The last line will be 192 pixels long. Confirmed The lines don't appear to be linked in any way.

Compression (or whatever is happening) is only happening on a per line basis.

See the annotated lines in successful_img_captures/ for a breakdown of what is currently known.

Max length of GH markdown color line is 339 (no including markers)

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A repository to hold some notes around reversing the gicisky epaper image format

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