Hot-swap TZ offset with browser locale in firmware binary

Open thebentern opened this issue 1 year ago • 3 comments

Flow in bash: sed -i 's/tzplaceholder /CST6CDT,M3.2.0,M11.1.0\x0/' firmware.bin truncate --size=-32 firmware.bin sha256sum firmware.bin | xxd -r -ps >> firmware.bin

Oct 03 '24 20:10 thebentern

https://github.com/nayarsystems/posix_tz_db/blob/master/zones.csv

Oct 03 '24 20:10 thebentern

We will need to ask esptool to generate a byte of checksum, and replace the 33rd byte from the end of the file. Then the last 32 bytes can be trimmed and replaced with the sha256sum.

Oct 03 '24 20:10 jp-bennett

Rak4631 doesn't need any hashing or checksum modifications. Just overwrite the placeholder bytes with the right string and null-terminate it. RP 2040 still to be checked.

Oct 04 '24 02:10 jp-bennett