esp32-musings / esp32_compressed_delta_ota_update Goto Github PK

Hi,

I was looking at this project to add support for OTA firmware delta compressed support to one project I'm working on and I really liked the work you have put here and started playing with the code.

Ultimately we decided to switch to a slightly modified version of bsdiff/bspatch because the esp32 has already tinfl_decompress available (in the ROM!) and so DEFLATE can be used and using that with bsdiff was simpler than with detools. Nothing wrong with heatshrink but we already used tinfl_decompress for normal full otas so we figured reuse was a good way vs heatshrink to reduce [slightly] firmware size (at the partition level at least).

If people are interested the port of bsdiff is available at https://github.com/Blockstream/esp32_bsdiff

Feel free to close if you consider this spamming :-)

Hello.

Your code is very good and useful.
But I thing you have to remplace this lines
file: [components/delta/delta.c]

flash->src = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_OTA_0, PARTITION_LABEL_SRC);
lash->dest = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_OTA_1, PARTITION_LABEL_DEST);

By this lines

flash->src = esp_ota_get_running_partition();
flash->dest = esp_ota_get_next_update_partition(NULL);