[GH-ISSUE #65] Feature request: OTA with own, custom .bin #2791

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sascha_hemi · 2026-03-20T22:04:41+01:00

sascha_hemi commented

2026-03-20 22:04:41 +01:00

Originally created by @bartbh on GitHub (Jun 15, 2023).
Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/65

Is it possible to upload a custom firmware (with different pinout) to the esp32 flasher via OTA? Either by uploading it directly or via url.

The current update feature works very well, but only when using the pre-defined pinout. Or maybe storing the pin layout in a different location so it doesn't get overwritten?

Originally created by @bartbh on GitHub (Jun 15, 2023). Original GitHub issue: https://github.com/OpenEPaperLink/OpenEPaperLink/issues/65 Is it possible to upload a custom firmware (with different pinout) to the esp32 flasher via OTA? Either by uploading it directly or via url. The current update feature works very well, but only when using the pre-defined pinout. Or maybe storing the pin layout in a different location so it doesn't get overwritten?

sascha_hemi added the enhancement label 2026-03-20 22:04:41 +01:00

sascha_hemi closed this issue

2026-03-20 22:04:41 +01:00

sascha_hemi commented

2026-03-20 22:04:42 +01:00

@nlimper commented on GitHub (Jun 15, 2023):

Just for my information, what’s your reason for using a different pinout? We have precompiled environments for esp32, esp32-s2 and esp32-s3. Does your hardware differ from those?

@nlimper commented on GitHub (Jun 15, 2023): Just for my information, what’s your reason for using a different pinout? We have precompiled environments for esp32, esp32-s2 and esp32-s3. Does your hardware differ from those?

sascha_hemi commented

2026-03-20 22:04:42 +01:00

@jjwbruijn commented on GitHub (Jun 15, 2023):

The pinout is fixed, or baked in to the code, at compile time. Making it flexible would require a lot of extra clock cycles for every pin change, so that's not a great idea. Building an extra OTA method will costs extra space, which we don't have a lot of.

As @nlimper stated, there already are a bunch of supported environments, I would kindly suggest to change your pin mapping to match one of the existing environments and go from there, or make your own version with custom URL OTA support

@jjwbruijn commented on GitHub (Jun 15, 2023): The pinout is fixed, or baked in to the code, at compile time. Making it flexible would require a lot of extra clock cycles for every pin change, so that's not a great idea. Building an extra OTA method will costs extra space, which we don't have a lot of. As @nlimper stated, there already are a bunch of supported environments, I would kindly suggest to change your pin mapping to match one of the existing environments and go from there, or make your own version with custom URL OTA support

sascha_hemi commented

2026-03-20 22:04:42 +01:00

@jonasniesner commented on GitHub (Jun 16, 2023):

If you think there is a valid reason to use a different pinout, you can create a PIO config for it and it can be included in the CI/CD pipeline

@jonasniesner commented on GitHub (Jun 16, 2023): If you think there is a valid reason to use a different pinout, you can create a PIO config for it and it can be included in the CI/CD pipeline

sascha_hemi commented

2026-03-20 22:04:42 +01:00

@bartbh commented on GitHub (Jun 21, 2023):

Just for my information, what’s your reason for using a different pinout? We have precompiled environments for esp32, esp32-s2 and esp32-s3. Does your hardware differ from those?

Currently I'm using a breadboard to connect the esp32-s2 with a tag. So only the outer pins are availble for me to use.

I'll look into making my own version with custom pinout and ota url.

@bartbh commented on GitHub (Jun 21, 2023): > Just for my information, what’s your reason for using a different pinout? We have precompiled environments for esp32, esp32-s2 and esp32-s3. Does your hardware differ from those? Currently I'm using a breadboard to connect the esp32-s2 with a tag. So only the outer pins are availble for me to use. I'll look into making my own version with custom pinout and ota url.

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Reference: starred/OpenEPaperLink#2791