B4R Question SOLVED A way to flash a sketch without IDE in a ESP32 S3.

tigrot · 2025-10-13T16:15:57+0100

Hi everybody!
I have now a working sketch for ESP32 S3, I want to distribute binaries to my customer, not sources.
So how can I allow my customer to flash his devices? I have found no simple and practical solution to do this task. He will probably flash 10 or more devices at a time.
Does anybody have a solution?

Thank you very much!

Mauro

Cableguy · 2025-10-13T16:30:02+0100

If you have no other choice than letting the client flash then, I guess all you can do is maybe create a B4J "intaller" script type of app so that the client can run it on a computer, plug the esp usb-c port and flash it

tigrot · 2025-10-13T16:43:17+0100

Cableguy said:
If you have no other choice than letting the client flash then, I guess all you can do is maybe create a B4J "intaller" script type of app so that the client can run it on a computer, plug the esp usb-c port and flash it

Thank you. Will try this solution!

hatzisn · 2025-10-13T17:09:02+0100

Why not flashing the first time by adding also OTA update for the next times?

tigrot · 2025-10-13T17:22:28+0100

hatzisn said:
Why not flashing the first time by adding also OTA update for the next times?

This is a logger. The cpu starts every time a contact is closed. The log is generated on a IIS web server. The cpu goes to deep sleep after this task. However thank you!

tigrot · 2025-10-13T19:08:55+0100

Solved, there is an Android app on Google store. Stand alone.

Cableguy · 2025-10-13T19:09:40+0100

tigrot said:
Solved, there is an Android app on Google store. Stand alone.

care to share your finding?

tigrot · 2025-10-14T08:21:23+0100

Cableguy said:
care to share your finding?

Hi Cableguy the name of the app is "ESP32_flash" in Play Store. I have not tried it, I have to learn something more about Esp32, like memory map, the need to include bootloader and whatever can help. Using Arduino Ide I can flash the device, but this is too much automatic. I'm looking for the protocol to load my app to esp32.
There is a online utility too. https://esptool.spacehuhn.com/
Have a nice week.
Mauro

tigrot · 2025-10-14T11:54:10+0100

Closed the circle. There is a merged version of sketch binaries. To get it use a comand in arduino 2 IDE "export binaries" . It creates a directory with both merged and discrete binaries in the directory of cpp sources.
Flash the merged version at address 0x0.
I have found another utility

Flash Download Tool User Guide - ESP32 - — ESP Test Tools latest documentation

B4R Question SOLVED A way to flash a sketch without IDE in a ESP32 S3.

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