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2.1 KiB

Generate factory firmware (ESP32)

If the firmware should already contain predefined settings this guide will help you to compile these into a single binary file.

Generate default settings

First install on the requested platform the standard firmware and configure everything to your needs. Once you did all changes store them and export them to a json file.

Further prepare default settings

First create a directory data inside the following project path: src/.

As the export removes all your passwords you need to add them again to the json file. Open the json file with a text editor and search for all the "pwd":"" sections. Between the second bunch of quotation marks you have to place the password.

Note: It's recommended to keep all information in one line to save space on the ESP littlefs partition

Next rename your export file to settings.json and move it to the new created directory. It should be look similar to this:

ahoy
  |-- src
        |-- data
              |-- settings.json
        |-- config
        |-- network
        ...

build firmware

Choose your prefered environment and build firmware as usual. Once the process is finished you should find along with the standard firmware.bin an additional file called firmware.factory.bin. Both files are located here: src/.pio/build/[ENVIRONMENT]/

Upload to device

Navigate to the firmware output directory src/.pio/build/[ENVIRONMENT]/ and open a terminal or vice versa.

Python: esptool.py -b 921600 write_flash --flash_mode dio --flash_size detect 0x0 firmware.factory.bin

Windows: esptool.exe -b 921600 write_flash --flash_mode dio --flash_size detect 0x0 firmware.factory.bin

The upload should be finished within one minute.

Testing

Reboot your ESP an check if all your settings are present.

Get updated with 'Mainline'

From time to time a new version of AhoyDTU will be published. To get the changes into your already prepared factory binary generation environment you have to do only a few steps:

  1. pull new changes from remote: git pull
  2. check if the data folder is still there and contains the settings.json
  3. build and upload
  4. enjoy