ESP32 OTA - software updates

The OTA update mechanism allows a device to update itself over IOCOM connection while the normal firmware is running.

OTA requires configuring the Partition Table of the device with at least two “OTA app slot” partitions (ieota_0 and ota_1) and an “OTA Data Partition”. The OTA operation functions write a new app firmware image to whichever OTA app slot is not currently being used for booting. Once the image is verified, the OTA Data partition is updated to specify that this image should be used for the next boot.

Note 3.7.2020: To enable rollback staging version of arduino-esp32.git needs to be installed.

platform_packages =
    framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git

The staging bestion needs that it needs “SimpleBLE” listen in platformio.ini lib_deps.

::

lib_deps =

eosal_jpeg WiFi EEPROM SimpleBLE

Links

• https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/system/ota.html
• https://github.com/scottchiefbaker/ESP-WebOTA/tree/master/src
• https://docs.platformio.org/en/latest/platforms/espressif32.html#using-arduino-framework-with-staging-version