This repository is used to test a http OTA update on the ESP32 in Arduino Backend.
I've used this example as base for this code: https://github.com/espressif/arduino-esp32/tree/master/libraries/Update/examples
What's the difference between the official example and this code? Well, the example uses the Updater class which is designed to work with a FileStream object. If we put in a WiFiClient stream, sometimes it throws an timeout exception. This is because the WiFiClient is dependent on external factors like a stable network connection. If there's a hickup in the connection, this example does not work.
I fixed this by caching the update first to a SD card, and finaly copy it over to the flash chip of the ESP32.
- Fileserver somewhere
- Upload json text-file to this fileserver with the following content:
{ "version": 0.2, "file": "http://ferryjongmans.nl/esp/bikeshift-node-V_02.bin" }This helps the ESP to check for new updates. And if so, it provides the url of the binary firmware file.