ESP32 OTA over h2

Dependencies

• ESP-IDF
• ESP32log
• h2clientserver

Features

• Upgrade firmware using a download from an HTTP/2 server
• Check if new firmware is available

Usage and setup

First of all, the software version needs to live somewhere in the software. The OTA component relies for that part on a external definition:

extern const char * VERSION;

Second, a server URL has to be configured that is used to check the latest available software version and to download the firmware blobs. This URL is defined in CONFIG_OTH2A_BASE_URL. The firmware blob naming is constructed using CONFIG_OTH2A_FIRMWARE_PREAMBLE and concattenated with `_{VERSION}.bin.

Finally a server URL Setup a server with the following file structure:

.
├── latest
├── firmware_0.0.1.bin
└── firmware_0.0.2.bin

wheras the latest file contains the current version number (that shall be downloaded) by the device and installed.

Example

#include "oth2a.h"


// in your main content
void main(){
	oth2a_initialize();

	// check if new firmware is available,
	// if so, update device and reset it.
	oth2a_handle();
}