esp_ota

OTA firmware update over HTTP/HTTPS for the ESP32 family.

Features

• OTA triggered through public API or optional AT command
• HTTP and HTTPS support via esp_https_ota
• Non-blocking background task
• Guard against concurrent OTA attempts
• Auto-restart on success
• Optional internal logs

Init policy

esp_ota_init(log_enabled, at_enabled) controls optional behavior.

• log_enabled
  • enables OTA logs
• at_enabled
  • registers AT+OTA and AT+OTA?

Network prerequisite

WiFi must already be connected before starting OTA.

Recommended companion:

• rodrigo-s-lange/esp_network

Usage

#include "esp_at.h"
#include "esp_ota.h"

nvs_flash_init();
ESP_ERROR_CHECK(esp_at_init(false));
ESP_ERROR_CHECK(esp_network_init());
ESP_ERROR_CHECK(esp_network_start());
ESP_ERROR_CHECK(esp_ota_init(false, true));

Public API

• esp_ota_init(log_enabled, at_enabled)
• esp_ota_deinit()
• esp_ota_is_initialized()
• esp_ota_is_running()
• esp_ota_start(url)

AT commands

When at_enabled=true:

• AT+OTA?
• AT+OTA
• AT+OTA="http://host/firmware.bin"

Notes

• Only one OTA session may run at a time.
• esp_ota_deinit() refuses to run while OTA is active.
• OTA task stack is 8192 bytes with priority 5.

Repository

https://github.com/rodrigo-s-lange/esp-ota