esp32_ota

OTA application for FW upgarde, controlled via MQTT messages MQTT broker URL is defined in mqtt_ctrl.c

#define CONFIG_BROKER_URL

esp32_ota subscribes to "ota[xx]/ctrl" topic where [xx] is the device number defined by

#define CTRTL_DEV_ID //in project_specific.h

It requires "factory" and "ota_0" partionons to be present in partition table
To perform OTA uprade of the firmware in partition "ota_0":

1. ensure the device is booted in factory mode
2. publish "ota <URL to new FW>" message in "ota[xx]/ctrl" topic
3. wait for "Image validation OK" log message
4. publish "boot ota_0" in "ota[xx]/ctrl" topic (set boot to "ota_0" partition)
5. publish "restart" in "ota[xx]/ctrl" topic
   

Now the device should boot the new FW from ota_0