# An example use case in FreeRTOS OTA
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The FreeRTOS OTA (over-the-air) agent uses AWS IoT MQTT-based file delivery to transfer FreeRTOS firmware images to FreeRTOS devices. To send the initial data set to a device, it uses the AWS IoT Job service to schedule an OTA update job to FreeRTOS devices.

For a reference implementation of an MQTT-based file delivery client, see [FreeRTOS OTA agent codes](https://docs.aws.amazon.com//freertos/latest/userguide/freertos-ota-dev.html) in the FreeRTOS documentation.