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Embedded · Advanced

OTA firmware updates for ESP32 fleets

Push firmware updates to deployed ESP32 devices with version checks, rollback safety, and a rollout path that does not depend on plugging in every board.

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Project blueprint

What you'll build

A device fleet is only production-ready when it can be maintained after deployment. This project builds an OTA update path with device identity, version reporting, staged rollout, and a recovery plan for failed updates.

The focus is on operational reliability rather than a one-off firmware flash.

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Included build referenceBuild reference — ESP32 fleet, update manifest, and rollback flow
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Project overview

Understand the build here. Learn and access the assets in the LMS.

This page covers what the project does, what you need, and how the build comes together. The LMS contains the complete lessons, source code, circuit diagrams, and deployment materials.

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Before you start

Build requirements

01ESP32 development board
02Wi-Fi network
03Firmware hosting endpoint
04Basic embedded C++ familiarity
From setup to working system

Build sequence

Follow the steps in order, verify each checkpoint, and finish with a working project you can explain and extend.

01

Add firmware version reporting

Expose the running version and device identity through the telemetry channel.

02

Build the update manifest

Define release metadata, checksums, and compatibility rules.

03

Implement the OTA client

Download, validate, and apply a new firmware image safely.

04

Add rollback behavior

Recover from interrupted downloads, invalid images, and boot failures.

05

Simulate a staged rollout

Test a small fleet update and observe device health before expanding it.

Build the next checkpoint

Stop collecting tutorials. Ship a working build.

Use this project as a concrete piece of your embedded, IoT, or edge AI portfolio.

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