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STM32 AWS IoT Core Bootcamp: MQTT, OTA Updates, ESP32 WIFI

Name: STM32 AWS IoT Core Bootcamp: MQTT, OTA Updates, ESP32 WIFI
Rating: 4.6 (43 reviews)

Build Step-by-Step STM32 and ESP32 AWS IoT Core Applications with MQTT, OTA, and Payment Gateway Integration

Created byFastBit Embedded Brain Academy, Kiran Nayak, Fastbit Embedded Technologies

Last updated 3/2026

English

What you'll learn

Set up and configure AWS IoT Core for secure device-to-cloud communication
Connect STM32 microcontrollers to the internet using ESP32 Wi-Fi module with AT commands
Publish sensor data and subscribe to commands over MQTT
Implement secure Over-the-Air (OTA) firmware updates using AWS IoT Jobs and Amazon S3
Integrate IoT devices with real-world business logic (e.g., payment gateway events)
Build end-to-end IoT applications with real hardware and cloud workflows

Course content

5 sections • 48 lectures • 4h 31m total length

Introduction3:13
Build STM32 and ESP32 based IoT applications on AWS IoT Core using MQTT, with a secure STM32–ESP32 bridge, real-time data exchange, OTA updates, and cloud-to-device interactions across multiple projects.
Hardware and software requirements1:50
Course repository0:03

Project objective0:53
Connect a secure STM32 application to AWS IoT Core via MQTT, subscribe to a topic, and publish real-time temperature and humidity data.
AWS IoT core setup6:08
Learn how to set up AWS IoT Core by creating an AWS account, generating certificates and keys, configuring a policy, and attaching it to an IoT thing for secure MQTT.
Creating an AWS IoT Thing and Policies13:12
Create an AWS IoT thing and attach a policy for connect, publish, subscribe, and receive. Download certificates and keys, then flash the ESP32 with the firmware to connect securely.
Building and Flashing ESP-32 AT Firmware12:04
Creating a new STM32 Project for this application5:01
Configuring essential peripherals to communicate with ESP329:12
Establish secure connection to AWS IoT core10:48
Establish a secure AWS IoT Core connection by initializing the ESP32 Wi-Fi module, joining the AP, syncing time with SNTP, and MQTT TLS over port 8883 using the thing name.
Testing device connecting to AWS MQTT broker5:12
MQTT Publish Task Implementation (Part 1)10:04
MQTT Publish Task Implementation (Part 2)3:34
Start the FreeRTOS scheduler, flash the device, and test the MQTT publish task; verify temperature and humidity data arrive at AWS IoT Core in Mumbai.
MQTT Publish Task Implementation (Part 3)4:42
MQTT Publish Task Implementation (Part 4)8:55
MQTT Receive Task Implementation (Part 1)2:21
MQTT Receive Task Implementation (Part 2)1:34
Create three RTOS tasks for mqtt publish, mqtt receive, and a low-priority mqtt send and receive task to handle at commands via queues, with implementation in the next video.
MQTT Command Handling Task Implementation10:20
Testing : MQTT Publish and Receive4:53

Big picture of the project5:26
Introduction1:25
Build a secure over-the-air firmware update system for an STM32 IoT device using AWS IoT services, enabling the device to check for pending updates and upgrade via the OTA bootloader.
Create Amazon S3 bucket5:42
Create IAM role and IoT stream7:40
Create an IAM role with S3 read access for AWS IoT to fetch firmware, then create an IoT stream using OTA-stream with S3 bucket name, object key, and role ARN.
Creating a custom job6:09
Testing OTA firmware update application4:51
Understanding OTA Update Process10:47
Understanding OTA handle function for incoming MQTT messages6:03
Building OTA application firmware5:27
Uploading new firmware over the air9:28
Perform an over-the-air firmware update by changing the app to publish every 10 seconds, then upload the binary to s3, create an iot stream, and run a custom ota job.

Project introduction1:59
Block diagram of the project2:22
Razorpay Setup - Creating and Configuring the Webhook4:05
AWS Cloud Setup - Lamda, API Gateway, DynamoDB9:57
Set up the AWS cloud backend for Razorpay webhooks by creating a Lambda function, configuring API gateway triggers, validating signatures, and storing transactions in DynamoDB.
Project Creation & OLED Pin Setup7:55
QR code generation3:52
Displaying QR code on the OLED and Testing5:18
Capturing payment event on the device5:48
Subscribe the device to the razor pay payments mqtt topic to receive payment events. Parse json payload to extract payment id, amount, status, and time, then display on the oled.
Testing payment event capture (End-to-End)5:35

Introduction1:26
build a smart sticker system with stm32 and esp32 wifi that fetches live headlines from the new york times api via http get and displays them on an oled.
Block diagram3:48
NYT Account Setup and API Key Generation3:32
Project Creation & BTN Pin Setup3:32
Create a new project from a template, remove mqtt and pre-rtos code, and set up wifi plus oled with http/https logic, configuring left and right buttons on the fastbit shield.
Establishing Server Connection to NYT6:09
Designing Application FSM & Startup State5:01
Building Menu UI and Button Interaction6:26
Implementing Fetch State – Requesting News from API9:12
Implementing Scroll and Error States – Testing8:20
Implement a pixel-based scrolling ticker on the OLED display by building a scroll string from article titles and updating at 25 ms, with no news error state returning to menu.
Next videos coming soon0:14

Requirements

Basics 'C' programming knowledge
Basic microcontroller knowledge
Basic knowledge of FreeRTOS (tasks, queues)

Description

Are you ready to take your STM32 and IoT skills to the next level by building real cloud connected devices on AWS?

This is a brand new course that is practice first, project driven, and step by step. You will not just learn concepts. You will build along and see your STM32 devices come alive with real AWS IoT Core integration..

In this hands on, project driven course, you will learn how to connect your STM32 microcontrollers to the AWS IoT Cloud and build real world IoT applications that are secure, reliable, and scalable.

Connect STM32 to AWS IoT Core using ESP32 Wi Fi bridge, publish and control devices with MQTT, deliver secure OTA firmware updates, and integrate Razorpay payment events in hands on projects

This is not a theory heavy course. It is all about building step by step, where you will write code, configure cloud services, and see your embedded device interact with AWS in real time.

By the end, you will have the skills to implement IoT systems that go beyond simple sensor readings, integrating with advanced features such as firmware updates over the air and even cloud driven business logic with payment gateways.

What you will learn?

How to set up AWS IoT Core for secure device-to-cloud communication
Connecting STM32 with ESP32 as a Wi-Fi bridge using AT commands
Publishing sensor data and receiving commands over MQTT
Implementing secure Over-the-Air firmware updates using AWS IoT Jobs
Managing cloud-to-device messaging and real-time responses
Integrating IoT with real-world business systems (Razorpay Payment Gateway)
Building end-to-end IoT workflows from device → cloud → device

Hardware Requirements

Note: If you already have a microcontroller development board, we recommend continuing with it. This course is designed with such thoroughness that the concepts and steps can be applied to most development boards though some minor adjustments may be needed. But, if you prefer to use the exact same board as the instructor for a smoother experience, you can check out the recommended hardware

Any STM32 Nucleo board with Fastbit IOT connect shield (Recommended)

Any STM32 development board + ESP32 module for Wi-Fi

Projects you build

IoT Foundation Project – Connect STM32 to AWS, publish sensor data, and subscribe to commands using MQTT
OTA Firmware Updates – Deliver new firmware securely from AWS S3 and update in the devices automatically.
IoT + Payment Gateway – React to real-time Razorpay payment confirmations on your STM32 device with instant feedback on OLED display.

Who this course is for?

Embedded engineers who want to connect their devices to the cloud
Students or professionals interested in IoT product development
Makers who want to build practical IoT projects beyond basics
Anyone curious about how embedded devices interact with AWS IoT Core

Requirements

Basic knowledge of C programming and STM32 development
Familiarity with UART and microcontroller basics
An STM32 development board + ESP32 module for Wi-Fi

By the end of this course, you will be able to:

Confidently connect STM32 devices to AWS IoT Core
Build real-world, cloud-integrated IoT applications
Deliver OTA firmware updates securely
Integrate IoT devices with modern digital services

Who this course is for:

Anyone who wants to learn and apply embedded systems programming with real-world IoT applications.

STM32 AWS IoT Core Bootcamp: MQTT, OTA Updates, ESP32 WIFI

What you'll learn

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Course content

Introduction3 lectures • 5min

Project-001: MQTT Publish and Subscribe using AWS and STM32 + ESP3216 lectures • 1hr 49min

Project 002 : OTA Firmware Update10 lectures • 1hr 3min

Project-003: IoT based payment system9 lectures • 47min

Project 004: IoT News Ticker10 lectures • 48min

Requirements

Description

Who this course is for: