What You’ll Learn

🔧

ESP32 Fundamentals

Master the ESP32 architecture, development environment, and core concepts

📡

Wireless Communication

Implement WiFi, Bluetooth, and other wireless protocols for IoT connectivity

🌐

Network Protocols

Learn TCP/IP, HTTP, MQTT, and other networking protocols for IoT applications

🔌

Hardware Interfaces

Work with sensors, actuators, and various communication interfaces

☁️

Cloud Integration

Connect devices to cloud platforms and build scalable IoT solutions

🏭

Industrial Protocols

Implement industrial communication protocols for automation systems

Prerequisites

✓ Basic programming knowledge
✓ Understanding of electronics concepts
✓ Familiarity with C/C++
✓ A Computer
✓ Some ESP32 Development Boards like ESP32-DevkitC-32E
✓ (Optional) Some Sensors

Course Syllabus

Volume 1: Getting Started and FreeRTOS Foundations

Start your ESP32 journey by setting up the ESP-IDF and VS Code. This volume covers the framework architecture, your first Hello World project, and the fundamentals of the ESP32's memory and boot process. You'll finish with a solid introduction to FreeRTOS concepts like tasks and scheduling.
25 chapters Chapters 1-25

Volume 2: Connectivity Fundamentals – WiFi

Master the ESP32's WiFi capabilities, from protocol basics to implementing Station and Access Point modes. Learn to handle connection events, manage multiple networks, and create powerful, self-healing ESP-MESH networks for large-scale device deployments.
25 chapters Chapters 26-50
  • 26
    WiFi Protocol Fundamentals Understand the core concepts of the WiFi protocol (802.11). Learn about WiFi standards, operations, and terminology essential for ESP32 connectivity.
  • 27
    WiFi Station Mode Basics Learn how to configure the ESP32 to connect to an existing WiFi network (Access Point) in Station (STA) mode using the ESP-IDF WiFi driver.
  • 28
    WiFi Station Connection Flow Understand the step-by-step process of an ESP32 connecting to a WiFi network in station mode, including scanning, authentication, and obtaining an IP.
  • 29
    WiFi Auto-connect and Reconnection Strategies Implement robust WiFi auto-connect and reconnection mechanisms on ESP32 to automatically rejoin networks after disconnects or reboots.
  • 30
    Handling WiFi Connection Events Learn to handle various WiFi events (connected, disconnected, got IP) in your ESP32 application using the ESP-IDF event loop system.
  • 31
    WiFi Access Point Mode Configuration Configure the ESP32 to act as a WiFi Access Point (AP), allowing other devices to connect directly to it. Set SSID, password, and channel.
  • 32
    WiFi AP Client Management Learn how to manage clients connected to the ESP32 when operating in Access Point (AP) mode. Monitor connections and disconnect clients.
  • 33
    Combining Station and AP Modes (APSTA) Implement simultaneous WiFi Station (STA) and Access Point (AP) modes on the ESP32 (APSTA). Connect to a network while also hosting one.
  • 34
    WiFi Scanning Implementation Learn how to perform WiFi scans using the ESP32 to discover nearby Access Points. Retrieve SSID, signal strength (RSSI), and security information.
  • 35
    Advanced WiFi Scan Features and Filtering Explore advanced ESP32 WiFi scanning options, including passive scans, specific channel scans, and filtering results based on SSID or BSSID.
  • 36
    Managing Multiple WiFi Networks Implement logic on the ESP32 to store credentials for multiple WiFi networks and attempt connections based on availability or priority.
  • 37
    WiFi Network Diagnostics Learn techniques to diagnose WiFi connectivity issues on the ESP32, including checking signal strength, pinging gateways, and analyzing event logs.
  • 38
    WiFi Roaming Techniques Explore basic WiFi roaming concepts for ESP32, enabling devices to switch between Access Points in the same network for better connectivity.
  • 39
    WiFi Power Saving Modes Utilize WiFi power-saving modes (Modem Sleep) on the ESP32 to reduce power consumption while maintaining network connectivity. DTIM intervals explained.
  • 40
    WiFi WPS Implementation Implement Wi-Fi Protected Setup (WPS) on the ESP32 for easy and secure connection to WPS-enabled routers using push-button or PIN methods.
  • 41
    WiFi Protected Setup and SmartConfig Explore ESP32 provisioning methods like WPS and Espressif’s SmartConfig (ESP-TOUCH) to easily configure WiFi credentials on new devices.
  • 42
    WiFi Enterprise Authentication Connect ESP32 devices to enterprise WiFi networks using WPA2/WPA3-Enterprise authentication methods like EAP-TLS, EAP-TTLS, and PEAP.
  • 43
    WiFi WPA3 Security with ESP-IDF Implement the latest WPA3 security standard on ESP32 for enhanced WiFi network protection, including SAE (Simultaneous Authentication of Equals).
  • 44
    Custom WiFi Event Handlers Develop custom event handlers for fine-grained control over WiFi events on the ESP32, extending the default ESP-IDF event loop behavior.
  • 45
    WiFi Provisioning Methods for ESP32 Overview of various WiFi provisioning methods for ESP32, including SmartConfig, BLE provisioning, AP mode provisioning, and web server methods.
  • 46
    ESP32 WiFi Mesh Networking Introduction to ESP-MESH, Espressif’s WiFi Mesh networking protocol for ESP32. Create self-healing, large-scale wireless networks.
  • 47
    Root Node Configuration in Mesh Networks Learn how to configure the root node in an ESP-MESH network, which acts as the gateway between the mesh and an external IP network (like the internet).
  • 48
    Internal Node Management in Mesh Networks Understand how internal nodes function within an ESP-MESH network on ESP32. Learn about node discovery, routing, and data forwarding.
  • 49
    Mesh Network Diagnostics and Healing Explore tools and techniques for diagnosing ESP-MESH network issues on ESP32. Understand self-healing mechanisms and network maintenance.
  • 50
    WiFi Performance Optimization Techniques Learn techniques to optimize WiFi performance on ESP32, including antenna selection, buffer tuning, protocol choices, and minimizing interference.

Volume 3: Connectivity – Bluetooth and Advanced Networking

Dive into Bluetooth with a comprehensive look at both Classic (for audio streaming) and Low Energy (BLE). Learn to build GATT servers and clients, manage security, and implement beacons. This volume also covers ESP-NOW for direct device-to-device communication and strategies for WiFi/Bluetooth coexistence.
25 chapters Chapters 51-75
  • 51
    Bluetooth Classic Introduction and Architecture The fundamentals of Bluetooth Classic (BR/EDR) on ESP32. Explore its architecture, profiles (SPP, A2DP), and common use cases like audio streaming.
  • 52
    Bluetooth SPP Profile Implementation The Serial Port Profile (SPP) for Bluetooth Classic on ESP32, enabling transparent serial communication between devices wirelessly.
  • 53
    Bluetooth A2DP Sink Implementation Configure the ESP32 as a Bluetooth A2DP Sink to receive and play high-quality stereo audio streamed from devices like smartphones or laptops.
  • 54
    Bluetooth A2DP Source Implementation Implement Bluetooth A2DP Source functionality on ESP32 to stream audio wirelessly to Bluetooth speakers or headphones. Transmit audio from ESP32 to others.
  • 55
    Bluetooth HFP Implementation Explore the Hands-Free Profile (HFP) for Bluetooth Classic on ESP32, enabling features like call handling and voice communication.
  • 56
    Bluetooth LE Architecture Overview Introduction to Bluetooth Low Energy (BLE) on ESP32. Understand its architecture, key concepts (GATT, GAP), and advantages for low-power IoT devices.
  • 57
    BLE GATT Server Implementation Learn to implement a BLE GATT Server on ESP32. Define custom services and characteristics to expose data and functionality to BLE clients.
  • 58
    BLE GATT Services and Characteristics Deep dive into defining BLE GATT services and characteristics on an ESP32 server. Understand UUIDs, properties (read, write, notify), and descriptors.
  • 59
    BLE GATT Client Implementation Implement a BLE GATT Client on ESP32 to discover services/characteristics on remote BLE servers and interact with them (read, write, subscribe).
  • 60
    BLE Security Levels and Pairing BLE security mechanisms on ESP32, including pairing methods (Just Works, Passkey Entry), bonding, and different security levels for connections.
  • 61
    BLE Bonding and Device Management Learn how to manage bonded BLE devices on ESP32. Store and retrieve bonding keys for faster and secure reconnections without re-pairing.
  • 62
    BLE Advertising Configurations Configure BLE advertising parameters on ESP32. Control advertising intervals, data packets (manufacturer data, service UUIDs), and discoverability modes.
  • 63
    BLE Scanning and Filtering Implement BLE scanning on ESP32 to discover nearby advertising devices. Apply filters based on address, service UUIDs, or advertising data content.
  • 64
    BLE Beacons and iBeacon Implementation Turn your ESP32 into a BLE Beacon. Implement common formats like Apple’s iBeacon or Google’s Eddystone to broadcast information wirelessly.
  • 65
    BLE Battery Service Implementation Implement the standard BLE Battery Service (BAS) on ESP32 to report the device’s battery level to connected BLE clients like smartphones.
  • 66
    BLE HID Device Implementation Configure the ESP32 as a BLE Human Interface Device (HID), emulating keyboards, mice, or game controllers to interact with computers or mobiles.
  • 67
    BLE MIDI Implementation Implement BLE MIDI on ESP32 to send and receive MIDI messages wirelessly, enabling interaction with musical instruments and software synthesizers.
  • 68
    BLE Performance Optimization Techniques to optimize BLE performance on ESP32, including connection parameters, MTU size negotiation, and efficient data transfer strategies.
  • 69
    Dual-mode Bluetooth Applications (Classic + LE) Develop applications on ESP32 that utilize both Bluetooth Classic (BR/EDR) and Bluetooth Low Energy (BLE) simultaneously for diverse connectivity needs.
  • 70
    ESP-NOW Protocol for Direct Device Communication ESP-NOW, Espressif’s connectionless low-power protocol for direct ESP32-to-ESP32 communication without needing a WiFi router or AP.
  • 71
    ESP-NOW with WiFi Coexistence Usage of ESP-NOW concurrently with WiFi on the ESP32. Manage channel usage and potential interference for reliable coexistence.
  • 72
    ESP-NOW Security Implementation Security features for ESP-NOW communication on ESP32, including pairing and data encryption, to protect direct device interactions.
  • 73
    ESP-NOW Range Optimization Techniques to optimize the communication range of ESP-NOW on ESP32, including antenna choice, power settings, and protocol timing.
  • 74
    ESP-NOW Multi-device Networks Multi-device networks using ESP-NOW on ESP32, enabling star, tree, or mesh-like topologies for flexible device communication patterns.
  • 75
    Bluetooth and WiFi Coexistence Strategies Strategies for managing Bluetooth (Classic/LE) and WiFi coexistence on ESP32 to minimize interference and ensure reliable performance.

Volume 4: Advanced Networking and Internet Protocols

Advance your networking skills by delving into core internet protocols like IPv4 and IPv6. Learn to implement DHCP, DNS, and mDNS, and get a thorough grounding in TCP, UDP, and raw socket programming. Build robust web connectivity with HTTP/HTTPS clients and WebSockets.
25 chapters Chapters 76-100
  • 76
    Ethernet Interface on ESP32 Variants Learn how to use the Ethernet MAC/PHY interface available on specific ESP32 variants for wired network connectivity. Configuration and usage examples.
  • 77
    IPv4 Networking Fundamentals Review IPv4 fundamentals relevant to ESP32 development, including IP addressing, subnets, gateways, and the basic structure of IP packets.
  • 78
    IPv6 Implementation and Configuration Implement and configure IPv6 networking on ESP32. Understand IPv6 addressing (SLAAC, DHCPv6), neighbor discovery, and its benefits for IoT.
  • 79
    Dual-stack IPv4/IPv6 Applications Develop ESP32 applications capable of operating on both IPv4 and IPv6 networks simultaneously using a dual-stack implementation.
  • 80
    DHCP Client Implementation Implement a DHCP client on ESP32 to automatically obtain an IP address, subnet mask, gateway, and DNS server information from a DHCP server.
  • 81
    DHCP Server Implementation Configure the ESP32 to act as a DHCP server, assigning IP addresses and network configuration to clients connecting to its network (e.g., in AP mode).
  • 82
    DNS Client Implementation Implement a DNS client on ESP32 to resolve domain names (like www.google.com) into IP addresses needed for establishing network connections.
  • 83
    DNS Server and DNS-SD Implementation Set up a basic DNS server on ESP32 and implement DNS-Based Service Discovery (DNS-SD) for advertising and discovering network services locally.
  • 84
    mDNS and Service Discovery Utilize multicast DNS (mDNS) on ESP32 for zero-configuration service discovery on local networks (like Apple’s Bonjour). Find devices and services easily.
  • 85
    TCP Socket Programming Basics Learn the fundamentals of TCP socket programming on ESP32 using the LwIP stack. Create reliable, connection-oriented communication channels.
  • 86
    TCP Advanced Features and Options Explore advanced TCP features and socket options on ESP32, including keepalive, Nagle’s algorithm, window scaling, and error handling.
  • 87
    UDP Socket Programming with ESP32 Implement UDP socket programming on ESP32 for connectionless, datagram-based communication. Suitable for applications where speed matters over reliability.
  • 88
    Raw Socket Implementation in ESP-IDF Learn advanced raw socket programming on ESP32 to craft and receive custom IP packets, bypassing the standard TCP/UDP transport layers.
  • 89
    Socket Options and Configurations Deep dive into various socket options (setsockopt/getsockopt) available in LwIP on ESP32 for fine-tuning TCP, UDP, and IP behavior.
  • 90
    Asynchronous Socket Programming in ESP-IDF Implement asynchronous socket operations on ESP32 using callbacks or event-driven models to handle network I/O without blocking application tasks.
  • 91
    Non-blocking Socket I/O with ESP-IDF Utilize non-blocking socket modes on ESP32 to perform network reads and writes without halting task execution, improving application responsiveness.
  • 92
    Multicast and Broadcast Communication Implement IP multicast and broadcast communication on ESP32 using UDP sockets to efficiently send data to multiple recipients simultaneously.
  • 93
    HTTP Client Implementation in ESP-IDF Learn to make HTTP requests (GET, POST, etc.) from your ESP32 using the ESP-IDF HTTP client library to interact with web servers and APIs.
  • 94
    HTTPS with TLS/SSL in ESP-IDF Secure your ESP32’s HTTP communications using HTTPS (HTTP over TLS/SSL). Learn certificate handling and secure connection establishment.
  • 95
    Certificate Management and Verification Understand TLS/SSL certificate management on ESP32, including storing root CAs, client certificates, and performing server certificate verification.
  • 96
    WebSocket Client Implementation Implement a WebSocket client on ESP32 for persistent, full-duplex communication channels with WebSocket servers, enabling real-time data exchange.
  • 97
    WebSocket Server Implementation Create a WebSocket server on the ESP32, allowing multiple clients to establish persistent connections for real-time, bidirectional communication.
  • 98
    SNTP and Time Synchronization Synchronize the ESP32’s internal clock with network time servers using the Simple Network Time Protocol (SNTP) for accurate timekeeping.
  • 99
    Network Diagnostics and Troubleshooting Utilize tools and techniques like ping, traceroute (conceptual), and LwIP statistics on ESP32 for network diagnostics and troubleshooting connectivity issues.
  • 100
    Custom Network Protocol Development Learn the principles of developing custom network protocols on top of TCP or UDP for specific application requirements on the ESP32.

Volume 5: IoT Protocols and Cloud Connectivity

Connect your ESP32 to the cloud. This volume focuses on essential IoT protocols like MQTT and CoAP. You'll learn to integrate your devices with major platforms like AWS IoT Core and Azure IoT Hub, and discover powerful tools like ESP RainMaker and the concept of digital twins.
25 chapters Chapters 101-125
  • 101
    MQTT Protocol Fundamentals Understand the Message Queuing Telemetry Transport (MQTT) protocol. Learn its publish/subscribe model, key concepts, and suitability for IoT on ESP32.
  • 102
    MQTT Client Implementation with ESP-MQTT Implement an MQTT client on ESP32 using the ESP-MQTT component. Connect to brokers, publish messages, and subscribe to topics for IoT communication.
  • 103
    MQTT QoS Levels and Message Persistence Explore MQTT Quality of Service (QoS) levels 0, 1, and 2 on ESP32. Understand message delivery guarantees and persistence mechanisms.
  • 104
    MQTT Authentication Methods Secure your ESP32’s MQTT connections using various authentication methods, including username/password and client certificate authentication.
  • 105
    MQTT TLS Security Implementation Implement MQTT over TLS/SSL on ESP32 to encrypt communication between the device and the MQTT broker, ensuring data confidentiality and integrity.
  • 106
    MQTT Topic Design Patterns Learn best practices for designing effective MQTT topic structures for your ESP32-based IoT applications. Organize data flow efficiently.
  • 107
    MQTT Last Will and Testament Utilize the MQTT Last Will and Testament (LWT) feature on ESP32 to notify other clients or systems if a device disconnects ungracefully.
  • 108
    MQTT Retained Messages in ESP-IDF Understand and use MQTT retained messages on ESP32. Allow new subscribers to immediately receive the last known good value for a specific topic.
  • 109
    MQTT Bridges and Proxies with ESP-IDF Learn about MQTT bridges and proxies and how they can be used in ESP32 IoT deployments to connect different brokers or networks.
  • 110
    MQTT Advanced Message Patterns Explore advanced MQTT messaging patterns like request/response over MQTT, suitable for command-and-control scenarios with ESP32 devices.
  • 111
    HTTP/HTTPS RESTful Client Implementation Implement RESTful API clients on ESP32 using HTTP/HTTPS. Interact with web services, send data, and retrieve information securely.
  • 112
    HTTP/HTTPS Server Implementation Create an HTTP or secure HTTPS web server on the ESP32 to serve web pages, provide APIs, or enable local device configuration and control.
  • 113
    RESTful API Design and Implementation Learn principles of designing and implementing RESTful APIs directly on the ESP32, enabling interaction via standard HTTP methods.
  • 114
    Building Web Interfaces for ESP32 Develop simple web interfaces (HTML, CSS, JS) hosted on the ESP32’s web server for device monitoring, configuration, and control via a browser.
  • 115
    CoAP Protocol Implementation Implement the Constrained Application Protocol (CoAP) on ESP32, a lightweight UDP-based protocol designed for constrained IoT devices and networks.
  • 116
    CoAP Resource Discovery in ESP-IDF Learn how CoAP resource discovery works on ESP32, allowing clients to find available resources (sensors, actuators) on a CoAP server.
  • 117
    CoAP Block-wise Transfers Implement CoAP block-wise transfers on ESP32 to handle the transmission of large amounts of data over UDP in smaller, manageable blocks.
  • 118
    CoAP Observe Pattern in ESP-IDF Utilize the CoAP Observe pattern on ESP32, allowing clients to subscribe to resource changes on a server and receive notifications automatically.
  • 119
    Protocol Buffers on ESP32 Use Protocol Buffers (protobuf) on ESP32 for efficient data serialization. Define data structures and encode/decode them for network transmission.
  • 120
    AWS IoT Core Integration for ESP32 Connect your ESP32 devices securely to AWS IoT Core using MQTT. Manage devices, send telemetry, and receive commands from the AWS cloud platform.
  • 121
    Azure IoT Hub Integration with ESP-IDF Integrate ESP32 devices with Microsoft Azure IoT Hub using MQTT or AMQP. Leverage Azure services for device management, data ingestion, and analytics.
  • 122
    ThingsBoard IoT Platform Integration Learn to connect ESP32 devices to the ThingsBoard IoT Platform using MQTT. Send telemetry, manage device attributes, handle Remote Procedure Calls (RPCs).
  • 123
    ESP RainMaker Cloud Integration Utilize Espressif’s ESP RainMaker platform for simplified ESP32 cloud connectivity, device management, OTA updates, and mobile app integration.
  • 124
    Building Custom Cloud Backends Understand the considerations for building custom cloud backends to support your ESP32 IoT applications, focusing on protocols and architecture.
  • 125
    Implementing Device Shadows and Digital Twins Learn how to implement device shadows or digital twins for ESP32 devices using cloud platforms (AWS, Azure) or custom backends for state synchronization.

Volume 6: Peripherals and Interfaces

Master the ESP32's hardware peripherals. This volume covers working with analog signals using ADC/DAC, communicating with sensors via I2C, SPI, and UART, and controlling devices with the RMT (for IR and NeoPixels), PWM, and built-in capacitive touch sensors.
25 chapters Chapters 126-150
  • 126
    ADC Configuration and Reading with ESP32 Learn to configure and read analog values using the ESP32’s Analog-to-Digital Converter (ADC). Interface with analog sensors effectively.
  • 127
    Advanced ADC Techniques and Calibration Explore advanced ESP32 ADC features, including attenuation settings, multi-sampling for noise reduction, and calibration for improved accuracy.
  • 128
    DAC Output and Waveform Generation Utilize the ESP32’s Digital-to-Analog Converter (DAC) to output analog voltage levels and generate simple waveforms like sine or square waves.
  • 129
    I2C Bus Configuration and Communication Learn to configure and use the I2C (Inter-Integrated Circuit) communication protocol on ESP32 to interface with sensors and peripheral ICs.
  • 130
    I2C Multiple Device Management Manage communication with multiple devices sharing the same I2C bus on the ESP32. Understand addressing and bus arbitration concepts.
  • 131
    I2C Advanced Error Handling Implement robust error handling for I2C communication on ESP32, detecting issues like NACKs, bus errors, and timeouts for reliable operation.
  • 132
    SPI Interface Implementation with ESP-IDF Learn to configure and use the Serial Peripheral Interface (SPI) on ESP32 for high-speed communication with peripherals like displays, SD cards, and sensors.
  • 133
    SPI Multiple Device Management Manage communication with multiple SPI slave devices connected to the ESP32 using separate Chip Select (CS) lines. Control data flow effectively.
  • 134
    SPI DMA Transfers with ESP32 Utilize Direct Memory Access (DMA) with the ESP32’s SPI controller for high-throughput data transfers without significant CPU intervention.
  • 135
    UART Communication Basics with ESP-IDF Implement basic Universal Asynchronous Receiver/Transmitter (UART) serial communication on ESP32 for debugging, logging, or interfacing with other devices.
  • 136
    UART Advanced Features with ESP-IDF Explore advanced ESP32 UART features like hardware flow control (CTS/RTS), parity checking, multiple stop bits, and event handling.
  • 137
    UART DMA Mode for ESP32 Use DMA with the ESP32 UART controller for efficient background serial data transmission and reception, freeing up the CPU for other tasks.
  • 138
    I2S Audio Interface of ESP32 Learn to use the I2S (Inter-IC Sound) interface on ESP32 for digital audio input and output. Interface with codecs, DACs, and microphones.
  • 139
    I2S Digital Microphone Integration Connect and read data from digital I2S microphones (like PDM or MEMS microphones) using the ESP32’s I2S peripheral for audio capture applications.
  • 140
    I2S Audio Codec Integration with ESP-IDF Interface the ESP32 with external audio codec ICs via the I2S bus for high-quality audio playback and recording capabilities.
  • 141
    RMT (Remote Control) Module of ESP32 Explore the ESP32’s versatile Remote Control (RMT) peripheral for generating and receiving precisely timed pulse trains, ideal for IR or custom protocols.
  • 142
    RMT for Infrared Communication Use the ESP32 RMT module to decode signals from infrared (IR) remote controls and transmit IR commands to control devices like TVs or air conditioners.
  • 143
    RMT for WS2812/NeoPixel LED Control Drive addressable RGB LEDs like WS2812 (NeoPixels) using the ESP32 RMT peripheral, creating complex lighting effects with precise timing.
  • 144
    PWM Signal Generation with ESP32 Generate Pulse Width Modulation (PWM) signals on ESP32 GPIO pins to control the brightness of LEDs, the speed of motors, or generate analog-like outputs.
  • 145
    LED PWM Controller (LEDC) of ESP32 Utilize the dedicated LEDC peripheral on ESP32 for high-resolution, hardware-accelerated PWM generation, ideal for smooth LED fading and control.
  • 146
    Capacitive Touch Sensors of ESP SoCs Use the ESP32’s built-in capacitive touch sensor peripherals. Detect touch events on GPIO pins without additional hardware for simple user interfaces.
  • 147
    USB Implementation in ESP32 Series Discover USB capabilities of different ESP32 SoCs using tinyUSB and ESP-IDF v5.x. Learn Device Types, descriptors and other USB specifications.
  • 148
    LCD/OLED Display Integration with ESP-IDF Interface various types of LCD and OLED displays (using I2C or SPI) with the ESP32. Display text, graphics, and sensor data visually.
  • 149
    Camera Interface and ESP32-CAM Learn to use the camera interface on ESP32 variants (like ESP32-CAM). Capture images and stream video for surveillance or computer vision projects.
  • 150
    SD Card and SDIO Interface Interface SD cards with the ESP32 using SPI or the dedicated SD/MMC (SDIO) peripheral for large-scale data logging and file storage.

Volume 7: Peripherals Part 2 and Automotive Protocols

Explore specialized hardware interfaces with a focus on automotive and industrial systems. This volume introduces the TWAI (CAN bus) controller for in-vehicle communication (OBD-II), the MCPWM for advanced motor control, and the Pulse Counter for reading encoders.
25 chapters Chapters 151-175
  • 151
    TWAI (Two-Wire Automotive Interface) Introduction Intro to ESP32’s TWAI controller for CAN bus communication. Learn basics of the Two-Wire Automotive Interface, its applications, and benefits.
  • 152
    TWAI Configuration and Setup Configure ESP32 TWAI controller: set bit timing, operating modes (Normal, Listen-Only), and initialize for CAN bus communication.
  • 153
    CAN Frame Transmission and Reception Learn sending and receiving CAN frames (standard & extended IDs) using ESP32 TWAI. Handle data payloads and message arbitration on the bus.
  • 154
    CAN Message Filtering and Acceptance Implement hardware acceptance filters for ESP32 TWAI to efficiently process relevant CAN messages and ignore others, reducing CPU load.
  • 155
    CAN Error Handling and Recovery Understand CAN bus error states (Error Active, Passive, Bus-Off) and implement error detection and recovery mechanisms using ESP32 TWAI.
  • 156
    Automotive Diagnostics with CAN (OBD-II) Use ESP32 TWAI to interface with OBD-II systems in vehicles. Read diagnostic trouble codes (DTCs) and real-time sensor data via CAN.
  • 157
    CAN-FD Implementation on ESP32 Explore CAN with Flexible Data-Rate (CAN-FD) on compatible ESP32s. Learn benefits of higher data throughput and larger payloads with TWAI.
  • 158
    J1939 Protocol Implementation with ESP-IDF Implement the SAE J1939 protocol for heavy-duty vehicle communication on ESP32 using the TWAI controller. Handle PGNs and addressing.
  • 159
    CANopen Protocol Basics Introduction to CANopen higher-layer protocol on ESP32. Understand SDOs, PDOs, and object dictionary concepts for industrial automation.
  • 160
    SDM (Sigma-Delta Modulation) Overview Learn about ESP32’s Sigma-Delta Modulation (SDM) peripheral. Generate high-resolution PWM-like signals for DAC or motor control applications.
  • 161
    SDM Configuration and Usage Configure and use the ESP32 SDM peripheral. Set prescalers, duty cycles, and output GPIOs for generating precise sigma-delta modulated signals.
  • 162
    Motor Control Unit (MCPWM) Fundamentals ESP32’s Motor Control PWM (MCPWM) unit. Understand its features for advanced motor control, including complementary PWM and dead time.
  • 163
    MCPWM for Brushless DC Motor Control Use ESP32 MCPWM to control Brushless DC (BLDC) motors. Implement commutation logic, speed control, and feedback using Hall sensors.
  • 164
    MCPWM Dead Time and Fault Detection Configure dead time insertion with ESP32 MCPWM to prevent shoot-through in H-bridges. Implement fault detection for robust motor control.
  • 165
    Pulse Counter (PCNT) Module Utilize ESP32’s Pulse Counter (PCNT) peripheral to count external digital pulses from encoders, flow meters, or other pulse-generating sensors.
  • 166
    Encoder Interface with PCNT Interface quadrature encoders with ESP32 using the PCNT module. Decode direction and count pulses for precise position and speed sensing.
  • 167
    Temperature Sensor Integration with ESP32 Integrate the ESP32’s built-in temperature sensor. Learn how to read raw values and convert them to Celsius or Fahrenheit for monitoring.
  • 168
    Parallel IO (ParIO) Interface Explore ESP32’s Parallel IO (ParIO) interface for high-speed parallel data transfer, suitable for LCDs, cameras, or custom parallel buses.
  • 169
    LCD Interface with ParIO Drive parallel LCD displays (e.g., 8-bit or 16-bit) using ESP32’s ParIO interface for faster refresh rates compared to SPI or I2C.
  • 170
    Camera Interface with ParIO Use ESP32 ParIO for interfacing with parallel camera sensors (e.g., DVP cameras) for image data capture and processing applications.
  • 171
    Advanced Timer Groups (TIMG) ESP32’s Timer Group (TIMG) peripherals. Configure general-purpose timers for precise timing, event generation, and watchdog functions.
  • 172
    System Timer (SYSTIMER) Usage Utilize the high-resolution SYSTIMER peripheral on ESP32 for accurate timekeeping, scheduling, and synchronization across system events.
  • 173
    eFuse Programming and Management Learn about ESP32 eFuses for permanent configuration storage (MAC address, security settings). Understand programming and read-only bits.
  • 174
    Secure eFuse Usage with ESP-IDF Explore secure usage of ESP32 eFuses for features like Flash Encryption key storage, Secure Boot enablement, and disabling debug interfaces.
  • 175
    Random Number Generator (RNG) Use ESP32’s hardware Random Number Generator (RNG) for cryptographic applications, security protocols, and generating unpredictable values.

Volume 8: Industrial Communication Protocols

Integrate your ESP32 projects into industrial automation systems. This volume covers common industrial protocols, including Modbus (RTU & TCP/IP), RS-485/RS-422, CANopen, PROFINET, EtherCAT, and OPC UA, preparing you for complex SCADA and control applications.
25 chapters Chapters 176-200
  • 176
    Modbus RTU Protocol Introduction Learn Modbus RTU basics for ESP32. Understand serial communication, master-slave architecture, and data models for industrial devices.
  • 177
    Modbus RTU Master Implementation Implement a Modbus RTU Master on ESP32 to poll slave devices, read registers, and write coils for industrial control and monitoring.
  • 178
    Modbus RTU Slave Implementation Configure ESP32 as a Modbus RTU Slave device. Respond to master requests, manage data registers, and emulate industrial sensors/actuators.
  • 179
    Modbus TCP/IP Implementation Implement Modbus TCP/IP on ESP32 for communication over Ethernet or WiFi. Encapsulate Modbus frames within TCP packets for IP networks.
  • 180
    Modbus Gateway Implementation Build a Modbus Gateway using ESP32 to bridge Modbus RTU (serial) networks with Modbus TCP/IP (Ethernet/WiFi) networks seamlessly.
  • 181
    RS-485 Interface Implementation Interface ESP32 with RS-485 transceivers for robust, long-distance serial communication in noisy industrial environments. Handle half-duplex.
  • 182
    RS-422 Full-Duplex Communication Implement RS-422 full-duplex serial communication with ESP32 for point-to-point or multi-drop industrial applications requiring higher data rates.
  • 183
    DNP3 Protocol Basics with ESP-IDF Introduction to DNP3 (Distributed Network Protocol) for ESP32. Understand its use in utility automation (electric, water) and SCADA systems.
  • 184
    BACnet Protocol Implementation Explore BACnet (Building Automation and Control Networks) on ESP32. Integrate devices into building management systems (BMS) over IP or MS/TP.
  • 185
    LonWorks Protocol Integration Learn about LonWorks protocol integration with ESP32 for building and industrial automation, focusing on its peer-to-peer communication model.
  • 186
    PROFIBUS-DP Implementation Introduction to implementing PROFIBUS-DP slave functionality on ESP32 (with external ASIC/FPGA) for factory automation and process control.
  • 187
    PROFINET Protocol Basics Understand PROFINET IO basics for ESP32. Explore Industrial Ethernet for real-time automation, device models, and communication services.
  • 188
    EtherCAT Slave Implementation Learn about implementing EtherCAT slave devices with ESP32 (typically requiring dedicated EtherCAT slave controllers) for high-performance automation.
  • 189
    DeviceNet Protocol Implementation Explore DeviceNet, a CAN-based industrial network, and its potential implementation aspects with ESP32 for sensor/actuator networks.
  • 190
    AS-Interface (AS-i) Implementation Introduction to AS-Interface (AS-i) for simple binary sensor and actuator networking, and how ESP32 could interface with AS-i gateways.
  • 191
    IO-Link Master Implementation Implement an IO-Link Master on ESP32 to communicate with smart IO-Link sensors and actuators for point-to-point digital communication.
  • 192
    HART Protocol Communication with ESP32 Learn to communicate with HART (Highway Addressable Remote Transducer) field devices using ESP32, often via HART modems or gateways.
  • 193
    Foundation Fieldbus Implementation Overview of Foundation Fieldbus (H1, HSE) and integration to ESP32 into such process automation networks, likely via gateways.
  • 194
    SERCOS III Protocol Integration Introduction to SERCOS III, an Ethernet-based real-time interface for motion control, and how ESP32 might interact in SERCOS systems.
  • 195
    CC-Link Protocol Implementation Explore CC-Link family of industrial networks (CC-Link, CC-Link IE) and potential ESP32 integration for factory automation in Asia.
  • 196
    Ethernet/IP Protocol Basics Understand Ethernet/IP fundamentals for ESP32. Learn about CIP objects and implicit/explicit messaging for industrial automation over Ethernet.
  • 197
    OPC UA Client Implementation Implement an OPC UA Client on ESP32 to securely connect and exchange data with OPC UA Servers in industrial M2M communication scenarios.
  • 198
    OPC UA Server Implementation Develop an OPC UA Server on ESP32 to expose its data and services securely to OPC UA Clients, enabling interoperability in industrial systems.
  • 199
    SNMP Agent Implementation Implement an SNMP Agent on ESP32 to allow network management systems to monitor and control the device using the Simple Network Management Protocol.
  • 200
    Industrial Protocol Gateway Design Design principles for building versatile industrial protocol gateways using ESP32, translating between different fieldbuses and Ethernet protocols.

Volume 9: Building Automation and Lighting Control Systems

Specialize in building and lighting automation. This volume covers key protocols like DMX512, Art-Net, DALI, and KNX. You'll also explore 1-Wire and EnOcean to create sophisticated, interconnected systems for smart buildings, including HVAC and access control.
25 chapters Chapters 201-225

Volume 10: Advanced ESP-IDF Features

Optimize your applications for performance, memory, and security. This volume covers advanced FreeRTOS concepts, dual-core programming (SMP), and the Ultra Low Power (ULP) co-processor. Learn critical security features like Flash Encryption and Secure Boot, plus advanced debugging.
25 chapters Chapters 226-250
  • 226
    Stream Buffers and Message Buffers Use FreeRTOS stream buffers and message buffers on ESP32 for efficient, thread-safe byte stream or discrete message passing between tasks and ISRs.
  • 227
    Critical Sections and Interrupt Handling Master advanced interrupt handling and critical section management in FreeRTOS on ESP32 to protect shared data and ensure system stability.
  • 228
    SMP and Dual-Core Programming Leverage the dual-core architecture of many ESP32 variants using Symmetric Multiprocessing (SMP) features in FreeRTOS for parallel execution.
  • 229
    Task Affinity and Core Pinning Control which CPU core (0 or 1) specific FreeRTOS tasks run on using task affinity settings (core pinning) on dual-core ESP32s for optimization.
  • 230
    Inter-Processor Communication Implement Inter-Processor Communication (IPC) mechanisms on dual-core ESP32s to allow tasks running on different cores to exchange data and signals.
  • 231
    Stack Usage Analysis and Optimization Analyze and optimize FreeRTOS task stack usage on ESP32 to prevent stack overflows and minimize RAM consumption in memory-constrained applications.
  • 232
    Advanced Heap Management Strategies Explore advanced heap memory management techniques on ESP32, including using multiple heap regions (e.g., internal RAM vs. PSRAM) and heap tracing.
  • 233
    Static vs. Dynamic Memory Allocation Understand the trade-offs between static and dynamic memory allocation (heap) in ESP32 FreeRTOS applications. Choose the right strategy for your needs.
  • 234
    Flash Encryption Implementation Secure your ESP32 application firmware and data stored in flash memory by implementing ESP-IDF’s transparent flash encryption feature.
  • 235
    Secure Boot Implementation in ESP-IDF Implement Secure Boot on ESP32 to ensure that only authenticated and authorized firmware can run on the device, preventing malicious code execution.
  • 236
    Digital Signature & Certificate Management Utilize digital signatures for firmware verification and manage TLS/SSL certificates securely on the ESP32 for authenticated communication.
  • 237
    Hardware Security Module Usage Explore the use of hardware security features or external Secure Elements with ESP32 for enhanced cryptographic operations and key storage.
  • 238
    ESP32 PSRAM Configuration and Usage Configure and utilize external Pseudo-Static RAM (PSRAM) with ESP32 variants that support it to significantly expand available memory for applications.
  • 239
    ULP (Ultra Low Power) Co-processor Programming Introduction to the ESP32’s Ultra Low Power (ULP) co-processor. Learn how it can perform simple tasks while the main CPUs are in deep sleep.
  • 240
    ESP32 ULP Assembly Programming Learn the basics of programming the ESP32 ULP co-processor using its specific assembly language to perform tasks like sensor readings in deep sleep.
  • 241
    ULP Sensor Monitoring Applications Develop applications where the ESP32 ULP co-processor monitors sensors (e.g., via I2C or ADC) and wakes the main CPU only when necessary.
  • 242
    RTC Memory Usage in ESP-IDF Utilize the ESP32’s RTC (Real-Time Clock) slow memory to store small amounts of data that persist across deep sleep cycles.
  • 243
    Watchdog Timers Implementation Implement both the Interrupt Watchdog Timer (IWDT) and Task Watchdog Timer (TWDT) on ESP32 to detect and recover from software hangs or freezes.
  • 244
    Advanced DMA Operations in ESP32 Explore advanced Direct Memory Access (DMA) capabilities on ESP32 beyond basic peripheral usage, potentially for memory-to-memory transfers.
  • 245
    Custom Bootloader Development for ESP32 Learn the process and considerations involved in developing a custom second-stage bootloader for the ESP32, replacing the default ESP-IDF bootloader.
  • 246
    Advanced Partition Management in ESP32 Understand advanced ESP32 flash partition table management, including creating custom layouts, defining OTA partitions, and managing NVS/FAT partitions.
  • 247
    Partition Encryption Techniques Explore techniques for encrypting specific flash partitions (like NVS or SPIFFS) on the ESP32, complementing full flash encryption.
  • 248
    Power Management Framework in ESP-IDF Dive deeper into the ESP-IDF power management framework. Configure dynamic frequency scaling (DFS) and manage power locks for optimal energy use.
  • 249
    ESP-IDF Component Testing Framework Utilize the ESP-IDF unit testing framework (Unity) to write and run tests for your custom components and application logic directly on the ESP32.
  • 250
    Custom Exception and Crash Handlers Implement custom exception handlers and crash dump analysis routines on ESP32 to gather more detailed information when software failures occur.

Volume 11: ESP32 Variants

Navigate the diverse family of ESP32 SoCs (Original, S2, S3, C3, C6, H2). This volume details the architectural differences, from CPU cores (Xtensa vs. RISC-V) to connectivity (WiFi 6, Thread, Zigbee) and unique peripherals, helping you choose the perfect chip for any project.
25 chapters Chapters 251-275
  • 251
    ESP32 Original Series Architecture Details Deep dive into the architecture of the original ESP32 (WROOM, WROVER) series. Understand its dual-core Xtensa LX6 CPUs, peripherals, and memory map.
  • 252
    ESP32-S2 Architecture and Differences Explore the ESP32-S2 architecture: single-core Xtensa LX7, enhanced security features, USB OTG, and differences compared to the original ESP32.
  • 253
    ESP32-S3 Architecture and Differences Discover the ESP32-S3: dual-core Xtensa LX7, AI acceleration instructions, more GPIOs, USB OTG, and BLE 5.0 capabilities. Compare with S2 and original.
  • 254
    ESP32-C3 Architecture (RISC-V Based) Learn about the ESP32-C3, Espressif’s first RISC-V based SoC. Understand its single-core architecture, WiFi 4, BLE 5.0, and focus on cost-effectiveness.
  • 255
    ESP32-C6 Architecture and Features Explore the ESP32-C6 architecture: RISC-V core, WiFi 6 support, BLE 5.0, and integrated 802.15.4 radio for Thread and Zigbee connectivity.
  • 256
    ESP32-H2 Architecture and Features Discover the ESP32-H2, focusing on 802.15.4 (Thread/Zigbee) and BLE 5 connectivity. Understand its RISC-V core and target IoT applications.
  • 257
    Choosing the Right ESP32 Variant A guide to selecting the most suitable ESP32 variant (Original, S2, S3, C3, C6, H2) based on project requirements like connectivity, power, cost, and performance.
  • 258
    Porting Code Between ESP32 Variants Learn strategies and best practices for porting existing ESP-IDF code between different ESP32 variants, considering architectural and peripheral differences.
  • 259
    USB Interface on ESP32-S2/S3 Utilize the native USB On-The-Go (OTG) peripheral available on ESP32-S2 and ESP32-S3 for implementing various USB device classes or host functions.
  • 260
    USB CDC Implementation on ESP32-S2/3 Implement the USB Communications Device Class (CDC) on ESP32-S2/S3, allowing the ESP32 to appear as a virtual serial port over USB to a host computer.
  • 261
    USB MSC (Mass Storage) Implementation Configure the ESP32-S2/S3 as a USB Mass Storage Class (MSC) device, allowing it to appear as a USB flash drive to a host computer for file access.
  • 262
    USB HID (Human Interface) Implementation Implement USB Human Interface Device (HID) class on ESP32-S2/S3 to emulate keyboards, mice, or other HID devices over a wired USB connection.
  • 263
    ESP32-S3 Neural Network Acceleration Explore the AI/NN acceleration instructions available on the ESP32-S3’s Xtensa LX7 cores for optimizing machine learning inference tasks at the edge.
  • 264
    Thread Protocol on ESP32-H2 Implement the Thread networking protocol using the ESP32-H2’s integrated 802.15.4 radio. Build secure, low-power, IPv6-based mesh networks.
  • 265
    Bluetooth 5.0 Features on Newer Variants Leverage enhanced Bluetooth 5.0 features available on newer ESP32 variants (S3, C3, C6, H2), such as extended advertising, higher data rates, and LE Audio potential.
  • 266
    Zigbee Implementation on ESP32-H2 Utilize the ESP32-H2’s 802.15.4 radio to implement Zigbee connectivity. Create or join Zigbee networks for home automation and other IoT applications.
  • 267
    Matter Protocol Implementation Explore implementing the Matter (formerly CHIP) smart home standard on capable ESP32 variants (like C6, H2) using Thread, WiFi, and BLE.
  • 268
    Ultra-Wideband (UWB) Support Discuss potential future ESP32 variants or companion chips supporting Ultra-Wideband (UWB) technology for precise location and ranging applications.
  • 269
    Low-Power Features Comparison Specific low-power capabilities and deep sleep current consumption across different ESP32 variants to choose the best fit for battery-powered devices.
  • 270
    Secure Element Usage on ESP32-H2 Explore the potential integration and usage of a Secure Element with the ESP32-H2 for enhanced hardware-based security and key management.
  • 271
    Optimizing for Cost vs Performance Analyze the cost-performance trade-offs between different ESP32 variants. Select the most economical option that still meets project performance needs.
  • 272
    Hardware Design Differences Between Variants Key hardware design differences (pinouts, power requirements, antenna considerations) when working with various ESP32 modules and SoCs.
  • 273
    Variant-Specific Peripherals Identify peripherals unique to specific ESP32 variants, such as USB OTG (S2/S3), AI accelerators (S3), or the 802.15.4 radio (C6/H2).
  • 274
    Variant-Specific Limitations Understand the limitations or missing features of certain ESP32 variants compared to others (e.g., single core, lack of Ethernet, specific radio support).
  • 275
    Cross-Variant Compatibility Strategies Learn software design strategies and use of ESP-IDF abstractions to maximize code compatibility across different ESP32 target variants.

Volume 12: Advanced Development and Deployment

Transform your prototype into a production-ready product. This volume covers the complete development lifecycle, from writing optimized code and setting up CI/CD pipelines to crucial production skills like firmware provisioning, secure OTA updates, and fleet management.
25 chapters Chapters 276-300
  • 276
    Performing Unit Tests on ESP32 Learn how to write and execute unit tests for your ESP32 code using the Unity framework integrated into ESP-IDF, ensuring code quality and reliability.
  • 277
    Continuous Integration for ESP32 Projects Set up Continuous Integration (CI) pipelines (e.g., using GitHub Actions, GitLab CI) for ESP32 projects to automate building, testing, and analysis.
  • 278
    Static Code Analysis Tools Utilize static code analysis tools (like Cppcheck, Clang-Tidy) with ESP32 projects to automatically detect potential bugs, style issues, and vulnerabilities.
  • 279
    Runtime Performance Analysis Analyze the runtime performance of your ESP32 applications using tools like GDB, tracing, and ESP-IDF’s profiling features to identify bottlenecks.
  • 280
    Memory Leak Detection and Prevention Learn techniques and use ESP-IDF tools to detect, diagnose, and prevent memory leaks in ESP32 applications, especially when using dynamic allocation.
  • 281
    Writing Optimized ESP32 Code Explore best practices for writing C/C++ code optimized for ESP32’s architecture, focusing on performance, memory usage, and compiler flags.
  • 282
    Profiling and Benchmarking ESP32 Applications Implement profiling and benchmarking strategies for ESP32 applications to measure execution time, resource usage, and compare different implementations.
  • 283
    Code Size Optimization Techniques Learn techniques to reduce the final firmware binary size for ESP32 applications, crucial for OTA updates and devices with limited flash space.
  • 284
    Power Consumption Optimization Techniques Apply advanced techniques beyond basic sleep modes to minimize ESP32 power consumption, including peripheral management and code optimization.
  • 285
    Implementing Custom Components Learn how to structure your ESP32 code into reusable custom components within the ESP-IDF build system for better modularity and organization.
  • 286
    Creating Reusable Libraries Develop reusable C/C++ libraries for ESP32, independent of the component system, suitable for sharing across different projects or platforms.
  • 287
    Production Firmware Preparation Prepare your ESP32 application firmware for production deployment, including disabling debug features, enabling security settings, and versioning.
  • 288
    Device Provisioning Methods Explore various methods for provisioning unique credentials, configuration, and identity onto ESP32 devices during manufacturing or initial setup.
  • 289
    Manufacturing Test Procedures Design and implement manufacturing test procedures for ESP32-based products to verify hardware functionality and flash production firmware efficiently.
  • 290
    OTA Update Security for ESP32 Secure the Over-the-Air (OTA) update process for ESP32 devices using signed firmware images and secure communication channels (HTTPS, MQTTS).
  • 291
    OTA Failure Recovery Strategies Implement robust Over-the-Air (OTA) update mechanisms on ESP32 with rollback capabilities and recovery strategies to handle update failures gracefully.
  • 292
    Device Lifecycle Management Understand the concepts of IoT device lifecycle management for ESP32 deployments, including provisioning, monitoring, updating, and decommissioning.
  • 293
    Remote Device Monitoring Implement systems for remotely monitoring the health, status, and performance of deployed ESP32 devices using telemetry data and cloud platforms.
  • 294
    Device Telemetry Systems Design and implement efficient telemetry systems for ESP32 devices to collect and transmit sensor data and operational metrics to backend systems.
  • 295
    Fleet Management for ESP32 Devices Explore strategies and platforms for managing large fleets of deployed ESP32 devices, including group updates, configuration management, and monitoring.
  • 296
    Secure Data Collection Architectures Design secure architectures for collecting sensitive data from ESP32 devices, ensuring end-to-end encryption and secure storage in the cloud or backend.
  • 297
    Certificate Management for IoT Understand best practices for managing X.509 certificates (provisioning, renewal, revocation) for large-scale ESP32 IoT deployments.
  • 298
    Regulatory Compliance Considerations Discuss common regulatory compliance requirements (e.g., FCC, CE for radio; GDPR for data) relevant to commercial ESP32-based products.
  • 299
    Hardware Certification Processes Overview of the hardware certification processes (like FCC, CE, IC) required to legally sell ESP32-based products in different regions.
  • 300
    Enterprise Scale IoT Solutions with ESP32 Discuss architectural considerations, challenges, and best practices for building and deploying enterprise-scale IoT solutions using ESP32 devices.