Introduction to ESP32

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Introduction to ESP32 chips/boards, Arduino IDE/Toolchains, and ESP32 projects.

Introduction to ESP32 SOCs

ESP32
a dual-core XTensa LX6 MCU, capable of running at 240 MHz with 520 KB of internal SRAM, ntegrated 2.4 GHz, 802.11 b/g/n Wi-Fi and Bluetooth 4.2 (LE) connectivity
ESP32-S3
a dual-core XTensa LX7 MCU, capable of running at 240 MHz. Apart from its 512 KB of internal SRAM, it also comes with integrated 2.4 GHz, 802.11 b/g/n Wi-Fi and Bluetooth 5 (LE) connectivity that provides long-range support.
ESP32-C3
a single-core Wi-Fi and Bluetooth 5 (LE) microcontroller SoC, based on the open-source RISC-V architecture.

ESP32 Interfaces and Peripherals

ESP32-WROOM-32

Insight Into ESP32 Features & Using It With Arduino IDE

Features:

NodeMCU-32S pinout

ESP32-WROOM-32 pinout

ESP32 CAM pinout

ESP32-CAM upload code
ESP-WHO (face detection and recognition)
ESP32-CAM video streaming face recognition
ESP32-CAM video streaming Web server
Code: ESP32-CAM Web server

EPS32 IDE / Toolchains

https://github.com/espressif/arduino-esp32/releases/

ESP32 Arduino IDE

【ESP32專欄】如何安裝及設定ESP32的開發環境

  1. Download Arduino IDE, then Install on PC
  2. Run Arduino
  3. Files>Preferences>Setting> URLs = https://github.com/espressif/arduino-esp32/releases/download/2.0.5/package_esp32_index.json
  4. Tools>Board>Board Managers>ESP32 Arduino> select NodeMCU-32S
  5. Tools>Port> select COM3 or /dev/ttyUSB0
  6. Tools>Manager Libraries…> search packages to install
  7. Sketch>Include Library>Add .ZIP Library…
  8. Download Sample Codes (click Code, then select Download ZIP)
  9. Uncompress arduino-master.zip, store samples folder to ~/Documents/Arduino/
  10. File>Examples> select 01.Basics/Blinky to Verify, then Upload
  11. Press on IO0 (BOOT) button of NodeMCU-32S to upload code
  12. Open Arduino Monitor

ESP32 Toolchains

ESP-IDF
Standard Setup of Toolchain for Windows

  1. run ESP-IDF Installer (556.65MB)
  2. run ESP-IDF Command Prompt / PowerShell
  3. run batch
    • cd C:/Users/USER/Desktop/esp-idf>
    • install.bat
    • export.bat
  4. run menuconfig
    • cd examples/get-started/hello_world
    • idf.py set-target ESP32
    • idf.py menuconfig
  5. build sample code (hello_world)
    • cd examples/get-started/hello_world
    • idf.py build
    • idf.py –p COM3 flash
    • idf.py –p COM3 monitor

ESP-IDF using Visual Studio Code

Standard Toolchain Setup for Linux and macOS

  1. Install Prerequisites
    Ubuntu & Debian:
    sudo apt-get install git wget flex bison gperf python3 python3-pip python3-setuptools cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0
  2. Get ESP-IDF
    mkdir -p ~/esp
    cd ~/esp
    git clone --recursive https://github.com/espressif/esp-idf.git
  3. Set up the tools
    cd ~/esp/esp-idf
    ./install.sh esp32
    For more chips targets:
    cd ~/esp/esp-idf
    ./install.sh esp32,esp32s2
    cd ~/esp/esp-idf
    ./install.sh all
  4. Set up the environment variables
    . $HOME/esp/esp-idf/export.sh

  • Connect Your Device
    Serial ports have the following patterns in their names:
    Windows: names like COM1
    Linux: starting with /dev/ttyUSB0
    macOS: starting with /dev/cu

  • Configure Your Project
    For Windows:
    cd %userprofile%\esp\hello_world
    idf.py set-target esp32
    idf.py menuconfig

Linux/macOS:
cd ~/esp/esp-idf/examples/get-started/hello_world
idf.py set-target esp32
idf.py menuconfig

  • Build the Project
    idf.py build
  • Flash onto the Device
    idf.py -p PORT [-b BAUD] flash
  • Monitor the Output
    idf.py -p <PORT> monitor
    idf.py -p /dev/ttyUSB0 flash monitor
  • Erase Flash
    idf.py -p /dev/ttyUSB0 erase_flash (need to press IO0 button)

ESP32 Github

ESP-ADF

ESP-VA-SDK

ESP-SkaiNet

ESP-SR

Programming ESP32-S

  • Connect ESP32-S to FT232R, FT232R connected to PC
    sudo chmod 777 /dev/ttyUSB0

  • Setup ESP-IDF
    cd ~/esp/esp-idf
    . ./export.sh

  • A2DP-Sink example code（藍牙音箱）
    cd examples/bluetooth/bluedroid/classic_bt/a2dp_sink

  • menu-configure I2S pins
    idf.py menuconfig

    A2DP Example Configuration --->press Enter
    A2DP Sink Output (External I2S Codec) --->
(22) I2S LRCK (WS) GPIO
(26) I2S BCK GPIO
(25) I2S DATA GPIO

    press S to Save
    press Q to Quit

  • Build code
    idf.py build

  • Upload code to ESP32-S
    press & hold IO0 button, then press & hold RESET button
    idf.py -p /dev/ttyUSB0 flash
    release RESET button, then release IO0 button

ESP32 Projects

160+ ESP32 Projects, Tutorials and Guides with Arduino IDE

小狐狸事務所 - 兩個ESP32 飛控板專案

BLE Haptic Dual Joystick Controller

ESP32-BLE-Gamepad
Sample Code: ESP32_Gamepad_Test
Android App: GamePad Tester Lite



This site was last updated October 30, 2023.