Working with Arduino

This chapter contains the following sections. Please read as needed:

• Arduino Getting Started
• Setting Up Development Environment

Arduino Getting Started

New to Arduino ESP32 development and looking for a quick start? We have prepared a comprehensive Getting Started Tutorial for you.

• Section 0: Getting to Know ESP32
• Section 1: Installing and Configuring Arduino IDE
• Section 2: Arduino Basics
• Section 3: Digital Output/Input
• Section 4: Analog Input
• Section 5: Pulse Width Modulation (PWM)
• Section 6: Serial Communication (UART)
• Section 7: I2C Communication
• Section 8: SPI Communication
• Section 9: Wi-Fi Basics
• Section 10: Web Server
• Section 11: Bluetooth
• Section 12: LVGL GUI Development
• Section 13: Comprehensive Project

Note: This tutorial uses the ESP32-S3-Zero as a reference example, and all hardware code is based on its pinout. Before you start, we recommend checking the pinout of your development board to ensure the pin configuration is correct.

Setting Up Development Environment

1. Installing and Configuring Arduino IDE

Please refer to the tutorial Installing and Configuring Arduino IDE to download and install the Arduino IDE and add ESP32 support.

2. Other Tips

1. Click the board and port selector on the toolbar, then select Select other board and port. In the dialog box, search for and select "ESP32S3 Dev Module", and select the port corresponding to the board.

   

2. The ESP32-S3-DEV-KIT-N8R8 has an onboard CH334 USB hub. A single Type-C connection enumerates two independent USB devices, each with its own COM port:

   	ESP32-S3 Native USB	CH343 USB-to-UART
   Connection	ESP32-S3 built-in USB controller (GPIO20 = D+, GPIO19 = D-)	CH343 converts ESP32-S3 UART0 (GPIO43 = TX, GPIO44 = RX)
   Main uses	Flashing programs and USB device functions such as USB CDC, HID, and MSC	Flashing programs and viewing Serial0 debug logs
   Name in Device Manager	Contains Espressif or USB JTAG/serial debug unit	Contains USB-Enhanced-SERIAL CH343
   Behavior after pressing RESET in the board and port selector	The port briefly disappears and then reappears	The port remains unchanged

   info

   The RESET method for distinguishing the ports applies only to the board and port selector on the Arduino IDE toolbar. Pressing RESET while viewing Device Manager refreshes the entire device list, so you cannot use it to determine which port was re-enumerated. In that case, identify the ports by the device names shown in the table above.

   To communicate over native USB, set Tools → USB CDC On Boot to Enabled in the Arduino IDE. Serial then refers to the native USB interface. Alternatively, use an HWCDC object directly.