Set up Arduino for ESP32

Before you begin

Have your ESP32 board, a USB data cable and a computer ready. Identify the chip family and hardware revision printed on your board.

Install the board package

1. Install Arduino IDE.
2. Open Preferences and add the stable Espressif package URL below to Additional Boards Manager URLs.
3. Open Boards Manager and install the esp32 package by Espressif Systems.
4. Select the board definition matching your hardware and choose its serial port.

https://espressif.github.io/arduino-esp32/package_esp32_index.json

Run a serial example

Compile and upload this example. Open Serial Monitor at 115200 baud. It requires no external wiring.

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("Hello from ESP32S!");
}

void loop() {
  delay(1000);
  Serial.println("Board is running.");
}

Upload troubleshooting

Try another data cable, check the serial port and close applications using it. Follow your board instructions if manual download mode is required.

Official resources

Espressif Arduino installation guide · Arduino-ESP32 examples