11. Networking and Communications

Group Assignment

You can find more details on our lab site: TechWorks - Networking and Communications

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UART Communication Protocol

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I2C Communication Protocol

XIAO ESP32-c3 —> XIAO RP2040

🔧 Uploading Code to XIAO ESP32-C3 Using Arduino IDE

✅ Step 1: Install ESP32 Board Support

1. Open Arduino IDE.
2. Go to File → Preferences.
3. In the “Additional Boards Manager URLs” field, add:

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

If you have other URLs there, separate them with a comma.

1. Click OK.

2. Go to Tools → Board → Boards Manager.

3. Search for esp32 and install “esp32 by Espressif Systems” (install the latest version).

✅ Step 2: Select the XIAO ESP32-C3 Board

1. Go to Tools → Board and select:

XIAO_ESP32C3

If not visible, scroll or search after installing the ESP32 core.

1. Go to Tools → Port and choose the correct COM port for the board.

✅ Step 3: Uploading Code (Tips)

• If the upload fails, double-press the RESET button on the XIAO ESP32-C3.
• The onboard LED should start pulsing — it’s now in bootloader mode.
• Then click Upload again.

Test Example

void setup() {
Serial.begin(115200);
}

void loop() {
Serial.println("Hello from XIAO ESP32-C3!");
delay(1000);
}

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