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Getting Started: ESP32

ESP32 (Type C)

This ESP-32 Development Board with 2.4 GHz ultra-low power dual-mode Wi-Fi and Bluetooth dev kit is ideal for prototyping IoT or other devices which require wireless and internet connectivity, utilizing the powerful ESP32 microcontroller.

Specifications

  • Supported interfaces: UART, SPI, SDIO, 12C, PWM, 12S, IR, ADC, DAC
  • On chip sensors: hall sensors, temperature sensors, capacitive touch sensors
  • Serial port speed: default 115200bps
  • Spectrum range: 2412 ~ 2484MHz
  • Dual-Core Processor: Dual-core 32-bit Xtensa LX6 CPU
  • High Clock Speed: Operates up to 240 MHz
  • Memory: 4 MB Flash, 520 KB SRAM
  • Wide Operating Temperature: -40°C to +85°C

Features

  • Integrated WiFi: Supports 802.11 b/g/n for wireless connectivity
  • Bluetooth Connectivity: Includes Bluetooth Classic and BLE for versatile communication
  • CP2102 USB Interface: Enables easy USB-to-Serial communication and programming

Driver Installation

The CP210x USB chip converts a USB connection into a standard serial port, enabling your computer to communicate with microcontrollers like the ESP32.
If you're using an ESP32 for the first time, you might notice that when you connect the board to your computer, its COM port does not appear. This usually indicates that the necessary drivers are not installed.

Step 1: Download the CP210x USB-to-UART Driver

  • Visit the official Silicon Labs website:
  • Go to the Silicon Labs CP210x driver download page:
    https://www.silabs.com/developer-tools/usb-to-uart-bridge-vcp-drivers?tab=downloads
  • Download the correct driver for your operating system:
  • The website offers drivers for Windows, macOS, and Linux.
  • For Linux, most distributions already include the CP210x drivers, but you can manually install them if needed.

Step 2: Install the driver

Windows

1. Once the CP210x Universal Windows Drivers have been downloaded, right-click the file and extract the installation contents.

2. Navigate to the extracted folder and double-click CP210xVCPInstaller_x64.exe to begin the installation.

3. Follow the on-screen instructions in the installation wizard, click "Next", and accept the terms of use to finalize the installation.

MacOS

1. Once the Mac OSX VCP Driver has been downloaded, extract the installation files.
2. Go to the extracted folder and double-click SiLabsUSBDriverDisk.dmg to initiate the installation.

3. Open the Install CP210x VCP Driver file.

4. Click the "Open" button.

5. Follow the on-screen instructions in the installation wizard and complete the setup process.


In certain cases, your computer may block the installation.

Press "OK" and proceed to System Preferences.
Open System Preferences, select Security & Privacy, then click 'Click the lock to make changes' and enter your credentials.

Then click the "Allow" button to allow the CP210x drivers to install.

Step 3: Verify Driver Installation

Windows

1. Press Windows + X and select Device Manager
2. With your ESP32 board connected to your Windows PC via a USB cable, check the "Ports" section. You should see "Silicon Labs CP210x USB to UART Bridge (COM1)" or a similar entry with a different COM port number.

3. In Arduino IDE, choose the corresponding COMX port for your ESP32 board, as previously shown in the Device Manager.

MacOS

1. In Arduino IDE, select the USB port for your ESP32 board. In our case, it appears as /dev/cu.SLAB_USBtoUART Serial Port (USB).


Test ESP32 in Arduino IDE (Blink LED)

We'll be conducting the test on Windows. To verify that your ESP32 Development Board is set up correctly, we will upload a simple Blink LED program using Arduino IDE. This will toggle the built-in LED on and off at regular intervals.

Step 1: Open Arduino IDE

1. Launch Arduino IDE.
2. Click the Board Manager that is found in the left side panel and search esp32 by Espressif Systems then install.

3. Go to Tools → Board → esp32 → ESP32 Dev Module.


4. Navigate to Tools → Port and choose the correct COM port.


Step 2: Open a Blank Sketch

1. Click File → Examples → Basics → BareMinimum
2. Alternatively, create a new sketch and paste the following code:

#define LED_BUILTIN 2 // Built-in LED on ESP32

void setup() {
pinMode(LED_BUILTIN, OUTPUT); // Set LED pin as output
}

void loop() {
digitalWrite(LED_BUILTIN, HIGH); // Turn LED ON
delay(1000); // Wait 1 second
digitalWrite(LED_BUILTIN, LOW); // Turn LED OFF
delay(1000); // Wait 1 second
}

Step 3: Upload the Code

1. Click the Upload button (→) in Arduino IDE.
2. As soon as text appears in the Output panel, quickly press the IO0/BOOT button to enter bootloader mode.
3. Wait for the "Done uploading" message in the status bar.
4. The onboard LED should be blinking.

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