Description
This ESP32 core board is a Mini development board based on the ESP-WROOM-32 module.
The board has brought out most I/O ports to pin headers of 2.54mm pitch. These provide an easy way of connecting peripherals according to your own needs.
When it comes to developing and debugging with the development board, the both side standard pin headers can make your operation more simple and handy.
The ESP-WROOM-32 module is the industry's leading integrated WiFi + Bluetooth solution with less than 10 external components.
It integrates antenna switch, RF balun, power amplifiers, low noise amplifiers, filters and power management modules.
At the same time, it also integrates with TSMC's low-power 40nm technology, so that power performance and RF performance are safe and reliable, easy to expand to a variety of applications.
Technical Details
- Microcontroller: ESP-WROOM-32 module
- USB to Serial Port Chip: CP2102-GMR
- Operating Voltage: DC 3.3V
- Operating Current: 80mA (average)
- Current Supply: 500mA (Minimum)
- Operating Temperature Range: -10℃ ~ +60℃
- WiFi mode: Station/SoftAP/SoftAP+Station/P2P
- WiFi protocol: 802.11 b/g/n（802.11n, speed up to 150 Mbps）
- WiFi frequency range: 2.4 GHz ~ 2.5 GHz
- Bluetooth protocol: conform to Bluetooth v4.2 BR/EDR and BLE standards
- Weight: 10.1g
- Dimensions: 56mm * 26mm * 16mm
Element and Interfaces
Here is an explanation of what every element and interface of the board has:
Specialized Functions of Some Pins:
PINS | EXPLANATIONS |
|---|
IO23 | VSPI MOSI/SPI MOSI |
IO22 | WireSCL |
TXD0 | IO1/Serial TX |
RXD0 | IO3/SerialRX |
IO21 | WireSDA |
IO19 | VSPI MISO/SPI MISO |
IO18 | VSPI SCK/SPI SCK |
PINS | EXPLANATIONS |
|---|
IO5 | VSPI SS/SPI SS |
IO4 | ADC10/TOUCH0 |
IO0 | ADC11/TOUCH1 |
IO2 | ADC12/TOUCH2 |
IO15 | HSPI SS/ADC13/TOUCH3/TDO |
SD1 | IO8/FLASH D1 |
SD0 | IO7/FLASH D0 |
CLK | IO6/FLASH SCK |
CMD | IO11/FLASH CMD |
SD3 | IO10/FLASH D3 |
SD2 | IO9/FLASH D2 |
IO13 | HSPI MOSI/ADC14/TOUCH4/TCK |
IO12 | HSPI MISO/ADC15/TOUCH5/TDI |
IO14 | HSPI SCK/ADC16/TOUCH6/TMS |
IO27 | ADC17/TOUCH7 |
IO26 | ADC19/DAC2 |
IO25 | ADC18/DAC1 |
IO33 | ADC5/TOUCH8 |
IO32 | ADC4/TOUCH9 |
IO35 | ADC7 |
IO34 | ADC6 |
SENSORVN | IO39/ADC3 |
SENSORVP | IO36/ADC0 |
EN | RESET |
In-Depth Use Guide
Step 1: Install the Arduino IDE
When programming the control board, first you should install the Arduino software and driver.
Next, we will demonstrate how to test the ESP32 core board through Arduino IDE 2.3.4. Click the link to download
https://www.arduino.cc/en/software
Find 2.3.4
Choose the appropriate version for download based on your configuration.
Downloaded well the arduino-2.3.4-windows-64bit.zip package to your computer, you need to create a new folder, and then unzip the package into the new folder.
Click the icon(Arduino IDE.exe) of Arduino software to open. This is your Arduino.
Step 2: Installing the Driver
The USB to serial port chip of this control board is Silabs-CP2102. So you need to install the driver for the chip. We provide driver downloads link:
CP2102-WINDOWS
Silabs provide driver downloads link:
https://www.silabs.com/developer-tools/usb-to-uart-bridge-vcp-drivers
It includes different drivers for different computer’s systems. Download and install the driver according to your computer’s system.
For example, we download the driver for Windows 10. Get the compression package of CP210x_Windows_Drivers
Then extract the compression package, you should see the application to install.
The driver software installation is very simple. Just select the driver application as you like. Click to .exe package to install the driver. Click “Next”.
Click to select “I accept this agreement” and click “Next”.
Wait for the installation complete. Finally click “Finish” to close the window.
Step 3: Building ESP32 Environment
Click on the following menu:
Add the following link to the IDE:
https://espressif.github.io/arduino-esp32/package_esp32_index.json
Add ESP32 board type:
succeed!
Step 4: Arduino IDE Toolbar and Setting
The functions of each button on the Toolbar are listed below:
| |
|---|
Verify | Check the code for errors |
| Upload the current Sketch to the Arduino |
| Create a new blank Sketch |
| Show a list of Sketches |
| Display the serial data being sent from the development board |
Attach your ESP32 core board to your computer with the USB cable.
Check that the “Board Type” and “Serial Port” are set correctly.
Click to open the “Tools”, for “Board”, scroll to select theESP32DevModule.
Select the correct board and then set the detailed information as shown below.
Pay close attention to select the proper COM port. (Arduino driver installed well, you are supposed to see the corresponding port.)
Check out the COM port in the Device Manager of your computer’s control panel.
Here we can know the COM port is COM 8. Then select the Port COM 8 in the Arduino Tools.
Step 5: Upload the Code
Create a new sketch:
Paste and copy the source code below to Arduino IDE.
/*
This sketch demonstrates how to scan WiFi networks.
TheAPIisalmostthesameaswiththeWiFiShieldlibrary,
themostobviousdifferencebeingthedifferentfileyouneedtoinclude:*/
#include"WiFi.h"
voidsetup() {
Serial.begin(115200);
// SetWiFitostationmodeanddisconnectfromanAPifitwaspreviouslyconnected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
Serial.println("Setupdone");}
voidloop() {
Serial.println("scanstart");
// WiFi.scanNetworkswillreturnthenumberofnetworksfound
intn =WiFi.scanNetworks();
Serial.println("scandone");
if(n==0)
{Serial.println("no networks found"); }
else
{
Serial.print(n);
Serial.println(" networks found");
for (int i = 0; i < n; ++i) {
// Print SSID and RSSI for each network found
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i));
Serial.print(" (");
Serial.print(WiFi.RSSI(i));
Serial.print(")");
Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*"); delay(10);
}
}
Serial.println("");
// Wait a bit before scanning again
delay(5000);
}
Click verify button to check the errors. If compiling successfully, the message "Done compiling." will appear in the status bar.
After that, click the “Upload” button to upload the code. If the upload is successful, the message "Done uploading." will appear in the status bar.
Special Note: if fail to upload, when upload the source code, hold the BOOT button on the ESP32 board until upload well the code.
Done uploading the code to your board, open the serial monitor and set the baud rate to 115200. You should be able to see the WIFI information on the pop-up window.
