KS5019 Keyestudio ESP32 Core Board

1.Description

This keyestudio 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.

2.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

3.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

Wire SCL

TXD0

IO1/Serial TX

RXD0

IO3/Serial RX

IO21

Wire SDA

IO19

VSPI MISO/SPI MISO

IO18

VSPI SCK/SPI SCK

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

SENSOR VN

IO39/ADC3

SENSOR VP

IO36/ADC0

EN

RESET

4.Detailed Using Method as follows

Step1 Install the Arduino IDE

When programming the control board, first you should install the Arduino software and driver.

You can download the different versions for different systems from the link below:

https://www.arduino.cc/en/Main/OldSoftwareReleases#1.5.x

This control board is compatible with the Arduino 1.8.7 or latest version.

So next we will download the Arduino 2.3.4 software to test the keyestudio ESP32 core board.
https://www.arduino.cc/en/software

In this Windows system page, there are two options. One is Windows version, the other is Windows Installer.

For Windows Installer, you can download the installation file, this way you need to install the arduino IDE.

For simple Windows version, you can download the software directly, do not need to install, just directly use the software after unzip the package.

Next, we click the Windows, pop up the interface as below.

Click JUST DOWNLOAD.

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.

Step2 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: https://fs.keyestudio.com/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.

Step3 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!

Step4 Arduino IDE Toolbar and Setting

The functions of each button on the Toolbar are listed below:

Verify

Check the code for errors

Upload

Upload the current Sketch to the Arduino

Debugging

Create a new blank Sketch

Serial Plotter

Show a list of Sketches

Serial Monitor

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 the ESP32 Dev Module.

Select well the correct board and then should 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.

Step5 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.
The API is almost the same as with the WiFi Shield library,
the most obvious difference being the different file you need to include:
*/

#include "WiFi.h"

void setup()
{
Serial.begin(115200);
// Set WiFi to station mode and disconnect from an AP if it was previously connected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
Serial.println("Setup done");
}

void loop()
{
Serial.println("scan start");
// WiFi.scanNetworks will return the number of networks found
int n = WiFi.scanNetworks();
Serial.println("scan done");

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.

End.