1. Download Arduino IDE from official website: https://downloads.arduino.cc/arduino-ide/arduino-ide_2.3.7_Windows_64bit.exe 

2. Install

3. in left palate, click BOARDS MANAGER --> type Arduino Uno ---> Install Arduino Uno R4 from Arduino.

4. In the Top Drop Down Menu, select ARDUINO UNO COM3

5. Write a simple code to blink in-built LED (pin 13) of Arduino Uno Board.

6. Code:

void setup()

{

  pinMode(13, OUTPUT);

}

void loop()

{

  digitalWrite(13, HIGH);

  delay(1000);

  digitalWrite(13, LOW);

  delay(1000);

}

7. delay(1000) means 1000ms = 1000 milli seconds = 1 second

8. pinMode(13,OUTPUT) means, 13 pin (LED inbuilt ) connected internally to LED. Pin13 acts as OUPUT.

9. digitalWrite(13,HIGH) means, pin 13 is output and is given 5V (Logic 1) ... for how much time? delay(1000) --> for 1 second

10. similarly digitalWrite(13,LOW) ---> Logic 0 ---> for 1 second

11. Above code blinks LED (On= 1 second, OFF=1 second... this repeats ...hence the name void loop()

12. Verify

13. Upload

14. Thatsall...!!!

OR

if it is indicated as CH34XX on Chip instead of CP2102, then you need CH34XX drivers... 

The CH340 (i.e., all models of CH34XX) chip is used by a number of Arduino compatible boards to provide USB connectivity

they can be downloaded from website: CH340 Drivers for Windows, Mac and Linux   

OR 

directly from this link: https://sparks.gogo.co.nz/assets/_site_/downloads/CH34x_Install_Windows_v3_4.zip 

• right click on "silabser.inf"

• install

• yes/ install

• operation completed successfully

• close

Now the CP210x task is over. Reopen the Arduino IDE and complete the process as below: 

• Now close Arduino IDE and open again....

• Select the device and port (it shows as COM3, COM4, ...)

• Run a LEDBLINK code to test the device ESP32

Dump code into a DOIT ESP32 DEVKIT V1 wirelessly, but it requires a two-step process. You cannot do it directly out of the box; you must first load a "bridge" program via USB to enable future wireless (Over-The-Air or OTA) updates. 

1. Initial Setup (Physical USB)

You must initially connect the DOIT ESP32 to your computer using a USB cable to load the initial, required firmware. 

• Action: In Arduino IDE, go to File > Examples > ArduinoOTA > BasicOTA.

• Action: Update the ssid and password in the code to match your Wi-Fi network.

• Action: Upload this sketch to the ESP32 via USB. This sketch allows the ESP32 to receive future updates over Wi-Fi. 

2. Wireless Upload (OTA)

Once the BasicOTA sketch is running, you can unplug the USB cable and power the board with a battery or USB power adapter.

• Action: In Arduino IDE, go to Tools > Port.

• Action: You should now see an option for "esp32-xxxxxx at [IP address]".

• Action: Select this network port and click the Upload button as usual. 

NOTE: 

• Mandatory OTA Code: Every new sketch you upload wirelessly must include the ArduinoOTA.handle() and necessary Wi-Fi setup code, otherwise you will lose the ability to perform further wireless updates.

• Same Network: The computer sending the code and the ESP32 must be connected to the same Wi-Fi network.

• Alternative Method (Web Updater): Instead of BasicOTA, you can use the OTAWebUpdater example, which creates a web page you can visit in a browser to upload the compiled .bin file wirelessly.