1. Connect Nodemcu via USB cable to the PC. 2.Go to Open Arduino IDE. 3.Go to File->Preferences->add Url to Additional Boards Manager URLs

   Url: http://arduino.esp8266.com/versions/2.4.1/package_esp8266com_index.json

2. Go to Tool->Board->Board Manager

3. Search Esp8266 And Install It.

4. Set Board: NodeMCU 0.9 (ESP-12 Module)

5. Set PORT Example: COM6 If port doesn't appear then install CP201x driver

   Driver link: https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers

6. Setup your database and write php code. Example: Php and sql file added.

7. Upload arduino code.

   And Check Your database.

   Happy Coding