A robot car which can be controlled using a smartphone over Wifi.
Steps.
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Download the blynk app in your smartphone.
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Set up the blynk to ESP8266 module and place the corresponding buttons as shown in the picture provided.
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Youll recieve an authenication token in your email.
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Copy paste that authentication code as your "auth" in the code.
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Put the name of the wifi which is connected to your smartphone and also its password in the arduino code.
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Make sure you set the board as ESP8266 module in the arduino software application (should install blynk library if you haven't).
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Connect a USB cable to your NODEMCU from your laptop.
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Run the code and wait for the "ping" to appear in the serial monitor.
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Press the play button on your blynk app,it will show "online".
Now by pressing the buttons,you should be able to control your car.π€