I can connected to esp32 bluetooth and sent data from esp32 to android (serial bluetooth terminal ). But how to send data from android to esp32 connected to laptop and show the data on serial monitor

I have tried flowcode v10 free for makers, and when I tried to use the servo controller component in esp32 the results did not work properly. I have tried changing the minimum value to 400uS and maximum to 2400uS the results in the oscilloscope doubled.