Things you need
HC-06 or HC-05 Bluetooth module
Hello, wuss up!
Before the void setup we need to create a new Serial ports because we’re already using the 0 & 1 for programming and maybe for terminal in future
In void setup, setting the serial speed and led pin as output
In void loop , after we got the data from the user , if the data is ‘o’ led on or if its ‘f’ led off , simple