



IoT Tutorial #2 [ Arduino Mega Tutorials #2 ]

Output is shown using LED If Desktop keyboard key "a" / "A" is pressed -> LED ON If Desktop keyboard key "b" / "B" is pressed -> LED OFF Message displayed on Arduino Terminal on Desktop using serial communication (Tx0 and Rx0).

Baud Rate is set to 9600

Pin 13 -> LED+ (Through 1K Resistor) Gnd -> LED- Serial Communication Through USB Cable (Tx0 and Rx0)

Download link is given in the Description of the YouTube video shown below.







Program:

void setup () { // put your setup code here, to run once: Serial . begin ( 9600 ); //Tx0 and Rx0 //Set Baud Rate to 9600 for Serial Communication Tx0 and Rx0 //Serial1; //Tx1 and Rx1 //Serial2; //Tx2 and Rx2 //Serial3; //Tx3 and Rx3 pinMode ( 13 , OUTPUT ); //Set Pin 13 as Output (Connected to LED) Serial . println ( "press \" a \" to switch ON the LED" ); Serial . println ( "press \" b \" to switch OFF the LED" ); } void loop () { // put your main code here, to run repeatedly: if ( Serial . available () > 0 ) { int buffer_value = Serial . read (); if ( buffer_value == 'a' ) { digitalWrite ( 13 , HIGH ); //Turn ON LED Serial . println ( "LED ON" ); } else if ( buffer_value == 'b' ) { digitalWrite ( 13 , LOW ); //Turn OFF LED Serial . println ( "LED OFF" ); } } }



Click here to see more codes for Arduino Mega (ATMega 2560) and similar Family.





Feel free to ask doubts in the comment section. I will try my best to solve it.

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This is the simplest way to encourage me to keep doing such work.





Thanks and Regards,

-Akshay P. Daga

Here I will demonstrate the mini project, Turning ON / OFF the LED using wired Serial Communication using Arduino Mega (ATMega 2560).To Turn ON / OFF the LED using wired Serial Communication (Tx0 and Rx0).Serial communication will be done by USB cable (A to B)- Arduino Mega (ATMega 2560)- USB Cable (A to B)- 1 LED- 1k Resistor- Bread Board- Male to Male wires (minimum 2)