Trouble Shooting your Arduino

Before looking here check out the connections page and the components to better understand the various parts.

What is the problem?

There may be a problem in any of the components that your solution has, namely:

• Your PC to Arduino board connection
• The code you are running on the Arduino board
• The electronic components and their connections (NOT covered here)

Adding Serial Debug Code

The following code will show you that your code is being executed on the Arduino board.

/*    Setup  */ 
void setup() {     
        // Start recording text at the Serial Monitor
        Serial.begin(9600);
        ...
}
// the loop function runs over and over again forever
void loop() {
        // The following line will write to the Serial Monitor   
        Serial.println("Turn the light ON...");
        digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
        ...