Firstly, we have the command 'Serial.begin(9600)'. This starts serial communication, so that the Arduino can send out commands through the USB connection. The value 9600 is called the 'baud rate' of the connection. This is how fast the data is to be sent.

The fastest and preferred way to do string concatenation under Arduino is, Use the String class. If you really need the speed and/or simply want to avoid creating new in-memory strings with every concatenation operation, reserve the needed memory ahead of time with reserve().

You can change this to a higher value, but you will also have to change the Arduio Serial monitor to the same value. We will discuss this later, but for now leave it at 9600. The line beginning with 'while' ensures that there is something at the other end of the USB connection for the Arduino to talk to before it starts sending messages.

Otherwise, the message might be sent, but not displayed. This line is actually only necessary if you are using an Arduino Leonardo, because the Arduino Uno automatically resets the Arduino board when you open the Serial Monitor, whereas this does not happen with the Leonardo. The last of the new lines in 'setup' sends out the message that we see at the top of the serial monitor. The 'loop' function is where all the action happens.

This reads the next character from the buffer, and removes it from the buffer. It also assigns it to the variable 'ch'. The variable 'ch' is of type 'char' which stands for 'character' and as the name suggests, holds a single character. If you have followed the instructions in the prompt at the top of the Serial Monitor, then this character will either be a single digit number between 0 and 7 or the letter 'x'. The 'if' statement on the next line checks to see if it is a single digit by seeing if 'ch' is greater than or equal to the character '0' and less than or equal to the character '7'. It looks a little strange comparing characters in this way, but is perfectly acceptable. Each character is represented by a unique number, called its ASCII value.

This means that when we compare characters using = it is actually the ASCII values that were being compared. If the test passes, then we come to the next line. The first line uses Serial.print rather than Serial.println. The different between the two is that Serial.print does not start a new line after printing whatever is in its parameter. We use this in the first line, because we are printing the message in two parts. Firstly the general bit: 'Turned on LED ' and then the number of the LED.

The number of the LED is held in an 'int' variable rather than being a text string. Serial.print can take either a text string enclosed in double-quotes, or an 'int' or for that matter pretty much any type of variable.

After the 'if' statement that handles the case, when a single digit has been handled, there is a second 'if' statement that checks to see if 'ch' is the letter 'x'. You have been successfully subscribed to the Notification List for this product and will therefore receive an e-mail from us when it is back in stock! For security reasons, an e-mail has been sent to you acknowledging your subscription. Please remember that this subscription will not result in you receiving any e-mail from us about anything other than the restocking of this item. If, for any reason, you would like to unsubscribe from the Notification List for this product you will find details of how to do so in the e-mail that has just been sent to you! Roblox redeem card. Deool band marathi movie download free.