![]() When you type the letter ‘c’ for example, the number 67 will be sent to the serial port. Each character on your keyboard has an associated numerical value – called its ASCII value – which is one byte. In this case, we are using the computer keyboard to write bytes to the serial port. If bytes are available the condition of the if statement will be met because Serial.available() will return a number larger than 0. ![]() The available() function checks at the serial port to see if any bytes are available and returns the number of bytes. This condition implements a function called available() from the Serial library. the controller to get the ASCII value for the character. in this exmaple, though, you're using single quotes to tell ![]() The switch statement expects single number values for each case do something different depending on the character received. This example code is in the public domain. * 5 LEDs attached to digital pins 2 through 6 through 220-ohm resistors The characters a, b, c, d, and e, will turn on LEDs. To see this sketch in action, open the Serial monitor and send any character. Statement allows you to choose from among a set of discrete values The Arduino Code /*ĭemonstrates the use of a switch statement.
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