B) Interfacing RGB LED with Arduino and display of all possible colours. (inputString.substring(3, 4) >= "0" & inputString.substring(3, 4) = "0" & inputString.substring(3, 4) = "0" & inputString.substring(2, 3) = "A" & inputString.substring(2, 3) = "a" & inputString.substring(2, 3) = "0" & inputString.substring(0, 1) = "A" & inputString.substring(0, 1) = "a" & inputString. A) Interfacing LED with Arduino with variable duty cycle. print the string when a newline arrives: reserve 200 bytes for the inputString: (inputString.substring(3, 4) >= "0" & inputString.substring(3, 4) = "0" & inputString.substring(3, 4) = "0" & inputString.substring(2, 3) = "A" & inputString.substring(2, 3) = "a" & inputString.substring(2, 3) = "0" & inputString.substring(0, 1) = "A" & inputString.substring(0, 1) = "a" & inputString.substring(0, 1) <= "f" )) // wait until serial connects to run sketch So it basically, sends whatever text you want with a newline. Is this sort of thing a good case for using String and converting back and forth to char arrays, or is there a forum thread or tutorial which would be good for me to visit? if (inputString.startsWith("num", 0) & The Serial.println() function is similar to the Serial.print() function with only one difference which is following the printed text with a carriage return character (ASCII 13, or ‘r’) and a newline character (ASCII 10, or ‘n’). Numbers are printed using an ASCII character for each digit. substring and startsWith and stuff like that. Prints data to the serial port as human-readable ASCII text. Here is a code snippet of the sort of thing I'm doing (successfully) so far I know how to do this sort of thing with String object, but afraid I don't know how to do it with char arrays. It will execute all operations separated with commas within. The parenthesis operator is sure a strange one. BUT this line of code is wrong: float latitude ( (),6) What you are doing is assigning the result of this operation: ( (), 6) to a float. The other part of the problem is doing stuff with the received data, such as parsing it before running it through strtol so I can use hex as my preferred default number translation but still offer decimal and binary as options, and perhaps process a couple of non-number commands. Storing the latitude in a flot should work without any problems.
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