| /* | |
| Time Check | |
| Gets the time from Linux via Bridge then parses out hours, | |
| minutes and seconds using a YunShield/Yún. | |
| created 27 May 2013 | |
| modified 21 June 2013 | |
| By Tom Igoe | |
| This example code is in the public domain. | |
| http://www.arduino.cc/en/Tutorial/TimeCheck | |
| */ | |
| Process date; // process used to get the date | |
| int hours, minutes, seconds; // for the results | |
| int lastSecond = -1; // need an impossible value for comparison | |
| void setup() { | |
| Bridge.begin(); // initialize Bridge | |
| SerialUSB.begin(9600); // initialize serial | |
| while (!Serial); // wait for Serial Monitor to open | |
| SerialUSB.println("Time Check"); // Title of sketch | |
| // run an initial date process. Should return: | |
| // hh:mm:ss : | |
| if (!date.running()) { | |
| date.begin("date"); | |
| date.addParameter("+%T"); | |
| date.run(); | |
| } | |
| } | |
| void loop() { | |
| if (lastSecond != seconds) { // if a second has passed | |
| // print the time: | |
| if (hours <= 9) { | |
| SerialUSB.print("0"); // adjust for 0-9 | |
| } | |
| SerialUSB.print(hours); | |
| SerialUSB.print(":"); | |
| if (minutes <= 9) { | |
| SerialUSB.print("0"); // adjust for 0-9 | |
| } | |
| SerialUSB.print(minutes); | |
| SerialUSB.print(":"); | |
| if (seconds <= 9) { | |
| SerialUSB.print("0"); // adjust for 0-9 | |
| } | |
| SerialUSB.println(seconds); | |
| // restart the date process: | |
| if (!date.running()) { | |
| date.begin("date"); | |
| date.addParameter("+%T"); | |
| date.run(); | |
| } | |
| } | |
| //if there's a result from the date process, parse it: | |
| while (date.available() > 0) { | |
| // get the result of the date process (should be hh:mm:ss): | |
| String timeString = date.readString(); | |
| // find the colons: | |
| int firstColon = timeString.indexOf(":"); | |
| int secondColon = timeString.lastIndexOf(":"); | |
| // get the substrings for hour, minute second: | |
| String hourString = timeString.substring(0, firstColon); | |
| String minString = timeString.substring(firstColon + 1, secondColon); | |
| String secString = timeString.substring(secondColon + 1); | |
| // convert to ints,saving the previous second: | |
| hours = hourString.toInt(); | |
| minutes = minString.toInt(); | |
| lastSecond = seconds; // save to do a time comparison | |
| seconds = secString.toInt(); | |
| } | |
| } | |