| /* | |
| Spacebrew Range | |
| Demonstrates how to create a sketch that sends and receives analog | |
| range value to and from Spacebrew. Every time the state of the | |
| potentiometer (or other analog input component) change a spacebrew | |
| message is sent. The sketch also accepts analog range messages from | |
| other Spacebrew apps. | |
| Make sure that your Yún is connected to the internet for this example | |
| to function properly. | |
| The circuit: | |
| - Potentiometer connected to Yún. Middle pin connected to analog pin A0, | |
| other pins connected to 5v and GND pins. | |
| created 2013 | |
| by Julio Terra | |
| This example code is in the public domain. | |
| More information about Spacebrew is available at: | |
| http://spacebrew.cc/ | |
| */ | |
| // create a variable of type SpacebrewYun and initialize it with the constructor | |
| SpacebrewYun sb = SpacebrewYun("spacebrewYun Range", "Range sender and receiver"); | |
| // variable that holds the last potentiometer value | |
| int last_value = 0; | |
| // create variables to manage interval between each time we send a string | |
| void setup() { | |
| // start the serial port | |
| SerialUSB.begin(57600); | |
| // for debugging, wait until a serial console is connected | |
| delay(4000); | |
| while (!SerialUSB) { | |
| ; | |
| } | |
| // start-up the bridge | |
| Bridge.begin(); | |
| // configure the spacebrew object to print status messages to serial | |
| sb.verbose(true); | |
| // configure the spacebrew publisher and subscriber | |
| sb.addPublish("physical pot", "range"); | |
| sb.addSubscribe("virtual pot", "range"); | |
| // register the string message handler method | |
| sb.onRangeMessage(handleRange); | |
| // connect to cloud spacebrew server at "sandbox.spacebrew.cc" | |
| sb.connect("sandbox.spacebrew.cc"); | |
| } | |
| void loop() { | |
| // monitor spacebrew connection for new data | |
| sb.monitor(); | |
| // connected to spacebrew then send a new value whenever the pot value changes | |
| if (sb.connected()) { | |
| int cur_value = analogRead(A0); | |
| if (last_value != cur_value) { | |
| sb.send("physical pot", cur_value); | |
| last_value = cur_value; | |
| } | |
| } | |
| } | |
| // handler method that is called whenever a new string message is received | |
| void handleRange(String route, int value) { | |
| // print the message that was received | |
| SerialUSB.print("From "); | |
| SerialUSB.print(route); | |
| SerialUSB.print(", received msg: "); | |
| SerialUSB.println(value); | |
| } | |