/**
* [ARGUMENT/OPTION "--pin (#)" | "-p (#)" ] This example program accepts an optional argument for
* specifying the GPIO pin (by number) to use with this GPIO listener example. If no argument is
* provided, then GPIO #1 will be used. -- EXAMPLE: "--pin 4" or "-p 0".
*
* <p>[ARGUMENT/OPTION "--pull (up|down|off)" | "-l (up|down|off)" | "--up" | "--down" ] This
* example program accepts an optional argument for specifying pin pull resistance. Supported
* values: "up|down" (or simply "1|0"). If no value is specified in the command argument, then the
* pin pull resistance will be set to PULL_UP by default. -- EXAMPLES: "--pull up", "-pull down",
* "--pull off", "--up", "--down", "-pull 0", "--pull 1", "-l up", "-l down".
*
* @param args
* @throws InterruptedException
* @throws PlatformAlreadyAssignedException
*/
public static void main(String[] args)
throws InterruptedException, PlatformAlreadyAssignedException {
// ####################################################################
//
// since we are not using the default Raspberry Pi platform, we should
// explicitly assign the platform as the BananaPro platform.
//
// ####################################################################
PlatformManager.setPlatform(Platform.BANANAPRO);
// create Pi4J console wrapper/helper
// (This is a utility class to abstract some of the boilerplate code)
final Console console = new Console();
// print program title/header
console.title("<-- The Pi4J Project -->", "GPIO Input Example");
// allow for user to exit program using CTRL-C
console.promptForExit();
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// ####################################################################
//
// When provisioning a pin, use the BananaProPin class.
//
// ####################################################################
// by default we will use gpio pin #01; however, if an argument
// has been provided, then lookup the pin by address
Pin pin =
CommandArgumentParser.getPin(
BananaProPin.class, // pin provider class to obtain pin instance from
BananaProPin.GPIO_01, // default pin if no pin argument found
args); // argument array to search in
// by default we will use gpio pin PULL-UP; however, if an argument
// has been provided, then use the specified pull resistance
PinPullResistance pull =
CommandArgumentParser.getPinPullResistance(
PinPullResistance.PULL_UP, // default pin pull resistance if no pull argument found
args); // argument array to search in
// provision gpio pin as an input pin
final GpioPinDigitalInput input = gpio.provisionDigitalInputPin(pin, "MyInput", pull);
// set shutdown state for this pin: unexport the pin
input.setShutdownOptions(true);
// prompt user that we are ready
console.println("Successfully provisioned [" + pin + "] with PULL resistance = [" + pull + "]");
console.emptyLine();
console.box("The GPIO input pin states will be displayed below.");
console.emptyLine();
// display pin state
console.emptyLine();
console.println(
" ["
+ input.toString()
+ "] digital state is: "
+ ConsoleColor.conditional(
input.getState().isHigh(), // conditional expression
ConsoleColor.GREEN, // positive conditional color
ConsoleColor.RED, // negative conditional color
input.getState()));
console.emptyLine();
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
}
/**
* @param args --none-
* @throws InterruptedException
*/
public static void main(String[] args) throws InterruptedException {
// create Pi4J console wrapper/helper
// (This is a utility class to abstract some of the boilerplate code)
final Console console = new Console();
// print program title/header
console.title("<-- The Pi4J Project -->", "IFTTT Maker Channel Trigger Example");
// allow for user to exit program using CTRL-C
console.promptForExit();
// create gpio controller
final GpioController gpio = GpioFactory.getInstance();
// provision gpio pin as an input pin
final GpioPinDigitalInput input =
gpio.provisionDigitalInputPin(RaspiPin.GPIO_00, "MyInputPin", PinPullResistance.PULL_DOWN);
// provide 500ms of pin debounce protection
input.setDebounce(500);
;
// -----------------------------------------
// Add the IFTTT Maker Channel Trigger
// (This is where the magic happens)
// -----------------------------------------
input.addTrigger(
new IFTTTMakerChannelTrigger(
IFTTT_MAKER_CHANNEL_API_KEY, // <<-- PROVIDE YOUR ACCOUNT SPECIFIC IFTTT MAKER CHANNEL
// API KEY
IFTTT_MAKER_CHANNEL_EVENT_NAME, // <<-- PROVIDE THE IFTTT MAKER CHANNEL EVENT NAME
// (defined in your IFTTTT recipe)
PinState.HIGH, // <<-- OPTIONALLY DEFINE A SPECIFIC STATE TO TRIGGER ON
// OPTIONALLY REGISTER A TRIGGER CALLBACK LISTENER
// (Note: this callback parameter is not required for basic functionality)
new IFTTTMakerChannelTriggerListener() {
@Override
public boolean onTriggered(IFTTTMakerChannelTriggerEvent event) {
// The IFTTT Maker Channel API accepts three value parameters (value1, value2, and
// value3)
// By default, Pi4J applies the following values to each:
//
// "value1" = {pin-name}
// "value2" = {pin-state-value} (as an Integer; 0==LOW, 1==HIGH)
// "value3" = {json-payload} Example:
// {
// "pin": {
// "name": "MyInputPin",
// "address": "0",
// "provider": "RaspberryPi GPIO Provider",
// "mode": "input",
// "direction": "IN",
// "pull": "down"
// },
// "state": {
// "name": "HIGH",
// "value": "1",
// "is-high": "true",
// "is-low": "false"
// },
// "timestamp": "2016-04-15T17:32:49.666-0400"
// }
//
// However, you can override any of these defaults in your callback listener by
// applying new string values via the 'setValueX()' methods on the event object.
//
// Example:
if (event.getValue2().equals("1")) {
event.setValue2("ON");
} else {
event.setValue2("OFF");
}
// display event trigger details on screen
console.println(" --> IFTTT MAKER CHANNEL EVENT TRIGGER");
console.println(" - GPIO PIN : " + event.getPin());
console.println(" - PIN STATE : " + event.getState());
console.println(" - IFTTT EVENT NAME : " + event.getEventName());
console.println(" - IFTTT EVENT VALUE 1 : " + event.getValue1());
console.println(" - IFTTT EVENT VALUE 2 : " + event.getValue2());
console.println(" - IFTTT EVENT VALUE 3 : " + event.getValue3());
console.emptyLine();
// MAKE SURE TO RETURN 'true' TO CONTINUE WITH THE IFTTT MAKER CHANNEL API CALL
// (you can optionally return 'false' if you want to abort the IFTTT API call)
return true;
}
}));
// set shutdown state for this pin: unexport the pin
input.setShutdownOptions(true);
// prompt user that we are ready
console.println(
"Successfully provisioned ["
+ input
+ "] with PULL resistance = ["
+ input.getPullResistance()
+ "]");
console.emptyLine();
// wait for user to exit by pressing CTRL-C
console.waitForExit();
// stop all GPIO activity/threads by shutting down the GPIO controller
// (this method will forcefully shutdown all GPIO monitoring threads and scheduled tasks)
gpio.shutdown();
}