Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.imos.sample.pi; import java.util.Calendar; import java.util.List; import java.util.Date; import java.util.ArrayList; import java.util.GregorianCalendar; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileWriter; import java.io.InputStreamReader; import com.pi4j.io.gpio.GpioController; import com.pi4j.io.gpio.GpioPinDigitalOutput; import com.pi4j.io.gpio.GpioFactory; import com.pi4j.io.gpio.GpioPinDigitalInput; import com.pi4j.io.gpio.PinPullResistance; import com.pi4j.io.gpio.PinState; import com.pi4j.io.gpio.RaspiPin; import com.pi4j.io.gpio.event.GpioPinDigitalStateChangeEvent; import com.pi4j.io.gpio.event.GpioPinListenerDigital; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; import org.json.JSONArray; import org.json.JSONObject; /** * This example code demonstrates how to perform simple state control of a GPIO * pin on the Raspberry Pi. * * @author Robert Savage */ public class ControlGpioExample { SMTPMailSample sample = new SMTPMailSample(); int detectionCount = 0; Calendar cal = GregorianCalendar.getInstance(); boolean recording, sendMail, canSendMail; long startTime, currentTime, timeInterval, waitingForMail, mailStartTime, moduleStartTime; StringBuilder fileName = new StringBuilder(); String videoFileName; List<String> timeStampList = new ArrayList<>(); public void controlGpio() throws InterruptedException { System.out.println("<--Pi4J--> GPIO Control Example ... started."); GpioController gpio = null; GpioPinDigitalOutput led = null; try { // create gpio controller gpio = GpioFactory.getInstance(); // provision gpio pin #01 as an output pin and turn on led = gpio.provisionDigitalOutputPin(RaspiPin.GPIO_01, "MyLED", PinState.LOW); start(led, gpio); //ledBlink(led, gpio); //motionSensor(gpio, led); //temperatureSensor(led, gpio); //distanceSensor(gpio, led); pythonTemperatureSensor(); } catch (InterruptedException e) { led.low(); // 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(); throw e; } finally { led.low(); // 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(); System.out.println("done"); } //sample.connect(String.valueOf(detectionCount), fileName.toString()); } public void pythonTemperatureSensor() { try { String cmd = "sudo python /home/pi/Adafruit_Python_DHT/examples/AdafruitDHT.py 11 4"; int count = 0; JSONArray array = new JSONArray(); int dayOfMonth = 0; cal.setTime(new Date()); dayOfMonth = cal.get(Calendar.DAY_OF_MONTH); while (true) { Process p = Runtime.getRuntime().exec(cmd); p.waitFor(); StringBuilder output = new StringBuilder(); BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = ""; while ((line = reader.readLine()) != null) { output.append(line); } String result = output.toString(), tempStr; double temp, humid; if (!result.trim().isEmpty()) { tempStr = result.substring(result.indexOf("Humid")); result = result.substring(result.indexOf("=") + 1, result.indexOf("C") - 1); temp = Double.parseDouble(result); result = tempStr; result = result.substring(result.indexOf("=") + 1, result.indexOf("%")); humid = Double.parseDouble(result); JSONObject data = new JSONObject(); data.put("temp", temp); data.put("humid", humid); data.put("time", new Date().getTime()); array.put(data); } Thread.sleep(60000); count++; if (count == 60) { Logger.getLogger(PiMainFile.class.getName()).log(Level.INFO, null, ""); cal.setTime(new Date()); StringBuilder builder = new StringBuilder(); builder.append(cal.get(Calendar.DAY_OF_MONTH)); builder.append("-"); builder.append(cal.get(Calendar.MONTH)); builder.append("-"); builder.append(cal.get(Calendar.YEAR)); builder.append("-"); builder.append(cal.get(Calendar.HOUR_OF_DAY)); builder.append("_"); builder.append(cal.get(Calendar.MINUTE)); try (BufferedWriter writer = new BufferedWriter( new FileWriter(builder.toString() + "_data.json"))) { writer.append(array.toString()); } catch (IOException ex) { } System.out.println(builder.toString()); count = 0; array = new JSONArray(); if (dayOfMonth != cal.get(Calendar.DAY_OF_MONTH)) { builder = new StringBuilder(); builder.append(cal.get(Calendar.DAY_OF_MONTH)); builder.append("-"); builder.append(cal.get(Calendar.MONTH)); builder.append("-"); builder.append(cal.get(Calendar.YEAR)); String dirName = builder.toString(); File newDir = new File("src/main/resources/" + dirName); newDir.mkdir(); File files = new File("src/main/resources/"); for (File file : files.listFiles()) { if (file.getName().endsWith(".json")) { file.renameTo(new File("src/main/resources/" + dirName + file.getName())); file.delete(); } } dayOfMonth = cal.get(Calendar.DAY_OF_MONTH); } } } } catch (IOException | InterruptedException ex) { Logger.getLogger(ControlGpioExample.class.getName()).log(Level.SEVERE, null, ex); } } private void temperatureSensor(final GpioPinDigitalOutput led, final GpioController gpio) throws InterruptedException { // provision gpio pin #01 as an output pin and turn on final GpioPinDigitalInput sensor = gpio.provisionDigitalInputPin(RaspiPin.GPIO_04, "TemperatureSensor", PinPullResistance.PULL_DOWN); System.out.println("started"); System.out.println(sensor.getMode().getValue()); led.high(); sensor.addListener((GpioPinListenerDigital) (GpioPinDigitalStateChangeEvent event) -> { System.out.println(event.getState().getValue()); }); try { int count = 0; // keep program running until user aborts for (;;) { Thread.sleep(500); count++; if (count > 200) { break; } } System.out.println("completed"); } catch (final Exception e) { System.out.println(e.getMessage()); } } private void start(final GpioPinDigitalOutput led, final GpioController gpio) throws InterruptedException { } private void ledBlink(final GpioPinDigitalOutput led, final GpioController gpio) throws InterruptedException { // set shutdown state for this pin led.setShutdownOptions(true, PinState.LOW); led.high(); System.out.println("--> GPIO state should be: ON"); Thread.sleep(5000); // turn off gpio pin #01 led.low(); System.out.println("--> GPIO state should be: OFF"); Thread.sleep(5000); // toggle the current state of gpio pin #01 (should turn on) led.toggle(); System.out.println("--> GPIO state should be: ON"); Thread.sleep(20000); // toggle the current state of gpio pin #01 (should turn off) led.toggle(); System.out.println("--> GPIO state should be: OFF"); Thread.sleep(5000); // turn on gpio pin #01 for 1 second and then off System.out.println("--> GPIO state should be: ON for only 1 second"); led.pulse(1000, true); // set second argument to 'true' use a blocking call // 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(); } private void distanceSensor(final GpioController gpio, final GpioPinDigitalOutput led) { final GpioPinDigitalInput sensor = gpio.provisionDigitalInputPin(RaspiPin.GPIO_05, "DistanceSensor", PinPullResistance.PULL_DOWN); System.out.println("started"); led.high(); sensor.addListener((GpioPinListenerDigital) (GpioPinDigitalStateChangeEvent event) -> { System.out.println(event.getState().getValue()); if (event.getState().isHigh()) { } }); int counter = 0; while (true) { if (counter > 120) { break; } try { Thread.sleep(500); } catch (InterruptedException ex) { Logger.getLogger(ControlGpioExample.class.getName()).log(Level.SEVERE, null, ex); } counter++; } } private void motionSensor(final GpioController gpio, final GpioPinDigitalOutput led) throws InterruptedException { // provision gpio pin #01 as an output pin and turn on final GpioPinDigitalInput sensor = gpio.provisionDigitalInputPin(RaspiPin.GPIO_04, "MotionSensor", PinPullResistance.PULL_DOWN); System.out.println("started"); moduleStartTime = startTime = currentTime = System.nanoTime(); sensor.addListener((GpioPinListenerDigital) (GpioPinDigitalStateChangeEvent event) -> { if (event.getState().isHigh()) { led.high(); System.out.println("Motion Detected!"); if (timeInterval > 10) { recording = false; } String value = calculateTime(System.nanoTime()); timeStampList.add(value); detectionCount++; currentTime = System.nanoTime(); if (!recording) { startTime = currentTime; } if (startTime < currentTime) { timeInterval = currentTime - startTime; timeInterval = timeInterval / 1000000000; } if (!recording) { System.out.println("recording started"); recording = true; Process p; try { createFileName(); videoFileName = fileName.toString(); //p = Runtime.getRuntime().exec("raspivid -o /home/pi/NetBeansProjects/HelloRaspberryPi/dist/" + videoFileName + " -t 10000 -td 2500,5000"); //p = Runtime.getRuntime().exec("raspivid -s -o ./" + videoFileName + " -t 10000 -td 2000 3000"); //p = Runtime.getRuntime().exec("raspivid -s -o ./" + videoFileName + " -t 10000"); p = Runtime.getRuntime().exec("raspivid -s -o ./" + videoFileName); p.waitFor(); } catch (IOException | InterruptedException e) { e.printStackTrace(); } } } if (event.getState().isLow()) { canSendMail = true; waitingForMail = 0; mailStartTime = currentTime; System.out.println("All is quiet..."); recording = false; timeInterval = 0; Process p; String cmd = null; StringBuilder output = new StringBuilder(); try { cmd = "pgrep raspivid"; System.out.println(cmd); p = Runtime.getRuntime().exec(cmd); p.waitFor(); BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = ""; while ((line = reader.readLine()) != null) { output.append(line); } System.out.println("raspivid " + output.toString()); cmd = "kill " + output.toString().trim(); System.out.println(cmd); p = Runtime.getRuntime().exec(cmd); p.waitFor(); } catch (IOException | InterruptedException ex) { Logger.getLogger(ControlGpioExample.class.getName()).log(Level.SEVERE, null, ex); } led.low(); System.out.println("recording ends"); } }); try { int count = 0; // keep program running until user aborts for (;;) { Thread.sleep(500); count++; if (count > 180) { break; } currentTime = System.nanoTime(); if (startTime < currentTime) { timeInterval = currentTime - moduleStartTime; timeInterval = timeInterval / 1000000000; System.out.println(timeInterval); if (canSendMail) { waitingForMail = currentTime - mailStartTime; waitingForMail = waitingForMail / 1000000000; if (waitingForMail > 60) { recording = false; timeInterval = 0; startTime = currentTime; waitingForMail = 0; canSendMail = false; mailStartTime = 0; System.out.println("mail sent"); try (BufferedWriter writer = new BufferedWriter(new FileWriter("timeStamp.txt"))) { for (String time : timeStampList) { writer.append(time); writer.newLine(); } } String str = creatMp4File(); File files = new File("./" + str); StringBuilder builder = new StringBuilder(); builder.append(str); if (files.exists()) { new Thread(() -> { sample.connect(String.valueOf(detectionCount), builder.toString(), "timeStamp.txt"); }).start(); } else { new Thread(() -> { sample.connect(String.valueOf(detectionCount), videoFileName, "timeStamp.txt"); }).start(); } } } } } System.out.println("loop completed"); } catch (final InterruptedException | IOException e) { System.out.println(e.getMessage()); } } private String creatMp4File() throws IOException, InterruptedException { File files = new File("./"); String cmd = "MP4Box"; for (File file : files.listFiles()) { if (file.getName().endsWith("h264")) { System.out.println(file.getName()); cmd += " -cat " + file.getName(); } } String str = videoFileName; str = str.substring(0, str.lastIndexOf(".h264")); str = "new" + str + ".mp4"; cmd += " -new " + str; System.out.println(cmd); Process p; p = Runtime.getRuntime().exec(cmd); p.waitFor(); return str; } private void createFileName() { fileName = new StringBuilder(); cal = GregorianCalendar.getInstance(); cal.setTimeInMillis(System.currentTimeMillis()); fileName.append(cal.get(Calendar.HOUR_OF_DAY)); fileName.append("_"); fileName.append(cal.get(Calendar.MINUTE)); fileName.append("_"); fileName.append(cal.get(Calendar.SECOND)); fileName.append("_"); fileName.append(cal.get(Calendar.MILLISECOND)); fileName.append(".h264"); } String calculateTime(long timeInMilliSec) { StringBuilder timeStamp = new StringBuilder(); cal = GregorianCalendar.getInstance(); cal.setTimeInMillis(System.currentTimeMillis()); timeStamp.append(cal.get(Calendar.DAY_OF_MONTH)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.MONTH)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.YEAR)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.HOUR_OF_DAY)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.MINUTE)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.SECOND)); timeStamp.append("_"); timeStamp.append(cal.get(Calendar.MILLISECOND)); return timeStamp.toString(); } }