RPI 3 Android TIVE ⇐ JAVA

[Anonymous]

Я общаюсь через uart между rpi 3 запуска Android Things и arduino .

при нажатии кнопки rpi . Там нет проблем. Каждые 2 секунды arduino отправляет пакет информации. < /p>

Это работает отлично, пока я не нажимаю кнопку, которая отправляет данные в arduino < /em>. arduino получает команду кнопки, но приложение Android

E/AndroidRuntime: FATAL EXCEPTION: main
Process: za.co.leafbox.boxcontrol, PID: 8817
java.lang.NumberFormatException: For input string: "pump"
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
at sun.misc.FloatingDecimal.parseFloat(FloatingDecimal.java:122)
at java.lang.Float.parseFloat(Float.java:452)
at za.co.leafbox.boxcontrol.MainActivity$2.readUartBuffer(MainActivity.java:284)
at za.co.leafbox.boxcontrol.MainActivity$2.onUartDeviceDataAvailable(MainActivity.java:234)
at com.google.android.things.pio.UartDeviceImpl$UartDeviceCallbackDispatch.dispatchInterruptEvent(UartDeviceImpl.java:250)
at com.google.android.things.pio.CallbackDispatch.onFileDescriptorEvents(CallbackDispatch.java:149)
at android.os.MessageQueue.dispatchEvents(MessageQueue.java:284)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:325)
at android.os.Looper.loop(Looper.java:142)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
< /code>

Пример полученных данных: < /p>

I/MainActivity: [45, 49, 46, 48, 48, 32, 49, 56, 46, 53, 48, 32, 54, 53, 46, 49, 48, 32, 45, 48, 46, 48, 56, 32, 48, 46, 48, 48, 32, 49, 54, 46, 51, 49, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
< /code>

OnClick< /code> функция: < /p>

public void pumpToggle(View view){
try{
if (((ToggleButton) view).isChecked()) {
byte[] buffer = {'g', 'g', '\n'};
writeUartData(aNano, buffer);
}
else{
byte[] buffer = {'g', 's', '\n'};
writeUartData(aNano, buffer);
}

} catch (IOException e) {
Log.e(TAG, "Data not Sent", e);
}
}
< /code>

UART callback:

private UartDeviceCallback mUartCallback = new UartDeviceCallback() {
@Override
public boolean onUartDeviceDataAvailable(UartDevice uart) {
// Read available data from the UART device
Log.i(TAG, "onUartDeviceDataAvailable");
try {
readUartBuffer(uart);
} catch (IOException e) {
Log.w(TAG, "Unable to access UART device", e);
}
// Continue listening for more interrupts
return true;
}

private void readUartBuffer(UartDevice uart) throws IOException {

// Maximum amount of data to read at one time
Log.i(TAG, "readUartBuffer");
final int maxCount = 64;
byte[] buffer = new byte[maxCount];
byte[] convertBuf = new byte[20];
boolean dataCompleteFlag = false;

uart.read(buffer, maxCount);

if (!dataCompleteFlag) {
for (int i = 0; i < maxCount; i++) {
if (buffer == 36) {
dataCompleteFlag = true;
measureCount++;
dataCount = 0;
}
else if(dataCount > maxCount) {
dataCount = 0;
}
else if(buffer != 0) {
finalDataBuffer[dataCount] = buffer;
dataCount++;
}
}
}

if (dataCompleteFlag) {
Log.i(TAG, Arrays.toString(finalDataBuffer));
int index = 0;
int offSet;

while (index < maxCount && finalDataBuffer[index] != 32) {
convertBuf[index] = finalDataBuffer[index];
index++;
}
index++;
offSet = index;

tankLevelString = new String(convertBuf);
Float tankFloat = parseFloat(tankLevelString);
tankLevelString += "cm";

while (index < maxCount && finalDataBuffer[index] != 32) {
convertBuf[index - offSet] = finalDataBuffer[index];
index++;
}
index++;
offSet = index;

airTempString = new String(convertBuf);
airTempString += "\u00b0C";

while (index < maxCount && finalDataBuffer[index] != 32) {
convertBuf[index - offSet] = finalDataBuffer[index];
index++;
}
index++;
offSet = index;

humidityString = new String(convertBuf);
humidityString += "%";

while (index < maxCount && finalDataBuffer[index] != 32) {
convertBuf[index - offSet] = finalDataBuffer[index];
index++;
}
index++;
offSet = index;

ecString = new String(convertBuf);

while (index < maxCount && finalDataBuffer[index] != 32) {
convertBuf[index - offSet] = finalDataBuffer[index];
index++;
}
index++;
offSet = index;

phString = new String(convertBuf);

while (index < maxCount && finalDataBuffer[index] != 0) {
convertBuf[index - offSet] = finalDataBuffer[index];
index++;
}

waterTempString = new String(convertBuf);

TextView airTemp = findViewById(R.id.airTemp);
airTemp.setText(airTempString);

TextView humidity = findViewById(R.id.humidity);
humidity.setText(humidityString);

TextView tankLevel1 = findViewById(R.id.tankLevel1);
tankLevel1.setText(tankLevelString);

TextView ec = findViewById(R.id.ec);
ec.setText(ecString);

TextView ph = findViewById(R.id.ph);
ph.setText(phString);

TextView wt = findViewById(R.id.waterTemp);
wt.setText(waterTempString);

}
}
@Override
public void onUartDeviceError(UartDevice uart, int error) {
Log.w(TAG, uart + ": Error event " + error);
}
};


Подробнее здесь: https://stackoverflow.com/questions/521 ... rashes-app