- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello, I have a similar problem. I have a service with two characteristics ( temperature and humidity) and I created an android application to receive data from the characteristics, but I can not get one of them .
This is the characteristic that if it works (temperature):
cbtemp.setOnClickListener(new View.OnClickListener() { //CheckBox temperature
@Override
public void onClick(View view) {
boolean isChecked = ((CheckBox) view).isChecked();
if (isChecked) {
BluetoothGattService mCustomService=mBluetoothLeService.getServices();
BluetoothGattCharacteristic mCustomCharacteristic = mCustomService.getCharacteristic(UUID.fromString("00000002-0000-1000- 8000- 00805f9b34fb")); //UUID characteristic temperature
final int charaProp = mCustomCharacteristic.getProperties();
if ((charaProp | BluetoothGattCharacteristic.PROPERTY_READ) > 0) {
if (mNotifyCharacteristic != null) {
mBluetoothLeService.setCharacteristicNotification(mNotifyCharacteristic, false);
mNotifyCharacteristic = null;
}
mBluetoothLeService.readCharacteristic(mCustomCharacteristic); }
if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
mNotifyCharacteristic = mCustomCharacteristic;
mBluetoothLeService.setCharacteristicNotification(mCustomCharacteristic, true); }
}
});
where getservices() function is :
public BluetoothGattService getServices(){
return mBluetoothGatt.getService(UUID.fromString("00000001-0000-1000-8000-00805f9b34fb")); //UUID Service
}
For the characteristic humidity I do the same procedure but using the corresponding UUID (00000003-0000-1000- 8000-00805f9b34fb) but by clicking on the checkbox to activate it tells me :
java.lang.NullPointerException : Attempt to invoke virtual method ' int android.bluetooth.BluetoothGattCharacteristic.getProperties () ' on a null object reference
I'm really lost and not to do more . Thank you
Solved! Go to Solution.
- Labels:
-
BLE
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I checked this on a bluetooth dongle and I can see both the Temp and Humidity items. As I said before your program is working as far as the cypress end of it . If you are having issue with the Android program I am not going to be of help as this is a Cypress site and you need to have an Android programmer to help you.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello, I want to access humidity just as I access the temperature to send me notifications. When I access the temperature if I send data from the PSoC ( for now I send keystrokes CapSense as proof ) , but access to humidity gives me the error:
java.lang.NullPointerException : Attempt to invoke virtual method ' int android.bluetooth.BluetoothGattCharacteristic.getProperties () ' on a null object reference .
Not because I fail if I 'm doing the same in both cases . Not if the descriptor must be enabled to notify . Thank you
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I checked this on a bluetooth dongle and I can see both the Temp and Humidity items. As I said before your program is working as far as the cypress end of it . If you are having issue with the Android program I am not going to be of help as this is a Cypress site and you need to have an Android programmer to help you.