BLE only getting Battery Level characteristic Value IOS - ios

Question

I am trying to read all the services available and their characteristics value using CoreBluetooth framework from a device.
- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral
advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI {
NSLog(#"Received peripheral : \n%#", peripheral);
NSLog(#"Adv data : %#", advertisementData);
self.activeperipheral=peripheral;
[self.myCentralManager connectPeripheral:peripheral options:nil];
if(peripheral.state==CBPeripheralStateConnected){
peripheral.delegate=self;
NSLog(#"Connected");
}
else
NSLog(#"Not Connected");
NSArray *serviceUUIDs=[advertisementData objectForKey:CBAdvertisementDataServiceUUIDsKey];
for(CBUUID *foundserviceUUIDs in serviceUUIDs){
if([serviceUUIDs containsObject:foundserviceUUIDs]){
NSLog(#"%#",serviceUUIDs);
}
}
}
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError *)error{
for(CBService *service in peripheral.services){
[peripheral discoverCharacteristics:nil forService:service];
NSLog(#"Discover Service:%#",service);
}
}
-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error{
for(CBCharacteristic *characteristic in service.characteristics){
[peripheral setNotifyValue:YES forCharacteristic:characteristic];
self.myCharacteristic=characteristic;
NSLog(#"NotifyValue set on %#",characteristic);
//[peripheral readValueForCharacteristic:myCharacteristic];
}
}
-(void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error{
if(characteristic.isNotifying)
NSLog(#"Notification began on %#",characteristic);
}
-(void)peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error {
NSLog(#"%#",characteristic);
// NSLog(#"Characteristic Value Updated");
}
- (int)scanForPeripherals {
NSLog(#"Scanning");
if(self.myCentralManager.state!=CBCentralManagerStatePoweredOn)
NSLog(#"Turn on Bluetooth");
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:NO], CBCentralManagerScanOptionAllowDuplicatesKey,
nil];
NSLog(#"Scanning");
[myCentralManager scanForPeripheralsWithServices:nil options:options];
return 0;
}
- (void)centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)peripheral {
NSLog(#"Peripheral Connected");
peripheral.delegate=self;
//CBUUID *serviceUUID=[CBUUID UUIDWithString:#"1804"];
[peripheral discoverServices:nil];
//[myCentralManager stopScan];
}
- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
NSLog(#"didDisconnectPeripheral");
}
- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)peripheral error:(NSError *)error {
NSLog(#"failed to connect");
}
- (void)peripheral:(CBPeripheral *)peripheral didReadRSSI:(NSNumber *)RSSI error:(NSError *)error {
NSLog(#"didReadRSSI");
}
#end
The problem is I cannot setNotifyValue : Yes for other characteristics except the BatteryLevel characteristic and I am also getting the notification for the same only.
Here is my output.
Any idea what am I doing wrong here?
Thanks

Answer 1

That because your characteristic settings in gatt file (your bluetooth project) is not properly setup. See for example another characteristic settings and update your gatt file.
Another way to get characteristic value use a timer in which read your charackteristic:
-(void)TimerFunction
{
[talking_peripher readValueForCharacteristic:_talk_charack];
NSlog("VALUE: %#" _talk_charack);
}
And that is all. But actually best to do - modify your characteristic settings in gatt file (bluetooth project).