CODEWITHSUNDEEP
iosiphonecore-bluetoothcbcentralmanagercbperipheralmanager
Vineesh TP
Vineesh TP

Reputation: 7963

didWriteValueForCharacteristic getting null in Characteristic value

 I am sending the date from to the peripheral by using the below code.

NSString* alternative = [NSString stringWithFormat:@"hello"];
NSData *dataToSend = [alternative dataUsingEncoding:NSUTF8StringEncoding];
[self.discoveredPeripheral writeValue:dataToSend forCharacteristic:self.discoveredCharacteristics type:CBCharacteristicWriteWithResponse];

While sending called the delegate method.

- (void)peripheral:(CBPeripheral *)iPeripheral didWriteValueForCharacteristic:(CBCharacteristic *)iCharacteristic error:(NSError *)iError {

    NSLog(@"didWriteValue characteristic.value: %@ ", iCharacteristic.value);

    NSLog(@"Error = %@", iError);

}

But, here I am getting null value.

I can receive in peripheral app also in,

- (void)peripheralManager:(CBPeripheralManager *)iPeripheral didReceiveWriteRequests:(NSArray *)iRequests {


    [iPeripheral respondToRequest:[iRequests objectAtIndex:0] withResult:CBATTErrorSuccess];
    CBATTRequest *aRequest = iRequests[0];
    NSData *aData = aRequest.value;
    NSDictionary *aResponse = (NSDictionary *)[NSJSONSerialization JSONObjectWithData:aData options:NSJSONReadingMutableContainers error:nil];

    NSLog(@"Received Data = %@", aResponse);
}

receiving result value is same null.

- (void)peripheral:(CBPeripheral *)iPeripheral didWriteValueForCharacteristic:(CBCharacteristic *)iCharacteristic error:(NSError *)iError

The couldn't recognize the issue while sending the data to peripheral. Any answer will help me a lot

Upvotes: 0

Views: 813

Answers (0)

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