- (void) getWeightData:(CBCharacteristic *)characteristic error:(NSError *)error
{
    NSData *data = [characteristic value];
    
    if([data length] > 0)
    {
        NSString *string=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        
        if(string)
        {
            NSLog(@"string looks like this %@", string);
        } else {
            NSLog(@"I've got no string converted");
        }
    } else {
        NSLog(@"I've got no value");
    }
}