We send the chunk data based on the MTU, we are re-sending the missed packets by saving it in the array and adding header to each packet.
While re-sending there are still some more missed packets.
Code snippet for ref:
-(void)SendingBytes{
while (self.dataToSend.length > self.sendDataIndex) {
NSInteger amountToSend = self.dataToSend.length - self.sendDataIndex;
if (amountToSend > NOTIFY_MTU) {
amountToSend = NOTIFY_MTU;
}
NSData *chunk = [NSData dataWithBytes:self.dataToSend.bytes+self.sendDataIndex length:amountToSend];
//adding to the header with chunk
NSString *strData = [NSString stringWithFormat:@"%dHello %@",CountValue,chunk];
NSData *ChunkHeaderAddded = [strData dataUsingEncoding:NSUTF8StringEncoding];
NSLog(@"%@",ChunkHeaderAddded);
CountValue = CountValue + 1;
Boolean boolValue = (self.ConnectingPeripheral.canSendWriteWithoutResponse);
if (!boolValue) {
[EmptyReceiveImagedata insertObject:ChunkHeaderAddded atIndex:0];
// return;
}
[self.ConnectingPeripheral writeValue:ChunkHeaderAddded forCharacteristic:self.characterstics type:CBCharacteristicWriteWithoutResponse];
self.sendDataIndex += amountToSend;
}
if (self.completionFlag == false) {
self.sendDataIndex = 0;
NSLog(@"CountOf ---> %lu",(unsigned long)EmptyReceiveImagedata.count);
while (EmptyReceiveImagedata.count > self.sendDataIndex) {
NSLog(@"sendData ---> %ld",(long)self.sendDataIndex);
// Boolean boolValue = (self.ConnectingPeripheral.canSendWriteWithoutResponse);
// if (!boolValue) {
// return;
// }
[self.ConnectingPeripheral writeValue:[EmptyReceiveImagedata objectAtIndex:self.sendDataIndex] forCharacteristic:self.characterstics type:CBCharacteristicWriteWithoutResponse];
self.sendDataIndex = self.sendDataIndex + 1;
}
float count = (10 * self.sendDataIndex)/ self.dataToSend.length;
completion = count / 10;
[_BleDelegate progressBarCallback: completion];
NSData *Eom = [@"Completed" dataUsingEncoding:NSUTF8StringEncoding];
[self.ConnectingPeripheral writeValue:Eom forCharacteristic:self.characterstics type:CBCharacteristicWriteWithoutResponse];
[_BleDelegate connnectingStatus:false];
[_BleDelegate didCompleteStatus];
self.completionFlag = true;
[self.ConnectingPeripheral setNotifyValue:YES forCharacteristic:self.characterstics];
NSLog(@"SentAll the packets");
[self Notification:@"Sent all the packets"];
completion = 0.0;
}How to resend the packets which are not sent when transferring data from central to peripherals using WriteWithoutResponse ?
