Confirmed uplink lorawan-frame with ack: false, is this correct?


#1

Hi,

I am my end device is sending confirmed uplink messages. I am looking at device lorawan frames and the ack is always false for the messages. Is this the correct behavior? I was thinking ack would be set to true.
Plus I see the corresponding downlink is unconfirmed downlink message. Thanks in advance.


#2

Yes, this is correct. the ACK indicates the acknowledged of a confirmed data frame. So in response of an uplink confirmed frame you would see a downlink frame with ack = true.


#3

@brocaar ok thanks,

So the confirmed updata will have ack false,
then its corresponding downlink or DataDown should have ack=true (yes that’s happening). But why is that downlink called unconfirmedDataDown. Should it not be called confirmedDataDown?


#4

No, as that would require the device to ACK the ACK if the same would be true for a device ACKing a downlink. Please refer to the LoRaWAN specs for more information on this.


#5

understood, thank you.