RAk4270 Confirmed Downlink Acknowledgement

LPWAN Modules / EVBs RAK4270
1

Issue:Confirmed Downlink not acknowledged

Setup:RAK4270 Firmware V3.3.0.18

Server:TTN

Details:
The RAK4270 sends an unconfirmed uplink and the TTN Server sends down a confirmed downlink

at+send=lora:1:8100f5822d8602feB50001
OK
at+recv=6,-29,13,3:a8017a
at+set_config=device:sleep:1
OK Sleep

“500mS Later - Sending a unconfirmed uplink in response to the Confirmed Downlink”

at+set_config=device:sleep:0
OK Wake Up
at+send=lora:1:362201200100
ERROR: 80
ERROR: 94

OK , we have two errors 80,94.

Is this because I have sent the uplink too quickly ?
Or is it because I and sending an at+send on a different port number to the confirmed downlink?

Thank your for your assistance

KR
Paul Humphreys

2

Hi Paul,

The likely reason is that you are sending too quickly. The port number on uplinks and downlinks is not related to the errors you get. I am not sure what is your application that needs to send immediately an uplink that quick after a downlink but likely it will not adhere to LoRaWAN specs and might hurt the network capacity.