How/When are queued packets sent in RX2 on Claas-A device?

mrX_de · June 27, 2025, 10:29am

I’m using a couple of devices based with my firmware based on RadioLib.

No matter how many downlinks are queued, i only see RX1 being used.

What am i missing?

clavisound · June 27, 2025, 12:43pm

This is good. Why this is a problem? Problem is to use only RX2.

mrX_de · June 27, 2025, 1:24pm

Not sure what you mean …

What i’m after is having 2 queued downlinks sent in on e “wakeup cycle”.

I’m looking to reduce the “latency” from a sensor node to a display node.

Jason_Reiss · June 28, 2025, 4:23pm

If a packet is received in Rx1 the second window is not opened.

See bottom of page 12.

github.com/Lora-net/LoRaMac-node

src/mac/LoRaMac.c

dcbcfb329


      
          MacCtx.McpsIndication.RxData = false;

          MacCtx.McpsIndication.AckReceived = false;

          MacCtx.McpsIndication.DownLinkCounter = 0;

          MacCtx.McpsIndication.McpsIndication = MCPS_UNCONFIRMED;

          MacCtx.McpsIndication.DevAddress = 0;

          MacCtx.McpsIndication.DeviceTimeAnsReceived = false;

          MacCtx.McpsIndication.ResponseTimeout = 0;

          

          Radio.Sleep( );

          

          if( MacCtx.McpsIndication.RxSlot == RX_SLOT_WIN_1 )

          {

              TimerStop( &MacCtx.RxWindowTimer2 );

          }

          

          // This function must be called even if we are not in class b mode yet.

          if( LoRaMacClassBRxBeacon( payload, size ) == true )

          {

              MacCtx.MlmeIndication.BeaconInfo.Rssi = rssi;

              MacCtx.MlmeIndication.BeaconInfo.Snr = snr;

              return;

mrX_de · July 1, 2025, 7:38pm

Thanks for the clarification!