Merge pull request #1267 from PCo-IoT-2024/Feature_isFrmPending

[LoRaWAN] Add `frmPending` field in `LoRaWANEvent_t`

src/protocols/LoRaWAN/LoRaWAN.cpp

@@ -1807,6 +1807,7 @@ int16_t LoRaWANNode::parseDownlink(uint8_t* data, size_t* len, LoRaWANEvent_t* e
     event->dir = RADIOLIB_LORAWAN_DOWNLINK;
     event->confirmed = isConfirmedDown;
     event->confirming = isConfirmingUp;
+    event->frmPending = (downlinkMsg[RADIOLIB_LORAWAN_FHDR_FCTRL_POS] & RADIOLIB_LORAWAN_FCTRL_FRAME_PENDING) != 0;
     event->datarate = this->channels[RADIOLIB_LORAWAN_DOWNLINK].dr;
     event->freq = channels[event->dir].freq / 10000.0;
     event->power = this->txPowerMax - this->txPowerSteps * 2;

src/protocols/LoRaWAN/LoRaWAN.h

@@ -504,6 +504,9 @@ struct LoRaWANEvent_t {
   (e.g., server downlink reply to confirmed uplink sent by user application)*/
   bool confirming;
 
+  /*! \brief Whether further downlink messages are pending on the server side. */
+  bool frmPending;
+
   /*! \brief Datarate */
   uint8_t datarate;