diff --git a/mini-beieli-node.ino b/mini-beieli-node.ino
index 02e4521..a45ab0f 100644
--- a/mini-beieli-node.ino
+++ b/mini-beieli-node.ino
@@ -783,17 +783,37 @@ void startSendingUplink(bool firstTime)
     fConfirmed = true;
   }
 
+  gCatena.poll();
+
   if (firstTime) {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("SendBuffer firstTime\n");
     }
-    gLoRaWAN.SendBuffer((uint8_t*)&lora_data_first, sizeof(LORA_data_first), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    bool success = gLoRaWAN.SendBuffer((uint8_t*)&lora_data_first, sizeof(LORA_data_first), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    // we try a second time if not successful...
+    if (! success) {
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("SendBuffer was not successful, we try a second time...\n");
+      }
+      gCatena.poll();
+      delay(500);
+      gLoRaWAN.SendBuffer((uint8_t*)&lora_data_first, sizeof(LORA_data_first), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    }
     package_counter++;
   } else {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("SendBuffer not firstTime\n");
     }
-    gLoRaWAN.SendBuffer((uint8_t*)&lora_data, sizeof(LORA_data), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    bool success = gLoRaWAN.SendBuffer((uint8_t*)&lora_data, sizeof(LORA_data), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    // we try a second time if not successful...
+    if (! success) {
+      if (config_data.debug_level > 0) {
+        gCatena.SafePrintf("SendBuffer was not successful, we try a second time...\n");
+      }
+      gCatena.poll();
+      delay(500);
+      gLoRaWAN.SendBuffer((uint8_t*)&lora_data, sizeof(LORA_data), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    }
     package_counter++;
   }