diff --git a/software/gr-caribouLite/lib/caribouLiteSource_impl.cc b/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
index 243b328..665c2f2 100644
--- a/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
+++ b/software/gr-caribouLite/lib/caribouLiteSource_impl.cc
@@ -86,6 +86,11 @@ namespace gr {
             _radio->StartReceiving();
         }
 
+        uint64_t caribouLiteSource_impl::getHandle() const
+        {
+            return (uint64_t)((void*)(_radio));
+        }
+
         // virtual destructor
         //-------------------------------------------------------------------------------------------------------------
         caribouLiteSource_impl::~caribouLiteSource_impl()
@@ -100,13 +105,17 @@ namespace gr {
         {
             auto out_samples = static_cast<gr_complex*>(output_items[0]);
             auto out_meta = _provide_meta == true ? static_cast<uint8_t*>(output_items[1]) : (uint8_t*) NULL ;
-            int ret = _radio->ReadSamples(out_samples, static_cast<size_t>(noutput_items), out_meta);
-            
-            if (ret <= 0) 
+            int read_samples = _radio->ReadSamples(out_samples, static_cast<size_t>(noutput_items), out_meta);
+            if (read_samples <= 0) { return 0;}
+
+            for (int i = 0; i < read_samples; i++)
             {
-                return 0;
+                if (out_meta[i] == 1) {
+                    add_item_tag(0, i, pmt::string_to_symbol("pps") ,pmt::from_bool(true));
+                }
             }
-            return ret;
+            
+            return read_samples;
         }
 
     } /* namespace caribouLite */
diff --git a/software/gr-caribouLite/lib/caribouLiteSource_impl.h b/software/gr-caribouLite/lib/caribouLiteSource_impl.h
index 27bdb53..6081a21 100644
--- a/software/gr-caribouLite/lib/caribouLiteSource_impl.h
+++ b/software/gr-caribouLite/lib/caribouLiteSource_impl.h
@@ -48,6 +48,8 @@ namespace gr
                 gr_vector_const_void_star &input_items,
                 gr_vector_void_star &output_items
             );
+
+            uint64_t caribouLiteSource_impl::getHandle() const;
         };
 
     } // namespace caribouLite