diff --git a/include/btstack/run_loop.h b/include/btstack/run_loop.h
index ddb2d856a..9e31cdaec 100644
--- a/include/btstack/run_loop.h
+++ b/include/btstack/run_loop.h
@@ -98,7 +98,9 @@ void run_loop_execute(void);
 uint32_t embedded_get_ticks(void);
 uint32_t embedded_ticks_for_ms(uint32_t time_in_ms);
 #endif
-    
+#ifdef EMBEDDED
+void     embedded_trigger(void);    
+#endif
 #if defined __cplusplus
 }
 #endif
diff --git a/src/hci_transport_h4_dma.c b/src/hci_transport_h4_dma.c
index 8203c31f0..61b9dea34 100644
--- a/src/hci_transport_h4_dma.c
+++ b/src/hci_transport_h4_dma.c
@@ -190,6 +190,8 @@ static void h4_block_received(void){
         case H4_W4_PAYLOAD:
             h4_state = H4_PACKET_RECEIVED;
             bytes_to_read = 0;
+            // trigger run loop
+            embedded_trigger();
             break;
             
         default:
@@ -212,6 +214,8 @@ static void h4_block_sent(void){
             break;
         case TX_W4_PACKET_SENT:
             tx_state = TX_DONE;
+            // trigger run loop
+            embedded_trigger();
             break;
         default:
             break;