diff --git a/cube/User/Src/mbusComm.c b/cube/User/Src/mbusComm.c
index 50f07d9..16fc6b4 100644
--- a/cube/User/Src/mbusComm.c
+++ b/cube/User/Src/mbusComm.c
@@ -12,7 +12,6 @@ typedef enum {
     IDLE,
     SEND,
     SEND_CONT,
-    SENDING,
     SENDING_DONE,
     ENABLE_FRONTEND,
     DISABLE_FRONTEND
@@ -58,16 +57,12 @@ static void handleRequestEngine(void *handle) {
         } else {
             localMbusCommHandle->retryCnt = 0;
             HAL_UART_Transmit_IT(&mbusUart, localMbusCommHandle->sendBuf, 5);
-            localMbusCommHandle->state = SENDING;
+            // transition from here to SENDING_DONE is initiate by mbusCommTxCpltCallback
+            // interrupt callback
+            localMbusCommHandle->state = SENDING_DONE;
         }
         break;
 
-        // transition from SENDING to SENDING_DONE is initiate by mbusCommTxCpltCallback
-        // interrupt callback
-        case SENDING:
-        logMsg("hre state SENDING");
-        break;
-
         case SENDING_DONE:
         logMsg("hre state SENDING_DONE");
         localMbusCommHandle->state = ENABLE_FRONTEND;
@@ -96,10 +91,7 @@ static void handleRequestEngine(void *handle) {
 
 void mbusCommTxCpltCallback(UART_HandleTypeDef *huart) {
     logMsg("mctx: mbus tx done");
-    if (mbusCommHandle.state == SENDING) {
-        mbusCommHandle.state = SENDING_DONE;
-        schAdd(handleRequestEngine, (void*) &mbusCommHandle, 0, 0);
-    }
+    schAdd(handleRequestEngine, (void*) &mbusCommHandle, 0, 0);
 }
 
 void mbusCommRequest(uint8_t cmd, uint8_t addr) {