diff --git a/src/CHANGES.md b/src/CHANGES.md
index b1e93d32..29a3fb41 100644
--- a/src/CHANGES.md
+++ b/src/CHANGES.md
@@ -1,5 +1,8 @@
 # Development Changes
 
+## 0.8.110 - 2024-04-11
+* revert CMT2300A changes #1553
+
 ## 0.8.109 - 2024-04-09
 * fix hal patch
 
diff --git a/src/defines.h b/src/defines.h
index 7e050bb4..e7eecc00 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -13,7 +13,7 @@
 //-------------------------------------
 #define VERSION_MAJOR       0
 #define VERSION_MINOR       8
-#define VERSION_PATCH       108
+#define VERSION_PATCH       110
 //-------------------------------------
 typedef struct {
     uint8_t ch;
diff --git a/src/hms/cmt2300a.h b/src/hms/cmt2300a.h
index 61b26894..ed3aab54 100644
--- a/src/hms/cmt2300a.h
+++ b/src/hms/cmt2300a.h
@@ -248,12 +248,14 @@ class Cmt2300a {
         }
 
         CmtStatus tx(uint8_t buf[], uint8_t len) {
+            if(mTxPending)
+                return CmtStatus::ERR_TX_PENDING;
+
             if(mInRxMode) {
                 mInRxMode = false;
                 if(!cmtSwitchStatus(CMT2300A_GO_STBY, CMT2300A_STA_STBY))
                     return CmtStatus::ERR_SWITCH_STATE;
             }
-            mTxPending = false; // safety
 
             mSpi.writeReg(CMT2300A_CUS_INT1_CTL, CMT2300A_INT_SEL_TX_DONE);