diff --git a/HeishaMon/decode.h b/HeishaMon/decode.h
index d2872f7b..01e0a523 100644
--- a/HeishaMon/decode.h
+++ b/HeishaMon/decode.h
@@ -42,7 +42,7 @@ static const char _unknown[] PROGMEM = "unknown";
 
 
 
-#define NUMBER_OF_TOPICS 142 //last topic number + 1
+#define NUMBER_OF_TOPICS 143 //last topic number + 1
 #define NUMBER_OF_TOPICS_EXTRA 6 //last topic number + 1
 #define NUMBER_OF_OPT_TOPICS 7 //last topic number + 1
 #define MAX_TOPIC_LEN 42 // max length + 1
@@ -218,6 +218,7 @@ static const char topics[][MAX_TOPIC_LEN] PROGMEM = {
   "Heating_Control",         //TOP139
   "Smart_DHW",               //TOP140
   "Quiet_Mode_Priority",     //TOP141
+  "Expansion_Valve",         //TOP142
 };
 
 static const byte topicBytes[] PROGMEM = { //can store the index as byte (8-bit unsigned humber) as there aren't more then 255 bytes (actually only 203 bytes) to decode
@@ -363,6 +364,7 @@ static const byte topicBytes[] PROGMEM = { //can store the index as byte (8-bit
   30,    //TOP139
   24,    //TOP140
   11,    //TOP141
+  175,   //TOP142
 };
 
 
@@ -520,6 +522,7 @@ static const topicFP topicFunctions[] PROGMEM = {
   getBit5and6,       //TOP139
   getBit1and2,       //TOP140
   getBit3and4,       //TOP141
+  getIntMinus1,      //TOP142
 };
 
 static const char *DisabledEnabled[] PROGMEM = {"2", "Disabled", "Enabled"};
@@ -560,6 +563,7 @@ static const char *Model[] PROGMEM = {"0", "Model"};
 static const char *HeatingControl[] PROGMEM = {"2", "Comfort", "Efficiency"};
 static const char *SmartDHW[] PROGMEM = {"2", "Variable", "Standard"};
 static const char *QuietModePriority[] PROGMEM = {"2", "Sound", "Capacity"};
+static const char *Steps[] PROGMEM = {"0", "Steps"};
 
 static const char **opttopicDescription[] PROGMEM = {
   OffOn,          //OPT0
@@ -723,4 +727,5 @@ static const char **topicDescription[] PROGMEM = {
   HeatingControl,  //TOP139
   SmartDHW,        //TOP140
   QuietModePriority, //TOP141
+  Steps,             //TOP142
 };
diff --git a/MQTT-Topics.md b/MQTT-Topics.md
index bfecc596..d4ea5fb2 100644
--- a/MQTT-Topics.md
+++ b/MQTT-Topics.md
@@ -158,6 +158,7 @@ TOP138 | main/Bivalent_Advanced_DHW_Delay	 | Bivalent adv. par. DHW delay
 TOP139 | main/Heating_Control | Heating Control
 TOP140 | main/Smart_DHW | Smart DHW
 TOP141 | main/Quiet_Mode_Priority | Quiet Mode Priority (0=sound, 1=capacity)
+TOP142 | main/Expansion_Valve | Expansion Valve (Steps)
 
 
 
diff --git a/ProtocolByteDecrypt.md b/ProtocolByteDecrypt.md
index a3d7e7cb..e4358524 100644
--- a/ProtocolByteDecrypt.md
+++ b/ProtocolByteDecrypt.md
@@ -177,7 +177,7 @@
 |  TOP93 | 172 | 51 | Convert to DEC X-1   | Pump Duty [duty] |
 |  TOP62 | 173 | 59 | Convert to DEC (X-1) X10  | Fan 1 Motor Speed [R/Min] |
 |  TOP63 | 174 | 01 | Convert to DEC (X-1) X10  | Fan 2 Motor Speed [R/Min] |
-|  TOP | 175 | 36 | Convert to DEC -1  | ?Possible EEV valve (PID) |
+|  TOP142 | 175 | 36 | Convert to DEC -1  | Expansion Valve [Steps] |
 |  TOP | 176 | 79 | Convert to DEC -1  | ?Possible ByPass valve |
 |  TOP127 | 177 | 01 | Convert to DEC -1  | 2 Zone mixing valve PID |
 |  TOP128 | 178 | 01 | Convert to DEC -1  | 1 Zone mixing valve PID |