diff --git a/lib/channel/GwChannelList.cpp b/lib/channel/GwChannelList.cpp
index 87755b4..d89f227 100644
--- a/lib/channel/GwChannelList.cpp
+++ b/lib/channel/GwChannelList.cpp
@@ -15,8 +15,10 @@ class SerInit{
         int tx=-1;
         int mode=-1;
         int fixedBaud=-1;
-        SerInit(int s,int r,int t, int m, int b=-1):
-            serial(s),rx(r),tx(t),mode(m),fixedBaud(b){}
+        int ena=-1;
+        int elow=1;
+        SerInit(int s,int r,int t, int m, int b=-1,int en=-1,int el=-1):
+            serial(s),rx(r),tx(t),mode(m),fixedBaud(b),ena(en),elow(el){}
 };
 std::vector<SerInit> serialInits;
 
@@ -47,11 +49,20 @@ static int typeFromMode(const char *mode){
 #ifndef GWSERIAL_RX
 #define GWSERIAL_RX -1
 #endif
+#ifndef GWSERIAL_ENA
+#define GWSERIAL_ENA -1
+#endif
+#ifndef GWSERIAL_ELO
+#define GWSERIAL_ELO 1
+#endif
+#ifndef GWSERIAL_BAUD
+#define GWSERIAL_BAUD -1
+#endif
 #ifdef GWSERIAL_TYPE
-    CFG_SERIAL(SERIAL1_CHANNEL_ID, GWSERIAL_RX, GWSERIAL_TX, GWSERIAL_TYPE)
+    CFG_SERIAL(SERIAL1_CHANNEL_ID, GWSERIAL_RX, GWSERIAL_TX, GWSERIAL_TYPE,GWSERIAL_BAUD,GWSERIAL_ENA,GWSERIAL_ELO)
 #else
 #ifdef GWSERIAL_MODE
-CFG_SERIAL(SERIAL1_CHANNEL_ID, GWSERIAL_RX, GWSERIAL_TX, typeFromMode(GWSERIAL_MODE))
+CFG_SERIAL(SERIAL1_CHANNEL_ID, GWSERIAL_RX, GWSERIAL_TX, typeFromMode(GWSERIAL_MODE),GWSERIAL_BAUD,GWSERIAL_ENA,GWSERIAL_ELO)
 #endif
 #endif
     // serial 2
@@ -61,11 +72,20 @@ CFG_SERIAL(SERIAL1_CHANNEL_ID, GWSERIAL_RX, GWSERIAL_TX, typeFromMode(GWSERIAL_M
 #ifndef GWSERIAL2_RX
 #define GWSERIAL2_RX -1
 #endif
+#ifndef GWSERIAL2_ENA
+#define GWSERIAL2_ENA -1
+#endif
+#ifndef GWSERIAL2_ELO
+#define GWSERIAL2_ELO 1
+#endif
+#ifndef GWSERIAL2_BAUD
+#define GWSERIAL2_BAUD -1
+#endif
 #ifdef GWSERIAL2_TYPE
-    CFG_SERIAL(SERIAL2_CHANNEL_ID, GWSERIAL2_RX, GWSERIAL2_TX, GWSERIAL2_TYPE)
+    CFG_SERIAL(SERIAL2_CHANNEL_ID, GWSERIAL2_RX, GWSERIAL2_TX, GWSERIAL2_TYPE,GWSERIAL2_BAUD,GWSERIAL2_ENA,GWSERIAL2_ELO)
 #else
 #ifdef GWSERIAL2_MODE
-CFG_SERIAL(SERIAL2_CHANNEL_ID, GWSERIAL2_RX, GWSERIAL2_TX, typeFromMode(GWSERIAL2_MODE))
+CFG_SERIAL(SERIAL2_CHANNEL_ID, GWSERIAL2_RX, GWSERIAL2_TX, typeFromMode(GWSERIAL2_MODE),GWSERIAL2_BAUD,GWSERIAL2_ENA,GWSERIAL2_ELO)
 #endif
 #endif
     class GwSerialLog : public GwLogWriter
@@ -300,7 +320,7 @@ static ChannelParam * findChannelParam(int id){
     return param;
 }
 
-static GwSerial * createSerialImpl(GwConfigHandler *config,GwLog *logger, int idx,int type,int rx,int tx, bool setLog){
+static GwSerial * createSerialImpl(GwConfigHandler *config,GwLog *logger, int idx,int type,int rx,int tx, bool setLog,int ena=-1,int elow=1){
     LOG_DEBUG(GwLog::DEBUG,"create serial: channel=%d, rx=%d,tx=%d",
         idx,rx,tx);
     ChannelParam *param=findChannelParam(idx);
@@ -325,6 +345,24 @@ static GwSerial * createSerialImpl(GwConfigHandler *config,GwLog *logger, int id
         LOG_DEBUG(GwLog::ERROR,"invalid serial config with id %d",param->id);
         return nullptr;
     }
+    if (ena >= 0){
+        if (type == GWSERIAL_TYPE_UNI){
+             String cfgMode=config->getString(param->direction);
+             int value=0;
+             if (cfgMode == "send"){
+                value=elow?0:1;
+             } 
+             else{
+                value=elow?1:0;
+             }
+             LOG_DEBUG(GwLog::LOG,"serial %d: setting output enable %d to %d",param->id,ena,value);
+             pinMode(ena,OUTPUT); 
+             digitalWrite(ena,value); 
+        }
+        else{
+            LOG_DEBUG(GwLog::ERROR,"serial %d: output enable ignored for mode %d",param->id, type);
+        }
+    }
     serialStream->begin(config->getInt(param->baud,115200),SERIAL_8N1,rx,tx);
     if (setLog){
         logger->setWriter(new GwSerialLog(serialStream,config->getBool(param->preventLog,false)));
@@ -446,7 +484,7 @@ void GwChannelList::begin(bool fallbackSerial){
     //new serial config handling
     for (auto &&init:serialInits){
         LOG_INFO("creating serial channel %d, rx=%d,tx=%d,type=%d",init.serial,init.rx,init.tx,init.mode);
-        GwSerial *ser=createSerialImpl(config,logger,init.serial,init.mode,init.rx,init.tx,false);
+        GwSerial *ser=createSerialImpl(config,logger,init.serial,init.mode,init.rx,init.tx,false,init.ena,init.elow);
         if (ser != nullptr){
             channel=createChannel(logger,config,init.serial,ser);
             if (channel != nullptr){
diff --git a/webinstall/build.yaml b/webinstall/build.yaml
index ab2ca3c..61ddf19 100644
--- a/webinstall/build.yaml
+++ b/webinstall/build.yaml
@@ -339,6 +339,26 @@ types:
     help: 'number of the GPIO pin for the transmit function'
     target: "define:#serial#TX"
     mandatory: true
+  - &serialEnablePin
+    <<: *gpiopin
+    key: ENA
+    label: "enable pin"
+    help: "GPIO pin for output enable"
+    target: "define:#serial#ENA"
+    mandatory: false
+  - &serialEnableLow
+    type: checkbox
+    key: ELOW
+    label: "enable low"
+    target: "define:#serial#ELO"
+    default: true
+    help: "set: low on enable pin for output, unset: high on enable pin for output"
+    values:
+    - key: true
+      value: 1
+    - key: false
+      value: 0
+
   - &serialValues
       - key: true
         children:
@@ -355,6 +375,8 @@ types:
               children:
                 - *serialRX
                 - *serialTX
+                - *serialEnablePin
+                - *serialEnableLow
             - key: bi
               value: 2
               label: "BiDir"