wled · mrv96 · Aug 26, 2025 · Aug 26, 2025 · Aug 28, 2025 · Sep 1, 2025
diff --git a/wled00/cfg.cpp b/wled00/cfg.cpp
@@ -736,11 +736,15 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
   CJSON(DMXStartLED,dmx[F("start-led")]);
 
   JsonArray dmx_fixmap = dmx[F("fixmap")];
-  for (int i = 0; i < dmx_fixmap.size(); i++) {
-    if (i > 14) break;
+  for (int i = 0; i < MIN(dmx_fixmap.size(), WLED_DMX_MAX_CHANNELS_PER_FIXTURE); i++) {
     CJSON(DMXFixtureMap[i],dmx_fixmap[i]);
   }
 
+  JsonArray dmx_chsval = dmx[F("chsval")];
+  for (int i = 0; i < MIN(dmx_chsval.size(), WLED_DMX_MAX_CHANNELS_PER_FIXTURE); i++) {
+    CJSON(DMXChannelsValue[i],dmx_chsval[i]);
+  }
+
   CJSON(e131ProxyUniverse, dmx[F("e131proxy")]);
   #endif
 
@@ -1237,10 +1241,15 @@ void serializeConfig(JsonObject root) {
   dmx[F("start-led")] = DMXStartLED;
 
   JsonArray dmx_fixmap = dmx.createNestedArray(F("fixmap"));
-  for (unsigned i = 0; i < 15; i++) {
+  for (unsigned i = 0; i < WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
     dmx_fixmap.add(DMXFixtureMap[i]);
   }
 
+  JsonArray dmx_chsval = dmx.createNestedArray(F("chsval"));
+  for (unsigned i = 0; i < WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
+    dmx_chsval.add(DMXChannelsValue[i]);
+  }
+
   dmx[F("e131proxy")] = e131ProxyUniverse;
   #endif
 

diff --git a/wled00/const.h b/wled00/const.h
@@ -686,4 +686,6 @@ static_assert(WLED_MAX_BUSSES <= 32, "WLED_MAX_BUSSES exceeds hard limit");
 
 #define WLED_O2_ATTR __attribute__((optimize("O2")))
 
+#define WLED_DMX_MAX_CHANNELS_PER_FIXTURE 15
+
 #endif
diff --git a/wled00/data/settings_dmx.htm b/wled00/data/settings_dmx.htm
@@ -15,10 +15,20 @@
 		document.head.appendChild(l);
 	})();
 	function HW(){window.open("https://kno.wled.ge/interfaces/dmx-output/");}
-	function GCH(num) {
+	function GCH(num){
 		gId('dmxchannels').innerHTML += "";
 		for (i=0;i<num;i++) {
-			gId('dmxchannels').innerHTML += "<span id=CH" + (i+1) + "s >Channel " + (i+1) + ": <select name=CH" + (i+1) + " id=\"CH" + (i+1) + "\"><option value=0>Set to 0</option><option value=1>Red</option><option value=2>Green</option><option value=3>Blue</option><option value=4>White</option><option value=5>Shutter (Brightness)</option><option value=6>Set to 255</option></select></span><br />\n";
+			gId('dmxchannels').innerHTML += "<span id=CH" + (i+1) + "s >Channel " + (i+1) + ": <select name=CH" + (i+1) + " id=\"CH" + (i+1) + "\"><option value=0>Set to </option><option value=1>Red</option><option value=2>Green</option><option value=3>Blue</option><option value=4>White</option><option value=5>Shutter (Brightness)</option></select><input name=DV" + (i+1) + " id=\"DV" + (i+1) + "\" type=number min=0 max=255></span><br />\n";
+		}
+		for (i=0;i<num;i++) {
+			const dv = gId("DV" + (i+1));
+			gId("CH" + (i+1)).addEventListener("change", (event) => {
+				if (event.target.value == 0) {
+					dv.style.display = "inline";
+				} else {
+					dv.style.display = "none";
+				}
+			});
 		}
 	}
 	function mMap(){
@@ -30,14 +40,17 @@
 			gId("gapwarning").style.display="none";
 		}
 		for (i=0;i<15;i++) {
+			const ch = gId("CH" + (i+1));
 			if (i>=numCh) {
 				gId("CH"+(i+1) + "s").style.opacity = "0.5";
-				gId("CH"+(i+1)).disabled = true;
-
+				ch.disabled = true;
+				gId("DV"+(i+1)).disabled = true;
 			} else {
 				gId("CH"+(i+1) + "s").style.opacity = "1";
-				gId("CH"+(i+1)).disabled = false;
+				ch.disabled = false;
+				gId("DV"+(i+1)).disabled = false;
 			}
+			ch.dispatchEvent(new Event("change"));
 		}
 	}
 	function S(){

diff --git a/wled00/dmx_output.cpp b/wled00/dmx_output.cpp
@@ -40,8 +40,8 @@ void handleDMXOutput()
     for (int j = 0; j < DMXChannels; j++) {
       int DMXAddr = DMXFixtureStart + j;
       switch (DMXFixtureMap[j]) {
-        case 0:        // Set this channel to 0. Good way to tell strobe- and fade-functions to fuck right off.
-          dmx.write(DMXAddr, 0);
+        case 0:        // Set this channel to the selected value (custom DV per channel).
+          dmx.write(DMXAddr, DMXChannelsValue[j]);
           break;
         case 1:        // Red
           dmx.write(DMXAddr, calc_brightness ? (r * brightness) / 255 : r);
@@ -58,7 +58,7 @@ void handleDMXOutput()
         case 5:        // Shutter channel. Controls the brightness.
           dmx.write(DMXAddr, brightness);
           break;
-        case 6:        // Sets this channel to 255. Like 0, but more wholesome.
+        case 6:        // Legacy: "Set to 255" (pre-custom DV). Keep for backward-compatibility.
           dmx.write(DMXAddr, 255);
           break;
       }

diff --git a/wled00/set.cpp b/wled00/set.cpp
@@ -640,11 +640,16 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
     if (t>=0 && t < MAX_LEDS) {
       DMXStartLED = t;
     }
-    for (int i=0; i<15; i++) {
+    for (int i=0; i<WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
       String argname = "CH" + String((i+1));
       t = request->arg(argname).toInt();
       DMXFixtureMap[i] = t;
     }
+    for (int i=0; i<WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
+      String argname = "DV" + String((i+1));
+      t = request->arg(argname).toInt();
+      DMXChannelsValue[i] = constrain(t, 0, 255);
+    }
   }
   #endif
 

diff --git a/wled00/wled.h b/wled00/wled.h
@@ -462,7 +462,8 @@ WLED_GLOBAL bool arlsForceMaxBri _INIT(false);                    // enable to f
   WLED_GLOBAL uint16_t e131ProxyUniverse _INIT(0);                  // output this E1.31 (sACN) / ArtNet universe via MAX485 (0 = disabled)
   // dmx CONFIG
   WLED_GLOBAL byte DMXChannels _INIT(7);        // number of channels per fixture
-  WLED_GLOBAL byte DMXFixtureMap[15] _INIT_N(({ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }));
+  WLED_GLOBAL byte DMXFixtureMap[WLED_DMX_MAX_CHANNELS_PER_FIXTURE] _INIT_N(({ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }));
+  WLED_GLOBAL byte DMXChannelsValue[WLED_DMX_MAX_CHANNELS_PER_FIXTURE] _INIT_N(({ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }));
   // assigns the different channels to different functions. See wled21_dmx.ino for more information.
   WLED_GLOBAL uint16_t DMXGap _INIT(10);          // gap between the fixtures. makes addressing easier because you don't have to memorize odd numbers when climbing up onto a rig.
   WLED_GLOBAL uint16_t DMXStart _INIT(10);        // start address of the first fixture

diff --git a/wled00/wled_server.cpp b/wled00/wled_server.cpp
@@ -1,7 +1,7 @@
 #include "wled.h"
 
 #ifndef WLED_DISABLE_OTA
-  #include "ota_update.h"  
+  #include "ota_update.h"
 #endif
 #include "html_ui.h"
 #include "html_settings.h"
@@ -144,10 +144,15 @@ static String dmxProcessor(const String& var)
     mapJS += F(";\nLC=");
     mapJS += String(strip.getLengthTotal());
     mapJS += F(";\nvar CH=[");
-    for (int i=0; i<15; i++) {
+    for (int i=0; i<WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
       mapJS += String(DMXFixtureMap[i]) + ',';
     }
     mapJS += F("0];");
+    mapJS += F(";\nvar DV=[");
+    for (int i=0; i<WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
+      mapJS += String(DMXChannelsValue[i]) + ',';
+    }
+    mapJS += F("0];");
   }
   return mapJS;
 }
@@ -336,7 +341,7 @@ void initServer()
   DefaultHeaders::Instance().addHeader(F("Access-Control-Allow-Headers"), "*");
 
 #ifdef WLED_ENABLE_WEBSOCKETS
-  #ifndef WLED_DISABLE_2D 
+  #ifndef WLED_DISABLE_2D
   server.on(F("/liveview2D"), HTTP_GET, [](AsyncWebServerRequest *request) {
     handleStaticContent(request, "", 200, FPSTR(CONTENT_TYPE_HTML), PAGE_liveviewws2D, PAGE_liveviewws2D_length);
   });
@@ -502,15 +507,15 @@ void initServer()
       serveMessage(request, 500, F("Update failed!"), F("Internal server fault"), 254);
     }
   },[](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool isFinal){
-    if (index == 0) { 
+    if (index == 0) {
       // Allocate the context structure
       if (!initOTA(request)) {
         return; // Error will be dealt with after upload in response handler, above
       }
 
       // Privilege checks
       IPAddress client  = request->client()->remoteIP();
-      if (((otaSameSubnet && !inSameSubnet(client)) && !strlen(settingsPIN)) || (!otaSameSubnet && !inLocalSubnet(client))) {        
+      if (((otaSameSubnet && !inSameSubnet(client)) && !strlen(settingsPIN)) || (!otaSameSubnet && !inLocalSubnet(client))) {
         DEBUG_PRINTLN(F("Attempted OTA update from different/non-local subnet!"));
         serveMessage(request, 401, FPSTR(s_accessdenied), F("Client is not on local subnet."), 254);
         setOTAReplied(request);
@@ -525,7 +530,7 @@ void initServer()
         serveMessage(request, 401, FPSTR(s_accessdenied), FPSTR(s_unlock_ota), 254);
         setOTAReplied(request);
         return;
-      }      
+      }
     }
 
     handleOTAData(request, index, data, len, isFinal);
@@ -693,7 +698,7 @@ void serveSettingsJS(AsyncWebServerRequest* request)
     request->send_P(401, FPSTR(CONTENT_TYPE_JAVASCRIPT), PSTR("alert('PIN incorrect.');"));
     return;
   }
-  
+
   AsyncResponseStream *response = request->beginResponseStream(FPSTR(CONTENT_TYPE_JAVASCRIPT));
   response->addHeader(FPSTR(s_cache_control), FPSTR(s_no_store));
   response->addHeader(FPSTR(s_expires), F("0"));

diff --git a/wled00/xml.cpp b/wled00/xml.cpp
@@ -413,7 +413,7 @@ void getSettingsJS(byte subPage, Print& settingsScript)
 #ifndef WLED_DISABLE_INFRARED
     printSetFormValue(settingsScript,PSTR("IR"),irPin);
     printSetFormValue(settingsScript,PSTR("IT"),irEnabled);
-#endif    
+#endif
     printSetFormCheckbox(settingsScript,PSTR("MSO"),!irApplyToAllSelected);
   }
 
@@ -637,21 +637,17 @@ void getSettingsJS(byte subPage, Print& settingsScript)
     printSetFormValue(settingsScript,PSTR("CS"),DMXStart);
     printSetFormValue(settingsScript,PSTR("SL"),DMXStartLED);
 
-    printSetFormIndex(settingsScript,PSTR("CH1"),DMXFixtureMap[0]);
-    printSetFormIndex(settingsScript,PSTR("CH2"),DMXFixtureMap[1]);
-    printSetFormIndex(settingsScript,PSTR("CH3"),DMXFixtureMap[2]);
-    printSetFormIndex(settingsScript,PSTR("CH4"),DMXFixtureMap[3]);
-    printSetFormIndex(settingsScript,PSTR("CH5"),DMXFixtureMap[4]);
-    printSetFormIndex(settingsScript,PSTR("CH6"),DMXFixtureMap[5]);
-    printSetFormIndex(settingsScript,PSTR("CH7"),DMXFixtureMap[6]);
-    printSetFormIndex(settingsScript,PSTR("CH8"),DMXFixtureMap[7]);
-    printSetFormIndex(settingsScript,PSTR("CH9"),DMXFixtureMap[8]);
-    printSetFormIndex(settingsScript,PSTR("CH10"),DMXFixtureMap[9]);
-    printSetFormIndex(settingsScript,PSTR("CH11"),DMXFixtureMap[10]);
-    printSetFormIndex(settingsScript,PSTR("CH12"),DMXFixtureMap[11]);
-    printSetFormIndex(settingsScript,PSTR("CH13"),DMXFixtureMap[12]);
-    printSetFormIndex(settingsScript,PSTR("CH14"),DMXFixtureMap[13]);
-    printSetFormIndex(settingsScript,PSTR("CH15"),DMXFixtureMap[14]);
+    for (int i = 0; i < WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
+      char buf[5];
+      snprintf_P(buf, sizeof(buf), PSTR("CH%d"), i+1);
+      printSetFormIndex(settingsScript,buf,DMXFixtureMap[i]);
+    }
+
+    for (int i = 0; i < WLED_DMX_MAX_CHANNELS_PER_FIXTURE; i++) {
+      char buf[5];
+      snprintf_P(buf, sizeof(buf), PSTR("DV%d"), i+1);
+      printSetFormValue(settingsScript,buf,DMXChannelsValue[i]);
+    }
   }
   #endif
Original file line number	Diff line number	Diff line change
Expand Up		@@ -686,4 +686,6 @@ static_assert(WLED_MAX_BUSSES <= 32, "WLED_MAX_BUSSES exceeds hard limit");

		#define WLED_O2_ATTR __attribute__((optimize("O2")))

		#define WLED_DMX_MAX_CHANNELS_PER_FIXTURE 15

		#endif