can set idle_pwm from webserver, but not working properly

lib/httpserver/httpserver.cpp

@@ -60,9 +60,13 @@ void HTTPServer::start_apps() {
     // application handler
 
     this->on("/update", HTTP_POST, [this]() {
-        // Serial.printf("got /update with args()=%d\n", args());
-        for(int i=0; i<args(); i++) {
-            Serial.printf("%s=%s\n", argName(i).c_str(), arg(i).c_str());
+        if(args()) {
+            for(int i=0; i<args()-1; i++) {
+                Serial.printf("%s=%s\n", argName(i).c_str(), arg(i).c_str());
+                if(argName(i).equals("range_idl_pwm")) {
+                    treppe->set_idle_prozent(arg(i).toInt());
+                }
+            }
         }
         send(200, "text/plain", "accepted");
     });

lib/httpserver/httpserver.h

@@ -5,6 +5,7 @@
 #include <ESP8266WebServer.h>
 #include <stdarg.h>
 #include "filesys.h"
+#include "treppe.h"
 
 // debug log <ESP8266WebServer.h>
 // #define DEBUGV(f,...) do { Serial.printf(PSTR(f), ##__VA_ARGS__); } while (0)
@@ -24,10 +25,11 @@ private:
     void listRoot() {
         ls(rootDir);
     }
+    Treppe* treppe;
 
 public:
-    HTTPServer(const int _port, const char* _rootDir) :
-       ESP8266WebServer(_port), rootDir(_rootDir)
+    HTTPServer(const int _port, const char* _rootDir, Treppe* _treppe) :
+       ESP8266WebServer(_port), rootDir(_rootDir), treppe(_treppe)
     { }
     ~HTTPServer()
     {