diff --git a/lib/libesp32/Berry/default/berry_conf.h b/lib/libesp32/Berry/default/berry_conf.h
index 3360b9082..e11d6c3cb 100644
--- a/lib/libesp32/Berry/default/berry_conf.h
+++ b/lib/libesp32/Berry/default/berry_conf.h
@@ -100,6 +100,12 @@
  **/
 #define BE_STACK_FREE_MIN               20
 
+/* Macro: BE_STACK_START
+ * Set the starting size of the stack at VM creation.
+ * Default: 50
+ **/
+#define BE_STACK_START                  100
+
 /* Macro: BE_CONST_SEARCH_SIZE
  * Constants in function are limited to 255. However the compiler
  * will look for a maximum of pre-existing constants to avoid
diff --git a/lib/libesp32/Berry/default/embedded/autoconf.be b/lib/libesp32/Berry/default/embedded/autoconf.be
index 3f9586e04..a30ed2044 100644
--- a/lib/libesp32/Berry/default/embedded/autoconf.be
+++ b/lib/libesp32/Berry/default/embedded/autoconf.be
@@ -293,6 +293,7 @@ autoconf_module.init = def (m)
       self._error = nil
     end
 
+    # called by the synthetic event `preinit`
     def preinit()
       if self._archive == nil  return end
       # try to launch `preinit.be`
@@ -327,6 +328,7 @@ autoconf_module.init = def (m)
       end
     end
 
+    # called by the synthetic event `autoexec`
     def autoexec()
       if self._archive == nil  return end
       # try to launch `preinit.be`
diff --git a/lib/libesp32/Berry/src/be_vm.c b/lib/libesp32/Berry/src/be_vm.c
index ac2ede585..48834910e 100644
--- a/lib/libesp32/Berry/src/be_vm.c
+++ b/lib/libesp32/Berry/src/be_vm.c
@@ -453,8 +453,8 @@ BERRY_API bvm* be_vm_new(void)
     be_stack_init(vm, &vm->refstack, sizeof(binstance*));
     be_stack_init(vm, &vm->exceptstack, sizeof(struct bexecptframe));
     be_stack_init(vm, &vm->tracestack, sizeof(bcallsnapshot));
-    vm->stack = be_malloc(vm, sizeof(bvalue) * BE_STACK_FREE_MIN);
-    vm->stacktop = vm->stack + BE_STACK_FREE_MIN;
+    vm->stack = be_malloc(vm, sizeof(bvalue) * BE_STACK_START);
+    vm->stacktop = vm->stack + BE_STACK_START;
     vm->reg = vm->stack;
     vm->top = vm->reg;
     be_globalvar_init(vm);
diff --git a/tasmota/xdrv_52_9_berry.ino b/tasmota/xdrv_52_9_berry.ino
index 46cc5692f..84a7b962a 100644
--- a/tasmota/xdrv_52_9_berry.ino
+++ b/tasmota/xdrv_52_9_berry.ino
@@ -241,34 +241,6 @@ int32_t callBerryEventDispatcher(const char *type, const char *cmd, int32_t idx,
   return ret;
 }
 
-// call a method in autoconf
-int32_t callBerryAutoconf(const char * method) {
-  int32_t ret = 0;
-  bvm *vm = berry.vm;
-
-  if (nullptr == vm) { return ret; }
-  checkBeTop();
-  be_getglobal(vm, "autoconf");
-  if (!be_isnil(vm, -1)) {
-    be_getmethod(vm, -1, method);
-    if (!be_isnil(vm, -1)) {
-      be_pushvalue(vm, -2);
-      BrTimeoutStart();
-      ret = be_pcall(vm, 1);   // 1 arg
-      BrTimeoutReset();
-      if (ret != 0) {
-        BerryDumpErrorAndClear(vm, false);  // log in Tasmota console only
-        return ret;
-      }
-      be_pop(vm, 1);  // remove instance
-    }
-    be_pop(vm, 1);  // remove method
-  }
-  be_pop(vm, 1);  // remove instance object
-  checkBeTop();
-  return ret;
-}
-
 /*********************************************************************************************\
  * VM Observability
 \*********************************************************************************************/
@@ -364,9 +336,9 @@ void BerryInit(void) {
     AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_BERRY "Berry initialized, RAM used=%u"), callBerryGC());
     berry_init_ok = true;
 
-    // Run 'autoconf.preinit()'
-    callBerryAutoconf("preinit");
-
+    // we generate a synthetic event `autoexec` 
+    callBerryEventDispatcher(PSTR("preinit"), nullptr, 0, nullptr);
+    
     // Run pre-init
     BrLoad("preinit.be");    // run 'preinit.be' if present
   } while (0);
@@ -790,9 +762,6 @@ bool Xdrv52(uint8_t function)
     //   break;
     case FUNC_LOOP:
       if (!berry.autoexec_done) {
-        // Run 'autoconf.preinit()'
-        callBerryAutoconf("autoexec");
-
         // we generate a synthetic event `autoexec` 
         callBerryEventDispatcher(PSTR("autoexec"), nullptr, 0, nullptr);