diff --git a/Grbl_Esp32/src/Configuration/RuntimeSetting.cpp b/Grbl_Esp32/src/Configuration/RuntimeSetting.cpp
index 0da2fcde..22591db1 100644
--- a/Grbl_Esp32/src/Configuration/RuntimeSetting.cpp
+++ b/Grbl_Esp32/src/Configuration/RuntimeSetting.cpp
@@ -18,22 +18,25 @@
 
 #include "RuntimeSetting.h"
 
+#include "../Report.h"
+
 #include <cstdlib>
 #include <atomic>
 
 namespace Configuration {
-    RuntimeSetting::RuntimeSetting(const char* runtimeSetting) : setting_(runtimeSetting + 1), start_(runtimeSetting + 1) {
+    RuntimeSetting::RuntimeSetting(const char* key, const char* value, WebUI::ESPResponseStream* out) :
+        setting_(key), start_(key), newValue_(value), out_(out) {
         // Read fence for config. Shouldn't be necessary, but better safe than sorry.
         std::atomic_thread_fence(std::memory_order::memory_order_seq_cst);
     }
 
     void RuntimeSetting::enterSection(const char* name, Configuration::Configurable* value) {
-        if (is(name) && this->value() == nullptr) {
+        if (is(name) && !isHandled_) {
             auto previous = start_;
 
             // Figure out next node
             auto next = start_;
-            for (; *next && *next != '=' && *next != '/'; ++next) {}
+            for (; *next && *next != '/'; ++next) {}
 
             // Do we have a child?
             if (*next == '/') {
@@ -49,30 +52,108 @@ namespace Configuration {
         }
     }
 
+    void RuntimeSetting::item(const char* name, bool& value) {
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%s\r\n", setting_, value ? "true" : "false");
+            } else {
+                value = (!strcmp(newValue_, "true"));
+            }
+        }
+    }
+
     void RuntimeSetting::item(const char* name, int32_t& value, int32_t minValue, int32_t maxValue) {
-        if (is(name) && this->value() != nullptr) {
-            value = atoi(this->value());
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%d\r\n", setting_, value);
+            } else {
+                value = atoi(newValue_);
+            }
         }
     }
 
     void RuntimeSetting::item(const char* name, float& value, float minValue, float maxValue) {
-        if (is(name) && this->value() != nullptr) {
-            char* floatEnd;
-            value = strtof(this->value(), &floatEnd);
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%.3f\r\n", setting_, value);
+            } else {
+                char* floatEnd;
+                value = strtof(newValue_, &floatEnd);
+            }
         }
     }
 
     void RuntimeSetting::item(const char* name, StringRange& value, int minLength, int maxLength) {
-        if (is(name) && this->value() != nullptr) {
-            value = this->value();
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%s\r\n", setting_, value.str().c_str());
+            } else {
+                value = StringRange(newValue_);
+            }
+        }
+    }
+
+    void RuntimeSetting::item(const char* name, int& value, EnumItem* e) {
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                for (; e->name; ++e) {
+                    if (e->value == value) {
+                        grbl_sendf(out_->client(), "$%s=%s\r\n", setting_, e->name);
+                        return;
+                    }
+                }
+            } else {
+                for (; e->name; ++e) {
+                    if (!strcmp(newValue_, e->name)) {
+                        value = e->value;
+                        return;
+                    }
+                }
+
+                if (strlen(newValue_) == 0) {
+                    value = e->value;
+                    return;
+                } else {
+                    Assert(false, "Provided enum value %s is not valid", newValue_);
+                }
+            }
+        }
+    }
+
+    void RuntimeSetting::item(const char* name, IPAddress& value) {
+        if (is(name)) {
+            isHandled_ = true;
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%s\r\n", setting_, value.toString().c_str());
+            } else {
+                IPAddress ip;
+                auto      str = String(newValue_);
+                if (!ip.fromString(str)) {
+                    Assert(false, "Expected an IP address like 192.168.0.100");
+                }
+                value = ip;
+            }
         }
     }
 
     void RuntimeSetting::item(const char* name, Pin& value) {
-        if (is(name) && this->value() != nullptr) {
-            auto parsed = Pin::create(StringRange(this->value()));
-            value.swap(parsed);
+        /*
+        Runtime settings of PIN objects is NOT supported!
+
+        if (is(name)) {
+            if (newValue_ == nullptr) {
+                grbl_sendf(out_->client(), "$%s=%s\r\n", setting_, value.name().c_str());
+            } else {
+                auto parsed = Pin::create(StringRange(this->value()));
+                value.swap(parsed);
+            }
         }
+        */
     }
 
     RuntimeSetting::~RuntimeSetting() {
diff --git a/Grbl_Esp32/src/Configuration/RuntimeSetting.h b/Grbl_Esp32/src/Configuration/RuntimeSetting.h
index 7bc4ce16..d3eac733 100644
--- a/Grbl_Esp32/src/Configuration/RuntimeSetting.h
+++ b/Grbl_Esp32/src/Configuration/RuntimeSetting.h
@@ -20,48 +20,46 @@
 
 #include "HandlerBase.h"
 #include "Configurable.h"
+#include "../WebUI/ESPResponse.h"
 
 namespace Configuration {
     class RuntimeSetting : public Configuration::HandlerBase {
     private:
-        const char* setting_;  // $foo/bar=12
+        const char* setting_;  // foo/bar
         const char* start_;
 
+        const char* newValue_; // null (read) or 123 (value)
+
+        WebUI::ESPResponseStream* out_;
+
         bool is(const char* name) const {
             if (start_ != nullptr) {
                 auto len = strlen(name);
-                return !strncmp(name, start_, len) && (start_[len] == '=' || start_[len] == '/');
+                auto result = !strncasecmp(name, start_, len) && (start_[len] == '\0' || start_[len] == '/');
+                return result;
             } else {
                 return false;
             }
         }
 
-        const char* value() const {
-            for (const char* it = start_; *it; ++it) {
-                if (*it == '/') {
-                    return nullptr;
-                } else if (*it == '=') {
-                    return it + 1;
-                }
-            }
-            return nullptr;
-        }
-
     protected:
         void enterSection(const char* name, Configuration::Configurable* value) override;
-
         bool matchesUninitialized(const char* name) override { return false; }
 
     public:
-        RuntimeSetting(const char* runtimeSetting);
+        RuntimeSetting(const char* key, const char* value, WebUI::ESPResponseStream* out);
 
+        void item(const char* name, bool& value) override;
         void item(const char* name, int32_t& value, int32_t minValue, int32_t maxValue) override;
         void item(const char* name, float& value, float minValue, float maxValue) override;
         void item(const char* name, StringRange& value, int minLength, int maxLength) override;
         void item(const char* name, Pin& value) override;
-        void item(const char* name, int& value, EnumItem* e) override {}
+        void item(const char* name, IPAddress& value) override;
+        void item(const char* name, int& value, EnumItem* e) override;
 
         HandlerType handlerType() override { return HandlerType::Runtime; }
+        
+        bool        isHandled_ = false;
 
         virtual ~RuntimeSetting();
     };
diff --git a/Grbl_Esp32/src/Error.h b/Grbl_Esp32/src/Error.h
index 733fd973..2c01cc07 100644
--- a/Grbl_Esp32/src/Error.h
+++ b/Grbl_Esp32/src/Error.h
@@ -86,6 +86,7 @@ enum class Error : uint8_t {
     AnotherInterfaceBusy        = 120,
     JogCancelled                = 130,
     BadPinSpecification         = 150,
+    BadRuntimeConfigSetting     = 151,
 };
 
 extern std::map<Error, const char*> ErrorNames;
diff --git a/Grbl_Esp32/src/ProcessSettings.cpp b/Grbl_Esp32/src/ProcessSettings.cpp
index e63133bd..00247e27 100644
--- a/Grbl_Esp32/src/ProcessSettings.cpp
+++ b/Grbl_Esp32/src/ProcessSettings.cpp
@@ -3,6 +3,10 @@
 #include "Regex.h"
 
 #include "MachineConfig.h"
+#include "Configuration/RuntimeSetting.h"
+#include "Configuration/AfterParse.h"
+#include "Configuration/Validator.h"
+#include "Configuration/ParseException.h"
 
 // WG Readable and writable as guest
 // WU Readable and writable as user and admin
@@ -546,7 +550,37 @@ Error do_command_or_setting(const char* key, char* value, WebUI::AuthenticationL
     // $key= with nothing following the = .  It is important to distinguish
     // those cases so that you can say "$N0=" to clear a startup line.
 
-    // First search the settings list by text name.  If found, set a new
+    // First search the yaml settings by name. If found, set a new
+    // value if one is given, otherwise display the current value
+    try {
+        Configuration::RuntimeSetting rts(key, value, out);
+        config->group(rts);
+
+        if (rts.isHandled_) {
+            try {
+                Configuration::Validator validator;
+                config->validate();
+                config->group(validator);
+            } catch (std::exception& ex) {
+                log_error("Validation error: " << ex.what());
+                return Error::BadRuntimeConfigSetting;
+            }
+
+            Configuration::AfterParse afterParseHandler;
+            config->afterParse();
+            config->group(afterParseHandler);
+
+            return Error::Ok;
+        }
+    } catch (const Configuration::ParseException& ex) {
+        log_error("Configuration parse error: " << ex.What() << " @ " << ex.LineNumber() << ":" << ex.ColumnNumber());
+        return Error::BadRuntimeConfigSetting;
+    } catch (const AssertionFailed& ex) {
+        log_error("Configuration change failed: " << ex.what());
+        return Error::BadRuntimeConfigSetting;
+    }
+
+    // Next search the settings list by text name. If found, set a new
     // value if one is given, otherwise display the current value
     for (Setting* s = Setting::List; s; s = s->next()) {
         if (strcasecmp(s->getName(), key) == 0) {