diff --git a/paramod.yaml b/paramod.yaml
index 4708c23..abb8886 100644
--- a/paramod.yaml
+++ b/paramod.yaml
@@ -8,6 +8,7 @@ mqtt:
   password: 97sm3pHNSMZ4M5qUj0x8
   path: heizung/paradigma
   leitsystem_path: heizung/leitsystem2
+  set_write_interval_ms: 2000
 influxdb:
   bucket: Paradigma
   org: skaville
diff --git a/src/main.rs b/src/main.rs
index ca26ed5..059e076 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -127,18 +127,10 @@ async fn settings_page(data: web::Data<AppState>) -> Result<HttpResponse> {
 
 
 
-#[derive(Serialize, Deserialize, Clone)]
-#[serde(untagged)]
-enum SaveTableRows {
-    InputRegister(Vec<HashMap<String, ModbusInputRegisterConfig>>),
-    HoldingRegister(Vec<HashMap<String, ModbusHoldingRegisterConfig>>),
-    Coils(Vec<HashMap<String, ModbusCoilsConfig>>),
-}
-
 #[derive(Serialize, Deserialize)]
 struct SaveTableRequest {
     table_id: String,
-    rows: SaveTableRows,
+    rows: serde_json::Value,
 }
 
 async fn save_table(
@@ -149,25 +141,28 @@ async fn save_table(
     let conf_path = "paramod.yaml";
     match req.table_id.as_str() {
         "modbus_input_register" => {
-            if let SaveTableRows::InputRegister(rows) = req.rows.clone() {
-                config.modbus_input_register = Some(rows);
-            } else {
-                return Ok(HttpResponse::BadRequest().body("Falscher Typ für input_register"));
-            }
+            let rows: Vec<HashMap<String, ModbusInputRegisterConfig>> =
+                match serde_json::from_value(req.rows.clone()) {
+                    Ok(v) => v,
+                    Err(e) => return Ok(HttpResponse::BadRequest().body(format!("Falscher Typ für input_register: {}", e))),
+                };
+            config.modbus_input_register = Some(rows);
         }
         "modbus_holding_register" => {
-            if let SaveTableRows::HoldingRegister(rows) = req.rows.clone() {
-                config.modbus_holding_register = Some(rows);
-            } else {
-                return Ok(HttpResponse::BadRequest().body("Falscher Typ für holding_register"));
-            }
+            let rows: Vec<HashMap<String, ModbusHoldingRegisterConfig>> =
+                match serde_json::from_value(req.rows.clone()) {
+                    Ok(v) => v,
+                    Err(e) => return Ok(HttpResponse::BadRequest().body(format!("Falscher Typ für holding_register: {}", e))),
+                };
+            config.modbus_holding_register = Some(rows);
         }
         "modbus_coils" => {
-            if let SaveTableRows::Coils(rows) = req.rows.clone() {
-                config.modbus_coils = Some(rows);
-            } else {
-                return Ok(HttpResponse::BadRequest().body("Falscher Typ für coils"));
-            }
+            let rows: Vec<HashMap<String, ModbusCoilsConfig>> =
+                match serde_json::from_value(req.rows.clone()) {
+                    Ok(v) => v,
+                    Err(e) => return Ok(HttpResponse::BadRequest().body(format!("Falscher Typ für coils: {}", e))),
+                };
+            config.modbus_coils = Some(rows);
         }
         _ => return Ok(HttpResponse::BadRequest().body("Invalid table_id")),
     }
diff --git a/static/script.js b/static/script.js
index efc39bd..e944c07 100644
--- a/static/script.js
+++ b/static/script.js
@@ -56,7 +56,7 @@ function addRow() {
                 <button class="delete-btn" onclick="deleteRow(this)">🗑️</button>
             </td>
         `;
-    } else if (typeof tableId !== 'undefined' && tableId === 'modbus_holding_registers') {
+    } else if (typeof tableId !== 'undefined' && tableId === 'modbus_holding_register') {
         newRow.innerHTML = `
             <td><input type='text' class='text-input' data-field='bezeichnung' value='' /></td>
             <td><input type='text' class='text-input' data-field='adresse' value='' /></td>
@@ -147,14 +147,14 @@ async function saveTable() {
                 influxdb: influxdb,
                 comment: comment
             };
-        } else if (typeof tableId !== 'undefined' && tableId === 'modbus_holding_registers') {
+        } else if (typeof tableId !== 'undefined' && tableId === 'modbus_holding_register') {
             const write = row.querySelector("input[data-field='write']")?.checked || false;
-            const rtype = row.querySelector("input[data-field='type']")?.value || null;
+            const type = row.querySelector("input[data-field='type']")?.value || null;
             const factor = parseFloat(row.querySelector("input[data-field='factor']")?.value || row.querySelector("input[data-field='faktor']")?.value || '1.0');
             const comment = row.querySelector("input[data-field='comment']")?.value || null;
             value = {
                 addr: addr,
-                rtype: rtype,
+                type: type,
                 factor: factor,
                 write: write,
                 mqtt: mqtt,
@@ -162,12 +162,12 @@ async function saveTable() {
                 comment: comment
             };
         } else {
-            const rtype = row.querySelector("input[data-field='type']")?.value || null;
+            const type = row.querySelector("input[data-field='type']")?.value || null;
             const factor = parseFloat(row.querySelector("input[data-field='factor']")?.value || row.querySelector("input[data-field='faktor']")?.value || '1.0');
             const comment = row.querySelector("input[data-field='comment']")?.value || null;
             value = {
                 addr: addr,
-                rtype: rtype,
+                type: type,
                 factor: factor,
                 mqtt: mqtt,
                 influxdb: influxdb,
@@ -196,8 +196,9 @@ async function saveTable() {
             messageDiv.className = 'message success';
             messageDiv.textContent = '✓ Erfolgreich gespeichert!';
         } else {
+            const errorText = (await response.text()) || 'Unbekannter Fehler';
             messageDiv.className = 'message error';
-            messageDiv.textContent = '✗ Fehler beim Speichern!';
+            messageDiv.textContent = `✗ Fehler beim Speichern: ${errorText}`;
         }
         
         setTimeout(() => {