diff --git a/src/specificClass.js b/src/specificClass.js
index 999443c..2409c4b 100644
--- a/src/specificClass.js
+++ b/src/specificClass.js
@@ -199,6 +199,11 @@ _callMeasurementHandler(measurementType, value, position, context) {
 
   async handleInput(source, action, parameter) {
 
+    //sanitize input
+    if( typeof action !== 'string'){this.logger.error(`Action must be string`); return;}
+    //convert to lower case to avoid to many mistakes in commands
+    action = action.toLowerCase();
+
     if (!this.isValidSourceForMode(source, this.currentMode)) {
       let warningTxt = `Source '${source}' is not valid for mode '${this.currentMode}'.`;
       this.logger.warn(warningTxt);
@@ -209,23 +214,24 @@ _callMeasurementHandler(measurementType, value, position, context) {
     
     try {
       switch (action) {
-        case "execSequence":
+
+        case "execsequence":
           return await this.executeSequence(parameter);
 
-        case "execMovement":
+        case "execmovement":
           return await this.setpoint(parameter);
 
-        case "flowMovement":
+        case "flowmovement":
           // Calculate the control value for a desired flow
           const pos = this.calcCtrl(parameter);
           // Move to the desired setpoint
           return await this.setpoint(pos);
 
-        case "emergencyStop":
+        case "emergencystop":
           this.logger.warn(`Emergency stop activated by '${source}'.`);
           return await this.executeSequence("emergencyStop");
 
-        case "statusCheck":
+        case "statuscheck":
           this.logger.info(`Status Check: Mode = '${this.currentMode}', Source = '${source}'.`);
           break;
 
@@ -704,23 +710,12 @@ _callMeasurementHandler(measurementType, value, position, context) {
 
     // Improved output object generation
     const output = {};
-    //build the output object
-    this.measurements.getTypes().forEach(type => {
-      this.measurements.getVariants(type).forEach(variant => {
 
-        const downstreamVal = this.measurements.type(type).variant(variant).position("downstream").getCurrentValue();
-        const upstreamVal = this.measurements.type(type).variant(variant).position("upstream").getCurrentValue();
-
-        if (downstreamVal != null) {
-          output[`downstream_${variant}_${type}`] = downstreamVal;
-        }
-        if (upstreamVal != null) {
-          output[`upstream_${variant}_${type}`] = upstreamVal;
-        }
-        if (downstreamVal != null && upstreamVal != null) {
-          const diffVal = this.measurements.type(type).variant(variant).difference().value;
-          output[`differential_${variant}_${type}`] = diffVal;
-        }
+    Object.entries(this.measurements.measurements).forEach(([type, variants]) => {
+      Object.entries(variants).forEach(([variant, positions]) => {
+        Object.entries(positions).forEach(([position, measurement]) => {
+          output[`${type}.${variant}.${position}`] = measurement.getCurrentValue();
+        });
       });
     });
 
@@ -733,6 +728,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     output["cog"] = this.cog; // flow / power efficiency
     output["NCog"] = this.NCog; // normalized cog
     output["NCogPercent"] = Math.round(this.NCog * 100 * 100) / 100 ;
+    output["maintenanceTime"] = this.state.getMaintenanceTimeHours();
 
     if(this.flowDrift != null){
       const flowDrift = this.flowDrift;