Added prel calculation for estimated total runtime

src/webserver.cpp

@@ -96,6 +96,9 @@ void WebServerHandler::webHandleConfig() {
 
   doc[PARAM_BATTERY] = reduceFloatPrecision(myBatteryVoltage.getVoltage());
 
+  FloatHistoryLog runLog(RUNTIME_FILENAME);
+  doc[PARAM_RUNTIME_AVERAGE] = reduceFloatPrecision(runLog.getAverage()?runLog.getAverage()/1000:0, 1);
+
 #if LOG_LEVEL == 6 && !defined(WEB_DISABLE_LOGGING)
   serializeJson(doc, Serial);
   Serial.print(CR);