diff --git a/examples/BresserWeatherSensorMQTTWifiMgr/BresserWeatherSensorMQTTWifiMgr.ino b/examples/BresserWeatherSensorMQTTWifiMgr/BresserWeatherSensorMQTTWifiMgr.ino
index f7be5eb0..7ed787ec 100644
--- a/examples/BresserWeatherSensorMQTTWifiMgr/BresserWeatherSensorMQTTWifiMgr.ino
+++ b/examples/BresserWeatherSensorMQTTWifiMgr/BresserWeatherSensorMQTTWifiMgr.ino
@@ -72,6 +72,7 @@
 // 20230619 Created from BresserWeatherSensorMQTT
 // 20230709 Added lightning sensor
 // 20230708 Changed MQTT payload and topic from char[] to String
+// 20230710 Added optional JSON output of floating point values as strings
 //
 // ToDo:
 //
@@ -126,6 +127,16 @@
 // RTC Memory Address for the DoubleResetDetector to use
 #define DRD_ADDRESS 0
 
+// See
+// https://stackoverflow.com/questions/19554972/json-standard-floating-point-numbers
+// and
+// https://stackoverflow.com/questions/35709595/why-would-you-use-a-string-in-json-to-represent-a-decimal-number
+//
+// Summary:
+// A string representation of a float (e.g. "temp_c":"21.5") is recommended if the value shall displayed with the specified number of decimals.
+// Otherwise the float value can be output as a numerical value (e.g. "temp_c":21.5).
+//
+//#define JSON_FLOAT_AS_STRING
 
 
 // Enable to debug MQTT connection; will generate synthetic sensor data.
@@ -166,6 +177,12 @@
 #include "WeatherUtils.h"
 #include "RainGauge.h"
 
+#if defined(JSON_FLOAT_AS_STRING)
+    #define JSON_FLOAT(x) String("\"") + x + String("\"")
+#else
+    #define JSON_FLOAT(x) x
+#endif
+
 const char sketch_id[] = "BresserWeatherSensorMQTTWifiMgr";
 
 // Map sensor IDs to Names
@@ -595,7 +612,7 @@ void publishWeatherdata(bool complete)
       }
 
       // Example:
-      // {"ch":0,"battery_ok":1,"humidity":44,"wind_gust":"1.2","wind_avg":"1.2","wind_dir":150,"rain":146}
+      // {"ch":0,"battery_ok":1,"humidity":44,"wind_gust":1.2,"wind_avg":1.2,"wind_dir":150,"rain":146}
       mqtt_payload  = "{";
       mqtt_payload2 = "{";
       mqtt_payload  += String("\"id\":") + String(weatherSensor.sensor[i].sensor_id);
@@ -604,15 +621,15 @@ void publishWeatherdata(bool complete)
       #endif
       mqtt_payload += String(",\"battery_ok\":") + (weatherSensor.sensor[i].battery_ok ? String("1") : String("0"));
       if (weatherSensor.sensor[i].temp_ok || complete) {
-          mqtt_payload += String(",\"temp_c\":") + String(weatherSensor.sensor[i].temp_c, 1);
+          mqtt_payload += String(",\"temp_c\":") + JSON_FLOAT(String(weatherSensor.sensor[i].temp_c, 1));
       }
       if (weatherSensor.sensor[i].humidity_ok || complete) {
           mqtt_payload += String(",\"humidity\":") + String(weatherSensor.sensor[i].humidity);
       }
       if (weatherSensor.sensor[i].wind_ok || complete) {
-          mqtt_payload += String(",\"wind_gust\":") + String(weatherSensor.sensor[i].wind_gust_meter_sec, 1);
-          mqtt_payload += String(",\"wind_avg\":")  + String(weatherSensor.sensor[i].wind_avg_meter_sec, 1);
-          mqtt_payload += String(",\"wind_dir\":")  + String(weatherSensor.sensor[i].wind_direction_deg, 1);
+          mqtt_payload += String(",\"wind_gust\":") + JSON_FLOAT(String(weatherSensor.sensor[i].wind_gust_meter_sec, 1));
+          mqtt_payload += String(",\"wind_avg\":")  + JSON_FLOAT(String(weatherSensor.sensor[i].wind_avg_meter_sec, 1));
+          mqtt_payload += String(",\"wind_dir\":")  + JSON_FLOAT(String(weatherSensor.sensor[i].wind_direction_deg, 1));
       }
       if (weatherSensor.sensor[i].wind_ok) {
           char buf[4];
@@ -621,24 +638,25 @@ void publishWeatherdata(bool complete)
           mqtt_payload2 += String(",\"wind_avg_bft\":")  + String(windspeed_ms_to_bft(weatherSensor.sensor[i].wind_avg_meter_sec));
       }
       if ((weatherSensor.sensor[i].temp_ok) && (weatherSensor.sensor[i].humidity_ok)) {
-        mqtt_payload2 += String(",\"dewpoint_c\":") + String(calcdewpoint(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].humidity), 1);
+        mqtt_payload2 += String(",\"dewpoint_c\":")
+            + JSON_FLOAT(String(calcdewpoint(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].humidity), 1));
 
         if (weatherSensor.sensor[i].wind_ok) {
           mqtt_payload2 += String(",\"perceived_temp_c\":") 
-              + String(perceived_temperature(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].wind_avg_meter_sec, weatherSensor.sensor[i].humidity), 1);
+              + JSON_FLOAT(String(perceived_temperature(weatherSensor.sensor[i].temp_c, weatherSensor.sensor[i].wind_avg_meter_sec, weatherSensor.sensor[i].humidity), 1));
         }
       }
       if (weatherSensor.sensor[i].uv_ok || complete) {
-          mqtt_payload += String(",\"uv\":") + String(weatherSensor.sensor[i].uv, 1);
+          mqtt_payload += String(",\"uv\":") + JSON_FLOAT(String(weatherSensor.sensor[i].uv, 1);
       }
       if (weatherSensor.sensor[i].light_ok || complete) {
-          mqtt_payload += String(",\"light_klx\":") + String(weatherSensor.sensor[i].light_klx, 1);
+          mqtt_payload += String(",\"light_klx\":") + JSON_FLOAT(String(weatherSensor.sensor[i].light_klx, 1));
       }
       if (weatherSensor.sensor[i].rain_ok || complete) {
-          mqtt_payload += String(",\"rain\":")  + String(weatherSensor.sensor[i].rain_mm, 1);
-          mqtt_payload += String(",\"rain_d\":") + String(rainGauge.currentDay(), 1);
-          mqtt_payload += String(",\"rain_w\":") + String(rainGauge.currentWeek(), 1);
-          mqtt_payload += String(",\"rain_m\":") + String(rainGauge.currentMonth(), 1);
+          mqtt_payload += String(",\"rain\":")   + JSON_FLOAT(String(weatherSensor.sensor[i].rain_mm, 1));
+          mqtt_payload += String(",\"rain_d\":") + JSON_FLOAT(String(rainGauge.currentDay(), 1));
+          mqtt_payload += String(",\"rain_w\":") + JSON_FLOAT(String(rainGauge.currentWeek(), 1));
+          mqtt_payload += String(",\"rain_m\":") + JSON_FLOAT(String(rainGauge.currentMonth(), 1));
       }
       if (weatherSensor.sensor[i].moisture_ok || complete) {
           mqtt_payload += String(",\"moisture\":") + String(weatherSensor.sensor[i].moisture);