diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 679d6fa..532ff68 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -417,13 +417,13 @@ const char *createSondeHubMap() {
   HTMLBODY(ptr, "map.html");
   if (!sonde.config.sondehub.active) {
     strcat(ptr, "<div>NOTE: SondeHub uploading is not enabled, detected sonde will not be visable on map</div>");
-    if ((*s->ser == 0) && (strcmp(sonde.config.sondehub.lat,"null"))) {
+    if ((*s->ser == 0) && (sonde.config.sondehub.lat[0] != '\0')) {
       sprintf(ptr + strlen(ptr), "<iframe src=\"https://sondehub.org/#!mc=%s,%s&mz=8\" style=\"border:1px solid #00A3D3;border-radius:20px;height:95vh\"></iframe>", sonde.config.sondehub.lat, sonde.config.sondehub.lon);
     } else {
       sprintf(ptr + strlen(ptr), "<iframe src=\"https://sondehub.org/%s\" style=\"border:1px solid #00A3D3;border-radius:20px;height:95vh\"></iframe>", s-> ser);
     }
   } else {
-    if ((*s->ser == 0) && (strcmp(sonde.config.sondehub.lat,"null"))) {
+    if ((*s->ser == 0) && (sonde.config.sondehub.lat[0] != '\0')) {
       sprintf(ptr, "<iframe src=\"https://sondehub.org/#!mc=%s,%s&mz=8\" style=\"border:1px solid #00A3D3;border-radius:20px;height:98vh;width:100%%\"></iframe>", sonde.config.sondehub.lat, sonde.config.sondehub.lon);
     } else {
       sprintf(ptr, "<iframe src=\"https://sondehub.org/%s\" style=\"border:1px solid #00A3D3;border-radius:20px;height:98vh;width:100%%\"></iframe>", s-> ser);
@@ -3046,16 +3046,24 @@ void sondehub_station_update(WiFiClient *client, struct st_sondehub *conf) {
           "\"uploader_contact_email\": \"%s\",",
           version_name, version_id, conf->callsign, conf->email);
   w += strlen(w);
-  if (conf->chase == 0) {
-    sprintf(w,
-            "\"uploader_position\": [%s,%s,%s],"
-            "\"uploader_antenna\": \"%s\""
-            "}",
-            conf->lat, conf->lon, conf->alt, conf->antenna);
+  if ((conf->chase == 0) && (conf->lat[0] != '\0') && (conf->lon[0] != '\0')){
+    if (conf->alt[0] != '\0') {
+      sprintf(w,
+              "\"uploader_position\": [%s,%s,%s],"
+              "\"uploader_antenna\": \"%s\""
+              "}",
+              conf->lat, conf->lon, conf->alt, conf->antenna);
+    } else {
+      sprintf(w,
+              "\"uploader_position\": [%s,%s,null],"
+              "\"uploader_antenna\": \"%s\""
+              "}",
+              conf->lat, conf->lon, conf->antenna);
+    }
   }
   else if (gpsPos.valid && gpsPos.lat != 0 && gpsPos.lon != 0) {
     sprintf(w,
-            "\"uploader_position\": [%.6f, %.6f, %d],"
+            "\"uploader_position\": [%.6f,%.6f,%d],"
             "\"uploader_antenna\": \"%s\","
             "\"mobile\": \"true\""
             "}",
@@ -3235,17 +3243,26 @@ void sondehub_send_data(WiFiClient *client, SondeInfo *s, struct st_sondehub *co
     w += strlen(w);
   }
 
-  if (conf->chase == 0) {
-    sprintf(w,
-            "\"uploader_position\": [ %s, %s, %s ],"
-            "\"uploader_antenna\": \"%s\""
-            "}]",
-            conf->lat, conf->lon, conf->alt, conf->antenna
-          );
+  if ((conf->chase == 0) && (conf->lat[0] != '\0') && (conf->lon[0] != '\0')){
+    if (conf->alt[0] != '\0') {
+      sprintf(w,
+              "\"uploader_position\": [%s,%s,%s],"
+              "\"uploader_antenna\": \"%s\""
+              "}]",
+              conf->lat, conf->lon, conf->alt, conf->antenna
+            );
+    } else {
+      sprintf(w,
+              "\"uploader_position\": [%s,%s,null],"
+              "\"uploader_antenna\": \"%s\""
+              "}]",
+              conf->lat, conf->lon, conf->antenna
+            );
+    }
   }
   else if (gpsPos.valid && gpsPos.lat != 0 && gpsPos.lon != 0) {
     sprintf(w,
-            "\"uploader_position\": [ %.6f, %.6f, %d ],"
+            "\"uploader_position\": [%.6f,%.6f,%d],"
             "\"uploader_antenna\": \"%s\""
             "}]",
             gpsPos.lat, gpsPos.lon, gpsPos.alt, conf->antenna
diff --git a/RX_FSK/data/config.txt b/RX_FSK/data/config.txt
index c3c518d..4e6e86c 100644
--- a/RX_FSK/data/config.txt
+++ b/RX_FSK/data/config.txt
@@ -126,9 +126,9 @@ sondehub.active=0
 sondehub.chase=0
 sondehub.host=api.v2.sondehub.org
 sondehub.callsign=CHANGEME_RDZTTGO
-sondehub.lat=null
-sondehub.lon=null
-sondehub.alt=null
+sondehub.lat=
+sondehub.lon=
+sondehub.alt=
 sondehub.antenna=
 sondehub.email=
 #-------------------------------#