diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 969bf7d5..d68b55fd 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -808,6 +808,7 @@ struct st_configitems config_list[] = {
   {"sondehub.callsign", 63, &sonde.config.sondehub.callsign},
   {"sondehub.antenna", 63, &sonde.config.sondehub.antenna},
   {"sondehub.email", 63, &sonde.config.sondehub.email},
+  {"sondehub.maxage", 0, &sonde.config.sondehub.maxage},
   {"sondehub.fiactive", 0, &sonde.config.sondehub.fiactive},
   {"sondehub.fiinterval", 0, &sonde.config.sondehub.fiinterval},
   {"sondehub.fimaxdist", 0, &sonde.config.sondehub.fimaxdist},
diff --git a/RX_FSK/data/cfg.js b/RX_FSK/data/cfg.js
index 2738037d..0fe80c78 100644
--- a/RX_FSK/data/cfg.js
+++ b/RX_FSK/data/cfg.js
@@ -70,6 +70,7 @@ var cfgs = [
 [ "sondehub.callsign", "Callsign"],
 [ "sondehub.antenna", "Antenna (optional, visisble on SondeHub tracker)"],
 [ "sondehub.email", "SondeHub email (optional, only used to contact in case of upload errors)"],
+[ "sondehub.maxage", "SondeHub max age of packets before submitting (seconds, ≥ 15)"],
 [ "", "SondeHub frequency import", "https://github.com/dl9rdz/rdz_ttgo_sonde/wiki/SondeHub-import" ],
 [ "sondehub.fiactive", "SondeHub frequency import active (0=disabled, 1=active)" ],
 [ "sondehub.fiinterval", "Import frequency (minutes, ≥ 5)" ],
diff --git a/RX_FSK/data/config.txt b/RX_FSK/data/config.txt
index 5e10b8d7..1ed7a1f3 100644
--- a/RX_FSK/data/config.txt
+++ b/RX_FSK/data/config.txt
@@ -139,6 +139,7 @@ sondehub.host=api.v2.sondehub.org
 sondehub.callsign=CHANGEME_RDZTTGO
 sondehub.antenna=
 sondehub.email=
+sondehub.maxage=15
 #-------------------------------#
 # Sondehub freq import settings
 #-------------------------------#
diff --git a/RX_FSK/src/Sonde.cpp b/RX_FSK/src/Sonde.cpp
index 978f47d8..cfbdb3fe 100644
--- a/RX_FSK/src/Sonde.cpp
+++ b/RX_FSK/src/Sonde.cpp
@@ -350,6 +350,7 @@ extern const int N_CONFIG;
 
 void Sonde::checkConfig() {
 	if(config.maxsonde > MAXSONDE) config.maxsonde = MAXSONDE;
+	if(config.sondehub.maxage<15) config.sondehub.maxage = 15;
 	if(config.sondehub.fiinterval<5) config.sondehub.fiinterval = 5;
 	if(config.sondehub.fimaxdist>700) config.sondehub.fimaxdist = 700;
 	if(config.sondehub.fimaxage>48) config.sondehub.fimaxage = 48;
diff --git a/RX_FSK/src/Sonde.h b/RX_FSK/src/Sonde.h
index a38c7c1d..edd875a7 100644
--- a/RX_FSK/src/Sonde.h
+++ b/RX_FSK/src/Sonde.h
@@ -236,6 +236,7 @@ struct st_sondehub {
 	char callsign[64];
 	char antenna[64];
 	char email[64];
+	int maxage;
         int fiactive;
 	int fiinterval;
 	int fimaxdist;
diff --git a/RX_FSK/src/conn-sondehub.cpp b/RX_FSK/src/conn-sondehub.cpp
index e54d9bbd..597457b5 100644
--- a/RX_FSK/src/conn-sondehub.cpp
+++ b/RX_FSK/src/conn-sondehub.cpp
@@ -516,9 +516,6 @@ void ConnSondehub::sondehub_send_data(SondeInfo * s) {
     return;
   }
 
-  // max age of data in JSON request (in seconds)
-#define SONDEHUB_MAXAGE 15
-
   char rs_msg[MSG_SIZE];
   char *w;
   struct tm ts;
@@ -692,7 +689,7 @@ void ConnSondehub::sondehub_send_data(SondeInfo * s) {
   } else {
     sondehub_send_next(s, rs_msg, strlen(rs_msg), 0);
   }
-  if (now - shStart > SONDEHUB_MAXAGE) { // after MAXAGE seconds
+  if (now - shStart > sonde.config.sondehub.maxage) { // after MAXAGE seconds
     sondehub_send_last();
     shclient_state = SH_CONN_WAITACK;
     rs_msg_len = 0;   // wait for new msg: 
@@ -705,7 +702,7 @@ void ConnSondehub::sondehub_finish_data() {
   if (shclient_state == SH_CONN_APPENDING) {
     time_t now;
     time(&now);
-    if (now - shStart > SONDEHUB_MAXAGE + 3) { // after MAXAGE seconds
+    if (now - shStart > sonde.config.sondehub.maxage + 3) { // after MAXAGE seconds
       sondehub_send_last();
       shclient_state = SH_CONN_WAITACK;
     rs_msg_len = 0;   // wait for new msg: