diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 0df29b1..eb495dc 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -2525,7 +2525,7 @@ void enableNetwork(bool enable) {
     SetupAsyncServer();
     udp.begin(WiFi.localIP(), LOCALUDPPORT);
     MDNS.addService("http", "tcp", 80);
-    MDNS.addService("kisstnc", "tcp", 14580);
+    MDNS.addService("kiss-tnc", "tcp", 14580);
     MDNS.addService("jsonrdz", "tcp", 14570);
     if (sonde.config.kisstnc.active) {
       tncserver.begin();
diff --git a/RX_FSK/version.h b/RX_FSK/version.h
index 40532b1..2aef016 100644
--- a/RX_FSK/version.h
+++ b/RX_FSK/version.h
@@ -1,4 +1,4 @@
 const char *version_name = "rdzTTGOsonde";
-const char *version_id = "devel20210815";
+const char *version_id = "devel20210817";
 const int SPIFFS_MAJOR=2;
 const int SPIFFS_MINOR=14;
diff --git a/libraries/SondeLib/aprs.cpp b/libraries/SondeLib/aprs.cpp
index 227c80a..0f710b6 100644
--- a/libraries/SondeLib/aprs.cpp
+++ b/libraries/SondeLib/aprs.cpp
@@ -215,6 +215,7 @@ extern int aprsstr_mon2kiss(const char *mon, char raw[], int raw_len)
 	if(len==0) return 0;
 	int idx=0;
 	raw[idx++] = '\xC0';
+	raw[idx++] = 0; // channel 0
 	for(int i=0; i<len-2; i++) { // -2: discard CRC, not used in KISS
 		if(tmp[i]=='\xC0') {	
 			raw[idx++] = '\xDB';
@@ -291,7 +292,7 @@ char *aprs_senddata(SondeInfo *s, const char *usercall, const char *sym) {
 	// time
 	int i = strlen(b);
 	int sec = s->time % 86400;
-	snprintf(b+i, APRS_MAXLEN-1, "%02d%02d%02dz", sec/(60*60), (sec%(60*60))/60, sec%60);
+	snprintf(b+i, APRS_MAXLEN-1, "%02d%02d%02dh", sec/(60*60), (sec%(60*60))/60, sec%60);
 	i = strlen(b);
 	//aprsstr_append_data(time, ds);
 	int lati = abs((int)s->lat);