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+Requirements a webserver with activated PHP (apache, nginx or whatever) – PHP 7.x is ok
+
+
+Extension of hbmonitor  – we log if a call is ended (I think it’s better as start) Please check permissions for wr
+iting the logfile in target folder !
+
+
+Call this script with crontab for everyday use.
+
+Put this file in /etc/cron.daily/ and add attribute:
+
+chmod +x /etc/cron.daily/lastheard
+
+
+
+Call the website with http://YOUR_HOST/log.php it runs with a refresh/reload time of 30sec, change the script for 
+other timeset.
+
+
+
+Thank you, Heiko DL1BZ, who shared the lastheard code.