to syslog if daemonize else stderr
Format of data file:
-total: 7220 - total number of Geiger event's (since power on)
-counts: 167 - number of Geiger event's for tics * period time
+total: 7220 - total number of Geiger's events (since power on)
+counts: 167 - number of Geiger's events for tics * period time
tics: 12 - number of samples
radlevel: 15.71 - radiation level, mkR/h