improve README

diff --git a/README.md b/README.md
index 5827b31..9a3e5b9 100644 (file)
--- a/README.md
+++ b/README.md
@@ -13,4 +13,11 @@ trinketd [-d] [-p pidfile] [-P period] [-D datadir] [-i tics] [-l logfile]
 -l logfile  - name of log file, if absent will send 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 
+tics: 12          - number of samples 
+radlevel: 15.71   - radiation level, mkR/h
+
+
 Copyright (c) 2016, Teodor Sigaev <teodor@sigaev.ru>