add information about session timeouts to readme

diff --git a/README.txt b/README.txt
index a975bb5a31861bb25514ca0a0633281baf6b6227..d9a21e34600e03a3cdee4724e9b0a0c508fe5d7c 100644 (file)
--- a/README.txt
+++ b/README.txt
@@ -36,6 +36,12 @@ Linux notes:
  * Install required perl packages:
    apt-get install libwww-perl libxml-simple-perl libcrypt-ssleay-perl
 
+Session timeouts:
+ * Sessions on the RSBS2 card have a very long timeout of 600 minutes.
+   To change this timeout to (for example) 120 minutes, change the
+   SESSION_MANAGER_SESSION_TIMEOUT to 0x78:
+   $ ./rsbs2.pl -s SESSION_MANAGER_SESSION_TIMEOUT=0x78 name_of_board
+
 Pinout:
   +---------------+---------------+--------------------------------------+---+-
   |               | 2 4 6 8 A C E |                                      | 1 |