From f86bda356616a9d4de35d6a7cd9b76480fb88ea6 Mon Sep 17 00:00:00 2001
From: Markus Rosenstihl <markus.rosenstihl@physik.tu-darmstadt.de>
Date: Thu, 18 Feb 2016 19:53:57 +0000
Subject: [PATCH] flow_control: configuration documentation

---
 src/tools/flow_control.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/tools/flow_control.py b/src/tools/flow_control.py
index c011d6e..dc8ea91 100755
--- a/src/tools/flow_control.py
+++ b/src/tools/flow_control.py
@@ -193,6 +193,23 @@ if __name__ == "__main__":
     
     Several parameters are printed on every execution
 
+    The default serial device is /dev/ttyUSB0. If oyu wnat to change that create a 
+    file calle "~/.flow" with the first line containing an alternate path, i.e. /dev/ttyUSB1
+    
+    Sample output:
+    
+    user@pfg # flow
+    Device:                 GSCC9SA
+    Medium:                 N2B
+    Current Flow:           0.00
+    Current Set Flow:       0.00
+    Flow Unit:              ln/min
+    Total Gas:              0.00
+    Total Unit:             lnF
+    Current Temperature:   22.38 C
+    Alarm:                       0
+    HW Error:                    0
+
     """
     conf = os.path.expanduser('~/.flow')
     if os.path.exists(conf):