diff --git a/app/readme.txt b/app/readme.txt
index ca5a5c0..a1bc72d 100644
--- a/app/readme.txt
+++ b/app/readme.txt
@@ -8,15 +8,15 @@
 			bash ~/Downloads/Anaconda3-2019.03-Linux-x86_64.sh
 	. install kivy
 		(https://anaconda.org/conda-forge/kivy)
-		conda install -c conda-forge kivy
+		conda install -c conda-forge kivy==1.10.1
 	. install pcb-tools
-		
+
 		pip install pcb-tools
-		
+
 		if not installed cario, should install cario
-		
+
 		sudo apt-get install libcairo2-dev
-		#conda install -c conda-forge cairocffi 
+		#conda install -c conda-forge cairocffi
 		pip install cairocffi==0.6
 	. install tsp-solver
 		pip install tsp_solver
@@ -24,12 +24,11 @@
 		pip install opencv-contrib-python
 	. install printrun
 		- install dependencies
-			sudo apt install python3-serial python3-numpy cython3 python3-libxml2 python3-gi 
+			sudo apt install python3-serial python3-numpy cython3 python3-libxml2 python3-gi
 			python3-dbus python3-psutil python3-cairosvg libpython3-dev python3-appdirs python3-wxgtk4.0
-			
-			pip install pyserial 
-			git clone git clone https://github.com/kliment/Printrun.git
+
+			pip install pyserial
+		  git clone https://github.com/kliment/Printrun.git
 			copy the printrun subfolder inside the printrun repository to the app folder of opensolderingrobot
 	. install xclip xsel
 		- sudo apt-get install xclip xsel
-		
\ No newline at end of file
diff --git a/app/robotcontrol.py b/app/robotcontrol.py
index 88b6a66..c3cf8f7 100644
--- a/app/robotcontrol.py
+++ b/app/robotcontrol.py
@@ -139,3 +139,7 @@ def go_home(data):
 # convert gcode into an array of single commands
 def make_array(gcode):
     return gcode.splitlines()
+
+# strip off the command before sending to printer
+def strip_comment(gcode):
+    return gcode.split(';')[0]
diff --git a/app/test.py b/app/test.py
index 278552c..82546f3 100644
--- a/app/test.py
+++ b/app/test.py
@@ -194,6 +194,12 @@
 else:
 	print("nok home", gcode)
 
+gcode=robotcontrol.strip_comment("G28; this is a comment")
+if gcode=="G28":
+	print("ok strip")
+else:
+	print("nok strip",gcode)
+	
 # create g-code for soldering
 prjdata['Panel']=panel
 prjdata['SolderToolpath']=soldertoolpath