diff --git a/Home.md b/Home.md
index 85dd23a..1719b04 100644
--- a/Home.md
+++ b/Home.md
@@ -1,5 +1,19 @@
 # Solving typical issues in DWM
 
-## Fixing misbehaving Java applications
-Try setting `export _JAVA_AWT_WM_NONREPARENTING=1`. Setting `wmname "LG3D"` using wmname may help too. This will requieres to install `wmname` using pacman.
+## Fixing misbehaving Java applications (Arduino IDE)
+
+Setting `export _JAVA_AWT_WM_NONREPARENTING=1`. Setting `wmname "LG3D"` using wmname may help too. 
+This will requieres to install `wmname` using pacman. 
+
+## How to fix Error Opening Serial Port dev ttyUSB0 
+
+```
+ls -l /dev/ttyUSB*
+crw-rw---- 1 root uucp 188, 0 Feb 24 23:47 /dev/ttyUSB0
+
+sudo chmod a+rw /dev/ttyUSB0
+
+ls  -l /dev/ttyUSB0
+crw-rw-rw- 1 root uucp 188, 0 Feb 24 23:47 /dev/ttyUSB0
+```