diff --git a/Guide-To-Setup-thermal-printer-from-source-code.md b/Guide-To-Setup-thermal-printer-from-source-code.md
index 351d522..fb4c7a6 100644
--- a/Guide-To-Setup-thermal-printer-from-source-code.md
+++ b/Guide-To-Setup-thermal-printer-from-source-code.md
@@ -4,13 +4,13 @@ We assume that you have a Devterm with stock os running
 and a little bit of Linux compiling experience   
 know how to install packages through package manager like apt    
 
-
-## CM3 or CM4 
+## WiringPi 
+### CM3 or CM4 
 ```
 sudo apt install -y wiringpi libwiringpi-dev libcups2-dev 
 ```
 
-## A06 A04
+### A06 A04
 ```
 git clone https://github.com/clockworkpi/DevTerm.git
 cd DevTerm/Code/devterm_wiringpi_cpi/
@@ -18,7 +18,7 @@ sudo ./build
 #chose 0 or 1 depend which board you have
 ```
 
-## R01
+### R01
 ```
 git clone https://github.com/clockworkpi/DevTerm.git
 wget https://github.com/WiringPi/WiringPi/archive/refs/tags/final_official_2.50.tar.gz
@@ -42,6 +42,8 @@ sudo systemctl start devterm-printer
 ## debug or run it from manually
 1. setup socat socket for data receving for thermal printer
 ```
+   sudo systemctl stop devterm-printer #stop service
+   sudo systemctl stop devterm-socat   #stop service
    sudo socat -d -d pty,link=/tmp/DEVTERM_PRINTER_OUT,raw,echo=0 pty,link=/tmp/DEVTERM_PRINTER_IN,raw,echo=0
    sudo ./usr/local/bin/devterm_socat.sh # <- this .sh file is in DevTerm/Code/thermal_printer/usr/local/bin/
 ```