diff --git a/Code/thermal_printer/README.md b/Code/thermal_printer/README.md
index 3859146..77c601b 100644
--- a/Code/thermal_printer/README.md
+++ b/Code/thermal_printer/README.md
@@ -1,6 +1,8 @@
 # DevTerm Thermal printer 
 
+`echo -e “Hello DevTerm\n\n\n\n\n\n” > /tmp/DEVTERM_PRINTER_IN`
 
+`cat xxx.txt > /tmp/DEVTERM_PRINTER_IN`
 
 ### Eos/Pos commands example