diff --git a/test-serial.rb b/test-serial.rb
index 5d6cc2a..59bf644 100644
--- a/test-serial.rb
+++ b/test-serial.rb
@@ -17,7 +17,7 @@ ActiveRecord::Base.establish_connection(connection_details)
 if __FILE__ == $0
 
   #params for serial port
-  port_str = "/dev/ttyUSB1"  #may be different for you
+  port_str = "/dev/ttyUSB0"  #may be different for you
   baud_rate = 9600
   data_bits = 7
   stop_bits = 1