Testing the communication

Readme.md

@@ -62,14 +62,27 @@ The Arduino Sketch (TCLab sketch) is a set of methods that supports the Temperat
 
 4. Test
 
-To confirm the board's proper operation, use the serial monitor (located under the tools menu of the Arduino IDE). Select serial monitor, set the baud rate to 9600, and line endings to 'newline.' If the firmware is operating correctly, enter the command
+To confirm the board's proper operation, use the serial monitor (located under the tools menu of the Arduino IDE). Select serial monitor, set the baud rate to `115200`, and line endings to 'newline.' If the firmware is operating correctly, enter the command
 ```
 LED 100
 ```
 
-will cause the LED to flash at 100% power for 10 seconds.
+this will cause the LED to flash at 100% power for 10 seconds.
 
+**Note: if the serial monitor does not answer you when you type a command, double-check the setting in the serial monitor and consider that serial commands are case-sensitive.**
 
+You can also try the command `SCAN`:
+
+```
+SCAN
+
+19.190
+20.995
+0.000
+0.000
+```
+
+`SCAN`  get values T1 T2 Q1 Q1 in line delimited values
 
 ## TCLab library