In this work the advantages of a microcontroller were
used to establish a communication with the server PC.
The used communication is the serial communication RS-
232. Serial communication is the most common low-level
protocol for communicating between two or more devices
[9]. Texas Instruments MAX232 is used to make
adjustment between microcontroller’s TTL logic level
(5V÷0V) and logic level for RS232 standard
(-12V÷12V). An example of the conversion is shown in
Fig. 3.