Update README.md

Author: liyanboy74

README.md

@@ -3,3 +3,22 @@ An open API application for programming HCS301 EEPROM Code Hopping.
 
 
 ![HCS301 Programmer Software](https://user-images.githubusercontent.com/64005694/172905165-ddc48f12-c173-4eb3-8305-408ea8ab3ba6.jpg)
+
+## Description
+This software requires an interface hardware that can write information to the IC.The information is sent to the interface IC via the com port using a usb to serial converter.
+
+### Protocol
+`UART`,`8 Data`,`1 StopBit`,`No Parity`,`BaudRate 9600`
+
+### Transmit
+- Device identification  *(Optional)*
+- Information to be programmed
+
+
+#### Device identification
+Immediately after opening the port, the software sends the character `!` and if it does not receive a response, it does so up to three times.<br>
+response must send at below format:<br>
+`!` `DEVICE-NAME-(STRING)` `\n`
+
+### Receive
+