Newland NLS-HR11 User Manual page 33

Example:
Write 0x51, 0x52, 0x53, 0x54 into 4 contiguous addresses starting from address 0x0000.
1) Write operation succeeds:
Command sent:
Message received: 0x02 0x00 0x00 0x01 0x00 0x33 0x31
2) Incorrect FCS:
Command sent:
Message received: 0x02 0x00 0x01 0x01 0x00 0x04 0x01
23
0x7e 0x00 0x04 0x04 0x00 0x00
0x7e 0x00 0x04 0x03 0x00 0x00
0x51 0x52 0x53 0x54 0xbc 0x17
0x51 0x52 0x53 0x54 0x33 0x34
** Enter Setup
Exit Setup