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There are no communication instructions and examples in the access control system. The protocol documents are not very clear.
2018-01-02 10:59
Details of the problem:

Hello, there are no communication instructions and examples in the access control system. The protocol documents are not very clear.

Expert answer:

An example about a PC sent to a control panel (read controller SN) :

7E30303030303030303030303030303030FFFFFFFF19883D90010200000000006D7E

Split interpretation:

7E--commad header

30303030303030303030303030303030 --The ascii code of SN (not important when reading SN, other instructions need to be entered correctly)

FFFFFFFF -- The communication default password is FFFFFFFF

19883D90 -- information code ( a random number or a sequence number)

010200 -- the control code for the corresponding instruction (with the command table below)

00000000-- The length of data, no data package is all 0.

6D -- Check sum

30303030303030303030303030303030FFFFFFFF19883D9001020000000000 Sum check    take the low byte

7E -- Command tail

Sample of control board sent to PC (read controller SN response) :


7E1906677946432D38393230413235303530323835FFFFFFFF3102000000001046432D38393230413235303530323835087E

Split interpretation:

7E--commad header

19066779 - The software sends out a network signal, and the software responds to anything.

46432D38393230413235303530323835- The sn and ascii code of the controller itself

FFFFFFFF -- Communication password

310200 -- Command response code (check list)

00000010 --Several parts length of the data packet 

46432D38393230413235303530323835---Parts of content of the data packet (this is the sn directive, so the most of packets are the ASCII code of sn)

08 -- Sum check

7E -- Command tail

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