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Control DSC alarm with Envisalink interface
Author: Fredrik Johansson
Controlling DSC Powerseries and Honeywell alarm with Envisalink interface.
To connect to the device, add your Envisalink interface IP-address. The example uses the default "user" login command. If the login credentials are changed, login command needs to be tweaked. If the login credentials were changed, then the login value "user54" needs to be corrected. 54 is the checksum.
If you want to use the Disarm function then you need to change the 12348F part under Disarm command - text data. 1234 is the disarm code and 8F is the checksum.
The checksum is calculated from ASCII hex. Command 0 4 0 1 1 2 3 4 is 30 34 30 31 31 32 33 34 in ASCII hex. So 30+34+30+31+31+32+33+34=18F in hex. If the checksum is bigger then 1 byte, you only use the last byte. 18F = checksum 8F
More information about commands is to be fund in the Envisalink TPI manual.
http://forum.eyez-on.com/FORUM/download/file.php?id=223&sid=4634b565cb7000c8eb2cc64662096a4a
Supported alarm panels by the Envisalink interface: DSC PowerSeries (1555, 1555 MX, 1575, 5010 (832), 5020 (864), 1616, 1832, 1864) Honeywell Vista Panels (Vista20P, 21iP, 15P, 10P, 128P, and 250P)
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