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+--- Thread: how to decode 4 byte access control (/showthread.php?tid=4376)
how to decode 4 byte access control - Hadeel - 14.11.2022
Hi!
I am trying to decode 4 byte access control value. In my project its group address is 13/3/9, data type is "15. 4byte access control".
The following image shows how the ETS group monitor decoded this value. like "11 11 11 40".
However, when I log the event.getvalue() in LM event script, as the second image shows the value does not make sense.
Is there a way to decode this value inside event script, like the ETS group monitor does ?
Thank you for your help in advance
RE: how to decode 4 byte access control - admin - 14.11.2022
Use this:
Code:
value = event.getvalue()
f0 = bit.band(bit.rshift(value, 28), 0x0F)
f1 = bit.band(bit.rshift(value, 24), 0x0F)
f2 = bit.band(bit.rshift(value, 20), 0x0F)
f3 = bit.band(bit.rshift(value, 16), 0x0F)
f4 = bit.band(bit.rshift(value, 12), 0x0F)
f5 = bit.band(bit.rshift(value, 8), 0x0F)
code = f0 .. f1 .. f2 .. f3 .. f4 .. f5
err = bit.band(value, 0x80) == 0x80
permission = bit.band(value, 0x40) == 0x40
direction = bit.band(value, 0x20) == 0x20
encryption = bit.band(value, 0x10) == 0x10
index = bit.band(value, 0x0F)
log(code, err, permission, direction, encryption, index)RE: how to decode 4 byte access control - Hadeel - 14.11.2022
Dear admin,
Thank you so much for your quick reply!
I just tried the code and it's working perfect
Much appreciated !