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Ajax Alarm system integration UART
#1
Hi,
do you know if it is possible to integrate LM5 with Ajax Alarm system by using their uartBridge module?
Im not familiar with uart protocol but what I understand that it uses rs232

Here is link to uartBridge protocol documentation: https://support.ajax.systems/ajax-conten...dge_en.pdf

I dont have Ajax yet but I want to know if it is possible to integrate ( at least in theory)
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#2
Hi
The protocol description is missing there (or I can't see it). There's no CRC, which is dangerous (or maybe it's in layer below but it's not visible from the provided PDF).

I see +5V at the pinout. Does it mean it's TTL RS232? I'm just guessing)
LM5Lp, firmware: 2018.08.22, FlashSYS v2, ARMv7 Processor rev 5 (v7l), kernel 4.4.151





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#3
It's not possible to connect this directly to LM. You will need a USB-UART adapter. The protocol itself looks simple enough - ASCII lines terminated by \r\n
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#4
Ok and thanks! Now I know that it can be done. It is only matter of scripting that functionally.
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