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Logic Machine Forum › LogicMachine eco-system › Gateway v
Ajax Alarm system integration UART

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Ajax Alarm system integration UART
Papru Offline
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#1
14.08.2019, 10:51
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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Thomas Offline
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#2
14.08.2019, 11:34
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 and 2021.12.15, FlashSYS v2, ARMv7 Processor rev 5 (v7l), kernel 4.4.151 and 4.4.259
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admin Offline
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#3
14.08.2019, 11:42
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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Papru Offline
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#4
15.08.2019, 06:06
Ok and thanks! Now I know that it can be done. It is only matter of scripting that functionally.
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tomnord Offline
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#5
13.01.2020, 15:32
(15.08.2019, 06:06)Papru Wrote: Ok and thanks! Now I know that it can be done. It is only matter of scripting that functionally.
Any progress here?

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alexll Offline
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#6
13.01.2020, 19:32
I'm interested in that too!
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tomnord Offline
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#7
25.11.2020, 20:53
(14.08.2019, 11:42)admin Wrote: 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
Any recomendations for an adapter?

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admin Offline
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#8
27.11.2020, 08:28
CP2102 is cheap and works well.
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MarcusH Offline
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#9
25.05.2021, 20:22
Hi, I just bought the CP2102. Going to buy the UART interface soon.

Could someone please help me on how I should start code this? Maybe give me some directions and better documentation on how to use this protocol.
The documentation from ajax does'nt explain it very well for a noob Undecided
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tomnord Offline
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#10
25.05.2021, 20:38
It's not an easy task. Eighter way you can not have bith the ajax hub and the uart at once. I got access to the Cloud API instead. Just havent gotten around to do anything about it yet. Will post when I get there.

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MarcusH Offline
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#11
26.05.2021, 06:35
(25.05.2021, 20:38)tomnord Wrote: It's not an easy task. Eighter way you can not have bith the ajax hub and the uart at once. I got access to the Cloud API instead. Just havent gotten around to do anything about it yet. Will post when I get there.

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Is there a new API? or the Enterprise API?
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