Ajax Alarm system integration UART

Ajax Alarm system integration UART - Printable Version

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Ajax Alarm system integration UART - Papru - 14.08.2019

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-content/uploads/2019/05/protocol_uartBridge_en.pdf

I dont have Ajax yet but I want to know if it is possible to integrate ( at least in theory)

RE: Ajax Alarm system integration UART - Thomas - 14.08.2019

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)

RE: Ajax Alarm system integration UART - admin - 14.08.2019

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

Ajax Alarm system integration UART - Papru - 15.08.2019

Ok and thanks! Now I know that it can be done. It is only matter of scripting that functionally.

RE: Ajax Alarm system integration UART - tomnord - 13.01.2020

(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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RE: Ajax Alarm system integration UART - alexll - 13.01.2020

I'm interested in that too!

RE: Ajax Alarm system integration UART - tomnord - 25.11.2020

(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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RE: Ajax Alarm system integration UART - admin - 27.11.2020

CP2102 is cheap and works well.

RE: Ajax Alarm system integration UART - MarcusH - 25.05.2021

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

Ajax Alarm system integration UART - tomnord - 25.05.2021

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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RE: Ajax Alarm system integration UART - MarcusH - 26.05.2021

(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?