An Arduino is used to decode the commands from the alarm system and interface with the SmartThings hub. The IT-100 interface is connected to the communication and power lines of the DSC alarm panel (AUX+/AUX- for power and GRN/YEL for data). Open the HomeAlarm.ino file and enter your pin at the right location (see the comments).Libraries and source of the Arduino folder in this repository.If you are on a different shard, you need to change the links below for your right shard.As an example, in North America, Determine your shard, please consult this thread:.Able to arm/disarm, monitor zone status and trigger the panic alarm.Īuthor: Vassilis Varveropoulos, Brice Dobry
#DSC SERIAL PROTOCOL SERIAL#
Parallel to Serial Conversion Serializer Serializer FEC FEC.ĭSC Alarm interface to SmartThings. Essentials of DisplayPort Display Stream Compression (DSC) Protocols. I have the DSC module in labview and am using a serial. Dsc modbus - Serial communication input/holding registers. I'm not sure why Zone 1 and zone 2 are the same and Zone 3 and Zone 4 - I was getting a definate bit set for each LED - good luck if You are still working on it.Modbus is a serial communication protocol. The statement about rising edge clock vs the falling edge clock is correct - then each bit of data represented a keypad button or an LED on the keypad depending on data direction.
#DSC SERIAL PROTOCOL SERIES#
What model of alarm panel is it? I did a similar thing years ago with a DSC PC1550 (Classic series panel) - nor sure how much has changed with the newer panels. Thanks for that, I don't believe the data to be encrypted as another person on avrfreaks managed to find the bit that is set when the alarm is armed and unset when it isn't (hrm i can't put in newlines in this comment) It's starting to take shape. With NRZ you are just checking if there was a change or not. The fact that it changes on both clock edges is just a sign that both clock edges represent a point that a 'bit' of data occurs. I cannot open the files right now, but I hope this helps. That is my best informed guess based on your explanation. On the note of the synchronous protocol, chances are that the protocol is a. With some work and more questions you might successfully figure out the kind of encryption, and then, if it is poorly implemented, decode it.Ĭhances are that the keypad has a very simple protocol and the controller has some strict constraints on how many button pushes it will accept and such. There is no simple answer to decoding a protocol, if they have a good encryption scheme setup then you are probably going to be up &$%* creek. The Data line appears to change on on either rising or falling edge of the clock (0 is the Data line, 1 is the Clock line). The Clock line is confusing tho, its a 1kHz clock at 50% duty but only runs for 41.600ms then it goes high for 5.400ms and then starts over again.
![Dsc Serial Protocol Dsc Serial Protocol](https://image.slidesharecdn.com/i2cprotocolandds1307rtcinterfacing-161017105937/95/i2c-protocol-and-ds1307-rtc-interfacing-5-638.jpg)
#DSC SERIAL PROTOCOL HOW TO#
So has anyone messed with this before or can give me a few beginners tips on how to reverse engineer this protocol? The wiring is simple: Vcc, GND, Data, Clock The Vcc is +12 volts and the data/clk lines are between +8-10 but work just fine through a voltage divider to the logic analyzer. I'm plan to interface a atmel avr with my alarm system in home but the issue is DSC has a propriatary protocol between the keypad and the base. Since the company’s genesis, the experts at DSC have been leading the way. DSC (Digital Security Controls) is a world leader in electronic security. IT-100,DSC Serial Integration Module RS232 Serial Interface - Buy online at Aartech Canada.
![Dsc Serial Protocol Dsc Serial Protocol](https://user-images.githubusercontent.com/12835671/61560425-daa6e180-aa31-11e9-9efe-0fcb44d2106a.png)
Integration option via RS232 serial connection Contact your DSC distributor.