The system can support 4 module addresses for a total of 16 relay channels. You can even use free pins on the chip as triggers for those zones as well. Currently the library will provide emulation for 2 boards for a total of 16 additionals zones. Features:įull zone expander emulation (4219/4229) which will give you an additional 8 zones to the system per emulated expander plus associated relay outputs. The yaml example also shows how to setup named zones. The yaml attributes should be fairly self explanatory for customization. If you use the zone expanders and/or LRR functions, you might need to clear CHECK messages for the LRR and expanded zones from the panel on boot or restart by entering your access code followed by 1 twice.The directory name is in the "includes:" option of the yaml. To use this software you simply place the vistaAlarm.yaml file in your main esphome directory, then copy the *.h and *.cpp files from the vistaEcpInterface directory to a similarly named subdirectory (case sensitive) in your esphome main directory and then compile the yaml as usual. Just use the code as is without the vistalalarm.yaml and vistaalarm.h files and call it's functions within your own application. The library class itself can be used outside of the esphome and home assistant systems. If you are not familiar with ESPHome, I suggest you read up on this application at and home assistant at. ![]() This info was determined from analysis using a zone expander board and Pulseview to monitor the bus. A keypad with address 16, will send a 1 bit pulse for pulse1 and pulse2 and then it's encoded address on pulse 3. Addresses 8-15 - zone expanders, relay modulesįor example, a zone expander that has the address 07, will send it's address on the first pulse only and will send nothing for the 2nd and 3rd pulse. In actuality the pulses are used as noted below depending on the device type requesting to send: Only the F7 is available for zone and system status in my case but this is good enough for this purpose.Īs far as writing on the bus and the request to send pulsing sequence, most documentation only discusses keypad traffic and this only uses the the 3rd pulse. The system will use persistent storage to recover the last known status of the zone on restart.įrom documented info, it seems that some panels send an F2 command with extra system details but the panel I have here (Vista 20P version 3.xx ADT version) does not. I've also added persistent storage and recovery for zone status in the event of a power failure or reboot of the ESP. You can tweak the TTL setting in the YAML. The panel only sends fault messages when a zone is faulted or alarmed and does not send data when the zone is restored, therefore the TTL timer is used to reset a zone after a preset duration once it stops receiving those fault/alarm messages for that zone. To compensate for the limitations of the minimal zone data sent by the panel, a time to live (TTL) attribute for each faulted zone was used. A custom modified version of Peter Lerup's ESPsoftwareserial library ( ) was also used for the serial communications to work more efficiently within the tight timing of the ESP8266 interrupt window. It has been completely rewritten as a class and adapted to work on the ESP8266/ESP32 platform using interrupt driven communications and pulse timing. ![]() The ECP library code is based on the arduino source code from Mark Kimsal's repository located at. This is an implementation of an ESPHOME custom component and ESP Library to interface directly to a Safewatch/Honeywell/Ademco Vista 15/20 alarm system using the ECP interface and very inexpensive ESP8266/ESP32 modules. Honeywell/Ademco Vista ECP ESPHome custom component and library
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