Will this work with the older Vista 20se

I also had a Vista 20SE. The module would not work with it. I purchased a Vista 20P panel for $48, and made a terminal-screw for terminal-screw swap of the board, then re-programmed the board. Note: You have to reprogram the new board to match what was on the old one. So if you don't have your programming cheat-sheet, then you will need to cycle through all the settings on the old board, write them down, and then program them into the new board. And then you will need to make the necessary changes to support the EVL-4. Plan to spend the day doing it. Or two. Mine has been up and running for two years now.

I bought a home with a DSC 1616 panel & RFK5564 keypad that was installed by ADT. I don't know the master codes. Can I still use this?

Installer code should either be 6321 or the last 4 of the previously used account number. If you cannot find out the last 4 ADT might tell you if you call and explain the situation. Otherwise like previous answers mentioned you would have to default the panel by placing a jumper between pgm1 and zn1, power up panel for 5 seconds than power back down and remove jumper. That will default the panel and will need to be programmed from scratch

Can I use this module with tuxedo touch wifi keypads ?

If you have a tuxedo touch you are already able to connect to it through its built in web browser locally. Forward a single port on your router, set a local static ip to the tux and match that ip and port in your router. This way you'll be able to remote into the tux from anywhere and have full access of your alarm and automation. Updated firmware UV the tux will also give you email notifications.

The 4 wires from evil to what pins on Honeywell 20P panel (pins 1 through 16)? Note that 20p pins have no colors name written.

Terminals are numbered from left, starting with #1. Black 4, red 5, green 6 and yellow 7. Same terminals as the key pad(s).

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🔒 Stay ahead of threats with smart security at your fingertips!

EFFORTLESS SETUP - Auto IP address detection means zero router hassle—plug in and go live in minutes.
WEB VOIP FRIENDLY - Manage your alarm system through any standard web browser or VOIP device for ultimate flexibility.
STAY INSTANTLY CONNECTED - Receive text & email alerts to monitor your security system anywhere, anytime.
UNIVERSAL PANEL COMPATIBILITY - Works flawlessly with top Honeywell Vista and DSC PowerSeries panels for broad security coverage.
SEAMLESS SMARTPHONE INTEGRATION - Control your Honeywell Vista or DSC system via a sleek virtual keypad on your mobile device.

The EYEZ-ONEnvisalink EVL-4 is a compact, plug-and-play IP interface module that transforms Honeywell Vista and DSC alarm panels into smart, remotely controllable security hubs. With real-time text and email alerts, smartphone virtual keypad access, and browser/VOIP compatibility, it offers professional-grade monitoring and control without complex setup.

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Manufacturer	EyezOn
Part Number	EVL-4EZR
Product Dimensions	11.94 x 7.87 x 3.05 cm; 58.97 g
Item model number	EVL-4
Size	Single
Colour	Blue
Power Source	Corded Electric
Voltage	1.5 Volts
Installation method	plug-in
Item Package Quantity	1
Included Components	EVL-4EZR Module, mounting stand-offs, 2-way tape, connecting wire, installation guide
Batteries included?	No
Batteries Required?	No
Battery Cell Type	Lithium Ion
Item Weight	59 g

EYEZ-ONEnvisalink EVL-4 IP Security Interface Module

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