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PhantomLink DIY Alarm Adapter

Self-Monitored Alarm Adapter

Free Open Hardware Design Email and Text Alerts No Service Fees Adapts Existing Hardware

Save Thousands in Monitoring Fees!

How much do you spend each month on service subscriptions?  $30?  $50?  $70?  More? 

Over time, these fees add up to thousands of dollars.  Is it worth it?  Maybe for some people.  But for others, maybe not.  Depending on the situation and what you're trying to monitor, a self-monitored alarm may be the perfect solution.

Our free open hardware project can help you break free of contracts and monthly fees.  Build it yourself and save thousands!

Introducing the PhantomLink Alert

This simple adapter monitors up to 3 trigger inputs (5VDC or 12VDC) from new or existing alarm sources. 

When the PhantomLink Alert adapter is triggered, it sends an alert to up to 2 email/text message accounts.

Log into the integrated web interface to access the configuration manager and set email server and triggering options.
Text Alarm Monitoring


•  Ethernet Connection
•  3 Trigger Inputs
•  Email and Text Message Alerts
•  Integrated Web Server


•  Industrial Machines
•  Security Systems
•  Climate Controls
•  Automation Systems
•  Process Controllers


No Subscriptions.  No Service Fees.

Unlike other systems on the market that require a subscription or proprietary services, the PhantomLink Alert adapter can be used as a completely self-contained device.

Use your own email service provider or corporate email server.  This means no subscriptions, no service fees, and no contracts!

No more relying on third-party installers and service companies!  The PhantomLink Alert is a 100% do-it-yourself remote monitoring solution.  You have complete control over the entire alert system!  Perfect for custom monitoring applications!

Free Open Hardware Design

100% free and open hardware project to download, build, and use!  No strings attached. 

PhantomLink was originally developed as a commercial project.  But since our other projects are now taking up our time and resources, we're releasing the complete design details and instructions.


Works with any source that can provide a 5V or 12V trigger, including dry contact closures. 

Compatible with 12V devices used in most security systems.

Build fully-customized remote monitoring systems based on the PhantomLink device.
PhantomLink Text Message Alert System

Email Alerts

Send email and text message alerts to up to 2 different accounts.  Each input can be configured to alert different email/text accounts, too, letting you tailor the notification system to your needs.  You can also configure the notification and re-notification intervals to prioritize alerts.

Text Message Alerts

Get text alerts sent directly to your phone.  Simply enter your SMS gateway email address into the PhantomLink Alert, instead of your personal email address. 

Don't know if you have an SMS email address?  You probably do and don't even know it.  It's a little known fact that most cellular phone companies provide this service.  So take advantage of it and have alerts sent directly to your phone!
PhantomLink Text Message Alert System

Web Configuration

Built-in web server provides a full-featured configuration manager.  Configure all email server settings and trigger options through this convenient interface.  Supports most modern web browsers, including the latest versions of Firefox, Chrome, Internet Explorer, Safari (desktop version), and Android.

Mechanical and Wiring Layout

Frequently Asked Questions

How much does it cost? The PhantomLink Alert has been released as a free open hardware project.  Complete circuit schematics and installation instructions are offered free of charge. What is the monthly service fee? There are NO monthly service fees, NO subscriptions, and NO contracts!  This self-contained solution uses your existing internet connection and email services.  You have complete control! What kinds of sensors can I connect to it? The adapter can be triggered by any 5VDC or 12VDC trigger source.  It's also compatible with dry contacts by looping 5V through the system.  12V triggers require a slight modification. Can I use it with my alarm system? Yes.  Just ensure your input to the PhantomLink Alert is a 5VDC or 12VDC trigger.
FREE Open Hardware Design

Technical Specifications

Inputs 3x Digital (5VDC or 12VDC) Supply Voltage 5VDC Supply Current 270mA Trigger Voltage 5VDC or 12VDC Invertible Logic Yes Network Interface Ethernet/Fast Ethernet 10Base-T/100Base-Tx Network Protocol HTTP/SMTP

System Requirements

5VDC Power Supply Ethernet Cable Internet Access