PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchShort answer: Hornet Nest is a high-capacity, ESPHome-based controller for bringing existing wired alarm circuits into Home Assistant. Its 42 optoisolated zone inputs, PoE support, 12-volt outputs, and local Home Assistant integration make it especially compelling for large homes with individually wired doors, windows, motions, and other circuits.
It is not, however, a drop-in replacement for a professionally monitored, certified alarm system. The wiring work can be complex, native end-of-line supervision is not clearly established by the published material, and alarm behavior may depend on ESPHome, your network, power supply, and Home Assistant configuration.
As an Amazon Associate I earn from qualifying purchases.
What Hornet Nest actually replaces
Hornet Nest is primarily a wired-zone replacement controller. You disconnect sensor circuits from an old alarm panel and connect them to Hornet Nest, which exposes those circuits to ESPHome and Home Assistant.
That is different from an EnvisaLink- or AlarmDecoder-style interface. Those products generally leave the original Honeywell, DSC, or other supported alarm panel in control while translating its status for another system. Retaining the old panel can preserve its keypad, alarm logic, supervision, battery behavior, and monitoring connection.
#1 Best Overall
- A great fit for 1-2 bedroom homes, this kit includes one base station, one keypad, four contact sensors, one motion detector, and one range extender.
- Includes an intuitive Keypad that can arm and disarm your Alarm and Contact Sensors that detect when doors or windows open.
- Choose the Ring Alarm Kit that fits your needs and detect even more with additional Alarm Sensors and accessories (sold separately) at any time.
- Receive mobile notifications when your system is triggered and monitor all your Ring devices all through the Ring app.
- More peace of mind. Subscribe to a compatible Ring Protect Plan (sold separately) to Arm your Alarm from anywhere, keep your system online if the Wi-Fi goes down, and more. Plus, get 24/7 Professional Monitoring for emergency police, fire and medical response, and more.
Hornet Nest gives you more direct control of the wiring, but also transfers more responsibility to you. It is best viewed as a flexible smart-home input/output platform that can form part of an alarm system—not automatically as a complete security appliance.
What you get
The current Crowd Supply listing describes the Hornet Nest Alarm Panel as a commercially available product from Technology Automation Consulting. The listing observed in August 2026 showed the panel in stock at $299, with shipping listed at $8 in the United States and $18 worldwide. It stated that orders generally ship within three business days. Prices, availability, and shipping should be checked again before ordering.
The listed board features include:
- 42 optoisolated alarm-zone inputs.
- Six MOSFET-controlled outputs for 12-volt devices.
- Six 3.3-volt trigger outputs.
- Five additional wESP32 I/O connections.
- Power over Ethernet.
- External 12-volt DC power.
- USB Type-C power and programming through the wESP32 module.
- Wiegand keypad support.
- Individual zone indicators.
- Qwiic expansion.
- A MOSFET-controlled 12-volt reset for four-wire smoke detectors.
- A 3–23-volt DC sensing trigger.
The published dimensions are approximately 262 × 188 mm (10.31 × 7.40 inches), so this is a substantial alarm-panel board rather than a tiny retrofit module.
The product listing says the panel includes a wESP32 USB serial console and programming module. A separate wESP32-Prog-C accessory is also listed at $17, but do not automatically buy one until you confirm the contents of the package you are ordering.
The ESPHome device page presents a condensed specification with different output terminology, including relay and trigger outputs. Treat physical MOSFET outputs, relay outputs, trigger inputs, and firmware entities as distinct categories. The current schematic and user manual—not a simplified feature list—should control wiring decisions.
Why 42 zones matter
A zone is an input circuit, not necessarily one physical sensor. If six window contacts were wired in series to one old alarm-panel zone, Hornet Nest receives one circuit and cannot identify which individual window opened. The 42-input capacity is most valuable when the building has separate cables for separate openings.
Before removing the old panel, make a zone schedule:
Rank #2
- A great fit for 2-4 bedroom homes, this Alarm Kit includes one Base Station, two Keypads, eight Contact Sensors, two Motion Detectors, and one Range Extender.
- Includes an intuitive Keypad that can arm and disarm your Alarm and Contact Sensors that detect when doors or windows open.
- Choose the Ring Alarm Kit that fits your needs and detect even more with additional Alarm Sensors and accessories (sold separately) at any time.
- Receive mobile notifications when your system is triggered and monitor all your Ring devices all through the Ring app.
- More peace of mind. Subscribe to a compatible Ring Protect Plan (sold separately) to Arm your Alarm from anywhere, keep your system online if the Wi-Fi goes down, and more. Plus, get 24/7 Professional Monitoring for emergency police, fire and medical response, and more.
- Photograph and label every existing terminal and cable.
- Record the old panel’s zone numbers and the devices connected to each one.
- Trace whether multiple contacts are combined in series or parallel.
- Identify circuits that need auxiliary power, such as powered motion detectors.
- Separate priority circuits such as smoke, water, garage, tamper, and exterior doors where practical.
- Reserve spare inputs for future construction or renovation work.
For example, a small house might use one input for each exterior door, several window groups, two motions, a garage door, and a water-leak contact. A large house may have dozens of individually wired openings and quickly outgrow a 12-zone controller. A new build can get the most from Hornet Nest by running each important opening to its own central wiring location rather than combining contacts.
What wiring can connect?
Potential applications include:
- Magnetic door and window contacts.
- Wired PIR motion detectors.
- Glass-break detectors with compatible contact or trigger outputs.
- Water-leak contacts.
- Some smoke or carbon-monoxide detector relay circuits.
- 12-volt sirens and strobes.
- Wiegand-compatible keypads.
- External alarm or automation triggers.
“Wired” does not mean “automatically compatible.” Before connecting anything, identify whether the circuit is a dry contact, powered detector loop, relay output, proprietary bus, or supervised alarm circuit. Verify voltage, current, polarity, fusing, inrush current, and the required idle and alarm states.
A proprietary alarm bus should not be connected directly merely because it uses low-voltage cable. Hornet Nest is intended to read compatible circuits, not decode every manufacturer-specific alarm protocol.
Normally open, normally closed, and supervised loops
Basic contact circuits are often configured as normally open (NO) or normally closed (NC). A Home Assistant binary sensor can be inverted when its electrical idle state does not match the desired displayed state, but first establish the actual circuit behavior with appropriate test equipment.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Conventional alarm panels may also use end-of-line (EOL) resistors to distinguish a normal circuit from an alarm, open cable, or tamper condition. The published Hornet Nest material confirms optoisolated inputs, but it does not clearly establish native, selectable single- or double-EOL supervision equivalent to a conventional certified alarm panel.
Do not remove an existing resistor or connect an unknown supervised loop without consulting the current official repository, schematic, and user manual. A community discussion proposed a diode-based workaround for multiple resistance states, but that was an individual suggestion, not an established Hornet Nest feature or substitute for verified manufacturer guidance.
Home Assistant setup
The software onboarding is considerably easier than the electrical installation. The documented path is:
- Connect the panel to a compatible PoE-powered Ethernet connection.
- Open the ESPHome Dashboard.
- Find the device named
hornet-nest-XXXXXX. - Select Adopt.
- Rename the device if desired, then select Adopt again.
- When ESPHome creates the configuration, select Install.
- Wait for the successful upload message.
- In Home Assistant, open Settings → Devices & services.
- Discover the panel and select Configure.
The project’s official GitHub repository contains revision-specific YAML files, factory firmware, schematics, packages, and the user manual. Its current files identify revision 1.2 configurations. Use the configuration matching your hardware revision rather than copying an arbitrary ESPHome example.
No shell command is required for the documented quick-start flow. If you later customize GPIO assignments, substitutions, zones, or automations, keep a backup of the known-good configuration and factory firmware.
Useful Home Assistant automations
Once the circuits are exposed, Home Assistant can provide smart-home behavior such as:
- Sending a notification when a door or window opens.
- Announcing an exterior door over a voice assistant.
- Turning on lights when a motion zone activates.
- Warning when the garage remains open after a set time.
- Displaying every wired zone on a dashboard.
- Logging events in the Home Assistant Logbook.
- Applying different behavior during day, night, vacation, and away modes.
- Triggering a siren or strobe through a properly rated output circuit.
These features provide sensor visibility and automation. They do not automatically provide the complete behavior of a traditional alarm panel, including entry and exit delays, code validation, lockout handling, tamper states, independent siren control, and guaranteed operation during a Home Assistant outage.
What happens during failures?
Before relying on the installation, test each failure mode deliberately:
Recommended Free Tools
| Failure | Possible consequence |
|---|---|
| Home Assistant is offline | Dashboards, automations, notifications, and alarm logic implemented only in Home Assistant may stop. |
| Hornet Nest is offline | Home Assistant loses the panel and its zones. |
| PoE switch fails | The panel may lose both network connectivity and power. |
| LAN fails | Local Home Assistant communication may stop even if the panel remains powered. |
| Internet fails | Local automations may continue, but remote notifications and remote access may not. |
| Power fails | Operation depends on the power design and whether it includes a suitable battery-backed supply. |
| Firmware update fails | USB recovery or factory firmware may be required. |
| Home Assistant reboots during an alarm | Do not assume that alarm logic resumes safely without testing. |
Local ESPHome communication is an advantage over a mandatory vendor cloud, but “local” does not mean fault tolerant. A battery-backed PoE switch or 12-volt supply, network equipment on backup power, independent audible alarm behavior, and a tested recovery plan may be appropriate for higher-assurance installations.
Monitoring and life-safety limitations
Hornet Nest should not be presented as a professionally monitored alarm service. The reviewed project material does not establish built-in SIA/CID central-station support, cellular backup, emergency dispatch, or a monitoring contract. Home Assistant push notifications are not equivalent to professional monitoring.
Rank #4
- Home Security Systems
If emergency dispatch matters, evaluate a listed central-station service, cellular backup, battery-backed power, and a certified alarm controller separately. Retaining the original alarm panel with a compatible interface may be the safer architectural choice when its established monitoring and supervision are still valuable.
The board advertises a reset function for four-wire smoke detectors and may be able to read suitable detector signaling circuits. That does not make it a certified fire-alarm control panel. Detector type, wiring, power, supervision, local code, and listing requirements all matter. Do not rely on a DIY Home Assistant installation as the only smoke or carbon-monoxide life-safety system.
Hornet Nest versus Konnected
Konnected Alarm Panel Pro is the closest commercial comparison. Its published product information describes a 12-zone panel with Ethernet or Wi-Fi, PoE, siren/strobe outputs, Home Assistant compatibility, and expansion by adding panels. The listed starting price observed in the supplied research was $229.
| Criterion | Hornet Nest | Konnected Alarm Panel Pro |
|---|---|---|
| Inputs | 42 optoisolated zones on one board | 12 zones per panel |
| Best scale | Large installations with many individual circuits | Small or medium installations, with modular expansion |
| Integration | ESPHome and Home Assistant | Home Assistant and vendor-supported workflows |
| Power | PoE, external 12 V, and related USB-C options | Published PoE and Ethernet/Wi-Fi options |
| Price comparison | $299 listing observed; one board may replace several smaller units | $229 starting price observed; multiple panels may be needed |
| Trade-off | High capacity and customization, but more DIY responsibility | Conversion-focused workflow, but lower capacity per board |
The fair comparison is total system cost and installation effort, not sticker price alone. A 42-zone Hornet Nest may be economical when it replaces several 12-zone units. For a system with only a few circuits, the larger board may be unnecessary.
When an interface is better than replacement
Consider EnvisaLink, AlarmDecoder, or a manufacturer-specific interface when:
- The existing panel is supported.
- You want to retain its keypad and programming.
- Its supervised loops and local alarm logic are already working.
- Professional monitoring is attached to the existing system.
- You want Home Assistant visibility without making Home Assistant the alarm controller.
The disadvantage is dependence on the exact legacy panel and protocol. Programming may be more complicated, and the resulting data may not expose each sensor exactly as desired. Community reports about particular Honeywell and EnvisaLink combinations are user experiences, not controlled comparisons.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Common installation problems
ESPHome cannot discover the panel
Check PoE power delivery, Ethernet link indicators, VLAN or subnet placement, DHCP leases, hostname resolution, and whether the panel was previously adopted under another name. If discovery still fails, consult the matching revision files and the documented USB recovery path rather than guessing an IP address or recovery command.
Best Value
- Control your home security system with ease using the app remote control feature, giving you peace of mind even when you're away.
- DIY installation made simple, no need for professional help or complicated setups. With a 120Db siren, you can rest assured knowing that any potential intruders will be deterred.
- Stay informed and receive real-time alerts directly to your smartphone through the app, keeping you updated on any suspicious activity. Easily customize your home alarm system to fit your needs, It supports expansion of up to 20 sensors and 5 remote controls/keypads, which can be added to the WiFi alarm station.
- No monthly fees required, saving you money while still ensuring the safety of your home and loved ones. Our door Alarm System is WiFi wireless and works seamlessly with Alexa, providing you with a hands-free experience.WIFI connection, Only works on 2.4GHz WiFi network, does NOT support 5GHz WiFi networks.
- What You Get: 1 wifi alarm base station, 1 keypad, 1 motion sensors, 10 door sensors, 2 remote controls. User manual and friendly customer service.
Adoption works but installation fails
Likely causes include a compile error, stale or modified YAML, a mismatched board revision, network loss during an OTA upload, or insufficient power during flashing. Start with the revision-specific YAML or factory binary in the official repository.
A zone is inverted
Confirm whether the physical circuit is NO or NC, then correct the relevant ESPHome configuration or Home Assistant representation. Do not assume that an inverted entity means the wiring is safe or correctly supervised.
A smoke circuit behaves like an ordinary contact
It may not be one. Smoke systems can be powered, latched, supervised, normally open, normally closed, or relay-based. Identify the detector circuit and follow the current manual instead of treating it like a door contact.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →A siren or strobe overloads an output
Verify voltage, current, polarity, inrush, output type, and fuse requirements. Do not connect an unknown 12-volt siren directly because its nominal voltage appears correct. Use an appropriately rated driver, relay, fuse, and power supply where necessary.
Is Hornet Nest easy?
The answer depends on which part of the job you mean. Adopting the pre-flashed ESPHome device and discovering it in Home Assistant is approachable. Identifying old zone circuits, preserving or redesigning supervision, powering detectors, sizing siren outputs, and designing behavior for outages is not necessarily easy.
Hornet Nest is a strong fit for a technically capable DIY owner, installer, or renovator who has many wired circuits and wants direct local control. It is a weaker fit for someone seeking a polished keypad experience, cellular backup, central-station monitoring, or a certified alarm controller with minimal maintenance.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems
