Insteon
Insteon is a dual-band home automation protocol. Its dual-band devices send every command over both the powerline and a sub-GHz RF mesh, so if one path is blocked the other still carries the signal. Home Assistant talks to an Insteon network locally through a Hub or PLM modem, with no cloud required.
Insteon is a proprietary protocol. Its dual-band devices carry the same message on two physical layers at the same time, the home’s electrical wiring (powerline) and a sub-GHz RF signal (around 915 MHz in North America). Not every device is dual-band: battery sensors and remotes transmit over RF only, and older single-band hardware uses one medium alone. Every mains-powered dual-band device also repeats traffic. The mesh grows more reliable as more dual-band devices are added.
Strengths
- Dual-band redundancy. On dual-band devices, commands travel over both powerline and RF. A device that cannot be reached one way is usually reached the other, which routes around noisy circuits and dead spots. RF-only battery devices and single-band legacy hardware do not get this failover.
- Simulcast mesh. Every dual-band device repeats messages, and the network uses timed simulcasting rather than per-hop routing tables. Latency stays low and setup stays simple.
- Local control. Home Assistant drives Insteon entirely on the local network through a Hub or PLM modem, with no cloud dependency.
Trade-offs
- Single vendor. Insteon is a closed, single-manufacturer ecosystem with no cross-brand device market.
- Legacy status. SmartLabs discontinued Insteon in 2022. The revived company sells a limited catalog, and much hardware is only available secondary-market.
- Battery devices are RF-only. Sensors and remotes transmit over RF alone and need a mains-powered dual-band Insteon device within range to bridge them onto the powerline.
Integration on Insteon
Home Assistant uses the Insteon integration, which connects either to an Insteon Hub (model 2245-222) over the LAN or to a PLM PowerLinc Modem (2413U USB or 2413S serial) attached to the Home Assistant host. Devices must be linked into the modem’s all-link database before they appear in Home Assistant. The optional Insteon cloud subscription is only needed for the mobile apps and remote access, not for local Home Assistant control.
Devices on Insteon
FanLinc 2475F
The Insteon FanLinc (2475F) installs in a ceiling-fan canopy to give independent Insteon control of the fan motor and a dimmable light on separate channels.
Hub 2245-222
The Insteon Hub (2245-222) is the LAN controller that lets Home Assistant drive an Insteon powerline and RF network locally. It puts dual-band Insteon devices on your network for Home Assistant to control, with no Insteon cloud.
KeypadLinc Dimmer 2334-232
The Insteon KeypadLinc Dimmer (2334-232) replaces a wall switch with a dimmer plus a multi-button scene keypad. Each button can trigger Insteon scenes or Home Assistant recipes.
KeypadLinc On/Off 2487S
The Insteon KeypadLinc On/Off (2487S) is an in-wall relay switch with a multi-button scene keypad, for loads that should switch rather than dim. Its buttons drive Insteon scenes and Home Assistant recipes.
LampLinc Plug-in Dimmer 2457D2
The Insteon LampLinc (2457D2) is a plug-in lamp dimmer that adds local dimming control to any table or floor lamp. Its dual-band radio repeats the Insteon powerline and RF mesh.
Micro Open/Close Module 2444-222
The Insteon Micro Open/Close Module (2444-222) is an in-line controller for motorized shades, blinds, and other covers. It drives open, close, and stop locally over the Insteon mesh.
Mini Remote 2342-222
The Insteon Mini Remote (2342-222) is a battery-powered handheld scene controller. Its button presses arrive in Home Assistant as events for Selora AI scene control rather than as entities.
Motion Sensor II 2844-222
The Insteon Motion Sensor II (2844-222) is a battery PIR that reports motion, ambient light, and temperature. Local Insteon alerts keep triggering recipes even when the internet is down.
Open/Close Sensor 2843-222
The Insteon Open/Close Sensor (2843-222) is a battery contact sensor for doors and windows. It reports open and closed locally for security and lighting recipes.
Outdoor On/Off Module 2634-222
The Insteon Outdoor On/Off Module (2634-222) is a weather-resistant plug-in switch for outdoor lighting and holiday displays. It is dual-band and repeats the Insteon mesh outdoors.
SwitchLinc Dimmer 2477D
The Insteon SwitchLinc Dimmer (2477D) is an in-wall paddle dimmer for wired lighting. It is a dual-band device that sends every command over both powerline and RF, and it repeats the Insteon mesh for nearby devices.
SwitchLinc On/Off Relay 2477S
The Insteon SwitchLinc On/Off (2477S) is an in-wall relay switch for lights, fans, and other loads that should not be dimmed. It is a dual-band device and repeats the Insteon powerline and RF mesh.
Thermostat 2441TH
The Insteon Thermostat (2441TH) is a hardwired smart thermostat that Home Assistant reads and controls locally, with setpoints, heat, cool, and fan modes plus temperature and humidity reporting.
Water Leak Sensor 2852-222
The Insteon Water Leak Sensor (2852-222) is a battery leak detector that fires the moment water bridges its contacts. Local Insteon alerts keep working even when the internet is down.