Getting specifications, connection paths, and resources ready.
Model: S4DM-0A102US
A US in-wall dimming module for 120 V, 60 Hz installations with a neutral wire. It supports local Wi-Fi control, Matter and a selectable Zigbee profile. Home Assistant can use the local Shelly Wi-Fi integration.
Catalog-level details. Controllers, bridges, accounts, and available features depend on the connection route.
Shelly USA (official store). Confirm the exact variant before choosing. Store prices and availability can change; product-information pages are not store offers.
What to know about this device before choosing a connection.
A recommendation is not recorded yet. Compare the requirements below with your home and the capabilities you need.
Exact US S4DM-0A102US technical/API documentation rechecked October 10. Neutral is required. Standalone local Wi-Fi control needs no separate vendor hub; Matter/Zigbee need their respective controllers. Matter is default; five control-button presses select Zigbee inclusion for three minutes. BTHome components are unavailable in Zigbee mode. Power readings are documented; accumulated energy and exact Home Assistant meter entities remain unknown. The earlier conflicting no-neutral marketing assertion remains rejected as installation guidance. US S4DM-0A102US load limits: dimmable LED lamps up to 150 W; incandescent or halogen lamps up to 200 W. Maximum output current is 1.7 A; overall output power is at most 200 W. The two output terminals are internally bridged, not independent 200 W channels. The separate iron-core transformer limit is 200 VA. Follow the exact manual and compatible-load requirements; these ratings do not approve motors or all LED drivers.
Check your ecosystem, then choose a connection method for its requirements and available controls.
A listed ecosystem is a starting point. Connection methods and exposed capabilities must be checked for the exact variant.
Reviewed guide
A documented connection is available. Check its equipment, account, firmware and feature requirements.
Home Assistant via Shelly over Wi-FiCatalog listing only
Compatibility has not been established for this exact model. This does not mean it is incompatible.
Catalog listing only
Compatibility has not been established for this exact model. This does not mean it is incompatible.
Catalog listing only
Compatibility has not been established for this exact model. This does not mean it is incompatible.
Catalog listing only
Compatibility has not been established for this exact model. This does not mean it is incompatible.
No verified evidence yet
Compatibility has not been established for this exact model. This does not mean it is incompatible.
No verified evidence yet
Compatibility has not been established for this exact model. This does not mean it is incompatible.
Missing documentation does not mean a device is incompatible. Reviewed documentation is not a physical hardware test.
Basic controls on the reviewed connection. Setup, remote access, voice services and firmware updates have separate requirements.
S4DM-0A102US · US · Documentation reviewed. Check the unit’s hardware and firmware before setup.
Documented controls may have firmware or configuration conditions. Read the guide before relying on a feature.
Open setup guideInstallation & device requirements · Manuals & resources · All connection details
Choose a documented method. Requirements, controls, local/cloud behavior, and evidence stay attached to that route.
Home Assistant · US · S4DM-0A102US
Documentation reviewed · 10/18/2026. Not tested on physical hardware.
Dimmer Gen4 US
Home Wi-Fi
To Shelly integration
Shelly integration
To Home Assistant
Home Assistant
Complete the required items before setup. Items marked “Not required” are optional for this route.
Documented
Exact US 120 V, 60 Hz in-wall dimmer with neutral required.
Derived from documentation
Use the dimmer on 2.4 GHz home Wi-Fi with its local API reachable from Home Assistant.
Documented
You need an existing Home Assistant installation and access to its settings.
Documented
Use Shelly in Devices & services. No community add-on is part of this route.
Not required
No Shelly Cloud account is needed for the local RPC integration.
Not required
No separate Zigbee or Matter bridge is part of this local Wi-Fi/RPC path.
Documented
Follow the manufacturer's setup instructions to join the dimmer to home Wi-Fi. Use its embedded web interface to confirm connectivity; this guide assumes the device is already installed and powered correctly.
Documented
Accept discovery, or choose Settings → Devices & services → Add integration → Shelly and enter the dimmer's local address if asked.
Derived from documentation
Find its light entity and confirm on/off and brightness respond before creating automations.
Derived from documentation
The US dimmer has one light component. Home Assistant documents light control and transition support; exact advanced entities are not checked on hardware.
Not yet verified
The device has a meter. Exact Home Assistant entities for this model have not been verified in this review.
Documented
Connect locally over Wi-Fi; cloud enrollment is not required for this path.
Documented
Local communication; no Shelly cloud connection needed.
Documented
Separate Home Assistant remote access is needed. Cloud and VPN options have their own requirements.
Derived from documentation
A rule using this local switch can run on your Home Assistant host. Cloud-based triggers or actions add their own dependencies.
Not yet verified
The integration offers an update action; a fully offline update process was not verified.
Not yet verified
An exact minimum version for this Gen4 model is unverified. Review the current enhanced-security guidance if connection setup fails.
Documented
Built into Home Assistant and documented by its maintainers.
Derived from documentation
Configuration effort assumes a working Home Assistant host and an installed dimmer. Electrical installation is separate.
Shelly · manufacturer · Checked 2026-10-10
Identifies the US 120 V dimmer, neutral requirement and local web control.
Source location: Device identification; local Wi-Fi operation; electrical specifications
Shelly · manufacturer · Checked 2026-10-10
The exact US dimmer exposes a light component and local Wi-Fi/RPC. BTHome is not available in its Zigbee mode.
Source location: Device description and components
Home Assistant · platform · Checked 2026-10-10
The built-in integration supports all four generations. Gen2+ uses RPC directly without cloud. Devices can be discovered or added by host address. Relays become switch entities by default. HTTPS behavior changes with enhanced security.
Source location: Configuration; device generations; Gen2+ configuration; consumption type; enhanced security; OTA update
Home Assistant · platform · Checked 2026-10-09
Automations combine triggers, optional conditions and actions. Their external dependencies depend on the selected entities and services.
Source location: Parts of an automation; creating automations
Home Assistant · platform · Checked 2026-10-09
Compare the documented support source and effort for each route. Official/community support and local/cloud operation are separate questions.
Built into Home Assistant and documented by its maintainers.
Check status & evidenceConfiguration effort assumes a working Home Assistant host and an installed dimmer. Electrical installation is separate.
Check status & evidenceSee how it can help your network and which other connection functions it offers. Each answer applies to its documented protocol and operating mode.
✓ Zigbee router
Helps relay Zigbee traffic for other devices when operating in this mode.
The exact US API references the table that labels the dimmer as a Zigbee router.
Manufacturer explicitly documents Zigbee repeating for this US dimmer, when joined to a compatible Zigbee mesh.
Applies to mesh participation: the exact-model extender claim combined with Zigbee router topology.
Exact firmware-dependent activation and mode-switching details need further verification.
Documentation reviewed. Not tested on physical hardware.
Each function has its own evidence and operating conditions. Protocol support alone does not establish extension or gateway behavior.
✓ Supported
Can extend Wi-Fi connectivity for compatible devices through its access point. Check configuration and mode conditions below.
Operating profiles
The exact-model API documentation says five control-button presses select Zigbee and start inclusion for three minutes. BTHome components are unavailable in Zigbee mode. These documented switching steps do not establish simultaneous operation or every hardware/firmware version.
Manufacturer documents Wi-Fi signal extension; it is separate from Zigbee mesh repeating.
Confidence: high · Last verified: 2026-10-10
The US model explicitly supports Zigbee repeating, Wi-Fi extension, BLE gateway and Matter.
The exact US API page links its supported Zigbee features to the manufacturer's device table.
Documentation reviewed, not tested on physical hardware. This does not establish every feature exposed through an ecosystem route.
✓ Supported
Can act as a gateway for compatible Bluetooth LE devices. Supported devices and operating modes matter.
Operating profiles
The exact-model API documentation says five control-button presses select Zigbee and start inclusion for three minutes. BTHome components are unavailable in Zigbee mode. These documented switching steps do not establish simultaneous operation or every hardware/firmware version.
Choose a connection method for its app, account and controller requirements. An app used by one method is not necessarily required for every connection.
Controllers for the reviewed connections are listed below. These requirements do not apply automatically to other setup methods.
Open connection instructions Find manuals and installation diagramsSetup and software downloads have separate requirements from everyday local control. A completely offline setup has not been established by these summaries.
Requirements apply to this setup method.
Connect locally over Wi-Fi; cloud enrollment is not required for this path.
Check evidenceYou need an existing Home Assistant installation and access to its settings.
Check evidenceUse Shelly in Devices & services. No community add-on is part of this route.
Check evidenceNo Shelly Cloud account is needed for the local RPC integration.
Check evidenceNo separate Zigbee or Matter bridge is part of this local Wi-Fi/RPC path.
Check evidenceExpand a group to see all recorded attributes. Electrical maxima depend on load type; check operating and installation limits in the exact model documentation. Route-specific feature availability can differ. Missing fields are not a confirmed “No.”
Check the model, region, hardware revision, and document version. Connection-specific sources are linked in each guide.
Shelly Dimmer Gen4 US · S4DM-0A102US · Archive started 2026-09-28. Individual additions may be newer. These files open from Dwelleno.
Original manufacturer page
Original manufacturer files, including its safety instructions. Diagrams may show different AC and DC configurations; check the exact model and supply type.
Earlier observations checked 9/28/2026. Later observations state their own dates. Certification claims below are attributed to the manufacturer.
Exact-model load evidence checked October 15, 2026. US S4DM-0A102US load limits: dimmable LED lamps up to 150 W; incandescent or halogen lamps up to 200 W. Maximum output current is 1.7 A; overall output power is at most 200 W. The two output terminals are internally bridged, not independent 200 W channels. The separate iron-core transformer limit is 200 VA. Follow the exact manual and compatible-load requirements; these ratings do not approve motors or all LED drivers.
Manufacturer sourceReviewed documentation, catalog records, and manufacturer observations have different scopes. A source for one capability does not establish every feature.
Connection guides preserve source dates, publishers, review status, and claim-level links. “Documentation reviewed” does not mean tested on physical hardware.
Documentation reviewed Oct 18, 2026 · S4DM-0A102US · US
Other active devices in this category. Their connection requirements and capabilities may differ.
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Access from away needs a separate Home Assistant remote-access configuration, such as Home Assistant Cloud or a VPN.
Source location: Remote access options
Bluetooth gateway condition
Exact US API explicitly limits BTHome availability in Zigbee mode.
Manufacturer documents a BLE gateway.
Confidence: high · Last verified: 2026-10-10
The US model explicitly supports Zigbee repeating, Wi-Fi extension, BLE gateway and Matter.
The exact US API page links its supported Zigbee features to the manufacturer's device table.
Documentation reviewed, not tested on physical hardware. This does not establish every feature exposed through an ecosystem route.
✓ Supported
Supports a documented Matter operating mode. Available controls depend on the chosen ecosystem and connection route.
Operating profiles
The exact-model API documentation says five control-button presses select Zigbee and start inclusion for three minutes. BTHome components are unavailable in Zigbee mode. These documented switching steps do not establish simultaneous operation or every hardware/firmware version.
Manufacturer documents Matter compatibility; no Thread Border Router claim follows.
Confidence: high · Last verified: 2026-10-10
The US model explicitly supports Zigbee repeating, Wi-Fi extension, BLE gateway and Matter.
The exact US API page links its supported Zigbee features to the manufacturer's device table.
Documentation reviewed, not tested on physical hardware. This does not establish every feature exposed through an ecosystem route.
Shelly Plus 1PM, EU/non-UL press photographPhoto: Vibrant Frame / Shelly, via D/P Communications & Media.
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Compact Wi-Fi switch module with power measurement. Exact model SNSW-001P16EU (Shelly Plus 1PM).
S4SW-001P8EU · In-Wall Relay Modules
Reviewed guides: Home Assistant →
A compact in-wall relay with power measurement and local Wi-Fi control. It requires neutral and supports Matter or a selectable Zigbee profile. Home Assistant readings depend on the connection path and firmware.
Shelly USA (official store)
WAVE1 · In-Wall Relay Modules
