Leviton · Decora Smart Series

DW15S-1BZ

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UL CUL FCC

Decora Smart WiFi Switch 15A

Leviton Decora Smart Series Introduced circa 2017

Leviton Decora Smart WiFi switch — no hub required.

Common Applications

Smart wall switch that replaces your existing dumb toggle or Decora switch. WiFi connected — no hub needed. Works with Alexa, Google, HomeKit. The physical paddle still works as a normal switch when WiFi is down. Requires neutral wire. The standard smart switch for North American homes.

Openness & Hackability

Limited / Hub Required

WiFi with cloud connectivity. Cannot flash custom firmware. But has local control — the physical switch always works even without internet. My Leviton app and cloud API are proprietary.

Specifications

Certifications
UL, cUL, FCC
Contact Configuration
SPST 15A/120V
Smart Home Integrations
Alexa, Google Home, HomeKit (some models)
Mounting Type
Single-gang wall box (neutral required)
Protocol
WiFi 2.4GHz

Installation Quick Reference

Panel cutout: 22mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).

Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.

Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.

Dimensions

Wiring Diagram

Troubleshooting

Button doesn't respond when pressed

Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.

Works intermittently

Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.

Button feels mushy or doesn't click

The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.

Where to Buy

Price range

$34.5 — $109.19

across 2 distributors

Quick Specs

Certifications
UL, cUL, FCC
Contact Configuration
SPST 15A/120V
Smart Home Integrations
Alexa, Google Home, HomeKit (some models)
Mounting Type
Single-gang wall box (neutral required)
Protocol
WiFi 2.4GHz

What People Are Saying

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“WiFi with cloud connectivity. Cannot flash custom firmware. But has local control — the physical switch always works even without internet. My Leviton app and cloud API are proprietary.”

Reddit r/homeassistant 38 upvotes View thread →