VZM31-SN
सक्रियInovelli Blue Series Zigbee 2-in-1 Switch
Inovelli Blue Series — the Home Assistant communitys favorite smart switch.
सामान्य अनुप्रयोग
The smart switch that the Home Assistant community built. Zigbee 3.0, no cloud, no hub vendor lock-in. 2-in-1 switch+dimmer. Multi-tap events (up to 5 taps). Programmable LED notification bar. Works as a switch or dimmer depending on wiring (with or without neutral wire). Firmware is open and community-contributed. If r/homeassistant recommends one switch, it is this one.
Research Notes
1. Overview
The Inovelli Blue Series 2-in-1 (VZM31-SN) is a Zigbee 3.0 in-wall smart dimmer/switch widely regarded as one of the most feature-packed smart switches for enthusiasts. It's configurable as a dimmer or on/off switch, has a multi-color RGB LED notification bar, extensive scene control (multi-tap up to 5× plus hold/release on both the up and down paddles — dozens of triggers), and Zigbee binding so it can control bulbs/groups directly without a hub round-trip. A Smart Bulb Mode keeps power to smart bulbs while sending Zigbee commands. It requires a neutral wire, fits a US single-gang box, and works with Home Assistant (ZHA/Zigbee2MQTT), SmartThings, and Hubitat. Newer firmware has added Matter support on some units.
2. User Sentiment
A cult favorite in the Home Assistant/Zigbee community — praised for the notification LED bar, the enormous number of scene triggers, local Zigbee binding, active firmware development, and Inovelli's responsive community. Common notes: neutral required, the sheer configurability has a learning curve, early firmware had bugs (much improved over time), and physical install is a normal in-wall switch job. For tinkerers it's close to the ideal smart switch.
3. Real-World Applications
Smart dimming/switching plus a programmable scene controller and status indicator in one device — e.g. multi-tap to run whole-home scenes, the LED bar to show notifications (laundry done, doorbell, security), and Zigbee binding to dim bulbs instantly. Great for whole-home Home Assistant setups.
4. Technical Specifications
- Type: In-wall Zigbee 3.0 2-in-1 dimmer/switch (configurable)
- Scene control: multi-tap up to 5× + hold/release, both paddles
- Indicator: RGB LED notification bar (colors + effects)
- Local control: Zigbee binding (direct bulb/group control), Smart Bulb Mode
- Wiring: US single-gang, neutral required; 3-way via aux switch
- Ecosystem: Home Assistant (ZHA/Zigbee2MQTT), SmartThings, Hubitat; Matter on newer firmware
- Approvals: UL, FCC
5. Ordering & Compatibility
Needs a neutral and a Zigbee coordinator/hub (or HA Zigbee stick). Multi-way uses Inovelli's aux switch. Firmware is user-updatable (adds features/fixes). Confirm load type (dimmable LED compatibility) and, for smart bulbs, use Smart Bulb Mode + binding.
6. Hackability & Known Issues
- Hackability: very high. Deep parameter set, local Zigbee binding, notification-LED API, multi-tap scenes, user firmware updates, and full local control via ZHA/Zigbee2MQTT — a favorite for power users.
- Known issues: neutral required, steep configuration learning curve, historical (now largely fixed) firmware bugs, and dimmable-LED compatibility to check. Requires a Zigbee network.
2 sources
- Inovelli Blue Series 2-1 Zigbee Smart Switch (VZM31-SN) — inovelli.com
- Inovelli VZM31-SN Zigbee2MQTT device page — zigbee2mqtt.io
खुलापन और अनुकूलन क्षमता
कस्टम फ़र्मवेयर: Open-source Zigbee firmware (community contributed)
The gold standard for open smart switches. Zigbee2MQTT native support. Full local control — zero cloud dependency. Firmware is open-source on GitHub. Multi-tap events, LED notifications, and bindings all configurable via Z2M or ZHA. No-neutral-wire mode available. The most community-supported smart switch in existence.
स्पेसिफिकेशन
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, FCC
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Device type
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In-wall Zigbee 3.0 2-in-1 dimmer/switch (configurable)
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Features
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RGB LED notification bar; multi-tap scenes (up to 5x + hold, both paddles); Zigbee binding; Smart Bulb Mode
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Smart Home Integrations
Compatible smart home platforms and voice assistants.
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Home Assistant, SmartThings, Hubitat, Zigbee2MQTT
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Matter note
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Matter support added on newer firmware
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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US single-gang wall box
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Protocol
The wireless communication standard. BLE = short range, phone direct. Zigbee = mesh network, needs hub. Z-Wave = mesh, needs hub. WiFi = direct, higher power.
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Zigbee 3.0
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Wiring
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US single-gang, neutral required; 3-way via aux switch
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इंस्टॉलेशन त्वरित संदर्भ
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.
आयाम
समस्या निवारण
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.
कहाँ से खरीदें
मूल्य सीमा
$18.44 — $165.04
2 वितरकों से
संक्षिप्त स्पेसिफिकेशन
- Certifications
- UL, FCC
- Device type
- In-wall Zigbee 3.0 2-in-1 dimmer/switch (configurable)
- Features
- RGB LED notification bar; multi-tap scenes (up to 5x + hold, both paddles); Zigbee binding; Smart Bulb Mode
- Smart Home Integrations
- Home Assistant, SmartThings, Hubitat, Zigbee2MQTT
- Matter note
- Matter support added on newer firmware
उपयोगकर्ता क्या कह रहे हैं
“The gold standard for open smart switches. Zigbee2MQTT native support. Full local control — zero cloud dependency. Firmware is open-source on GitHub. Multi-tap events, LED notifications, and bindings ”