Description
Released in 2020 by Samotech in the UK, the first edition of the SM323 Zigbee Dimmer rapidly earned acclaim among smart home enthusiasts. To meet the escalating demand, we have upgraded and refined its design for a more compact size and additional functionalities. This enhancement extends its compatibility, facilitating its use not only in the UK but also throughout Europe.
The upgraded version of our dimmer boasts a significant advantage: it can be wired with or without a neutral wire. This key feature makes it universally compatible with both UK and EU electrical systems, eliminating the need for complicated rewiring and ensuring an easy installation process. In just a few minutes, you can install your smart dimmer and have it up and running.
Rated for up to 350W, our dimmer switch is versatile enough to handle both energy-efficient dimmable LED bulbs and traditional incandescent/halogen lights, providing robust control over your lighting setup. The Samotech dimmer switch is designed to seamlessly adapt to your existing light fixtures, whether they are modern LEDs or classic incandescent/halogen bulbs.
Our dimmer isn’t just a device; it’s a comprehensive solution for elevating your home lighting into a smart system. It offers broad compatibility with various Zigbee hubs, fosters energy-saving through smart automation, and integrates smoothly with your current lighting setup. The Samotech dimmer switch brings the future of lighting into your home, offering the convenience of remote control, intelligent automation, and a hassle-free installation experience.
Comparison Chart
SM323 V1 vs SM323 V2
| SM323 |
V1 (2020-2023) |
V2 (2023-Present) |
| Size (L × W × H) |
64 × 27 × 24 mm
DISCONTINUED
|
51 × 26 × 24 mm
NEW
|
| Zigbee Clusters |
| • 0x0b04: Electrical Measurement |
❌ |
✔️ |
| • 0x0702: Simple Metering |
❌ |
✔️ |
| Wiring |
| Live only |
✔️ |
✔️ |
| Live + Neutral (no bypass required) |
❌ |
✔️ |
| Compatibility (back box) |
| UK |
✔️ |
✔️ |
| EU |
❌ |
✔️ |
| Lights activation time |
Delay |
No delay |
| Lights activation |
Push only |
Push or Turn |
| 2-Way wiring |
| Light switch compatibility |
Retractive |
Retractive (default);
Standard On/Off*
* Mode activation available upon request at the time of purchase.
Zigbee2MQTT users can now change the mode on their own. |
FAQ
Q: When wired using only the Live wire, lights tend to flicker at full brightness.
A: If your dimmer is installed without a neutral wire, make sure to bridge L and N terminals as indicated in the wiring diagram.
Q: My lights remain faintly lit even when turned off.
A: This phenomenon may occur if the dimmer is connected to a very low load. In such instances, the use of a
bypass is recommended.
Q: The dimmer knob remains stuck in the pressed position and doesn't pop back out.
A: The knob has been fitted too deep. Slightly pull the knob before pushing it again.
Q: The dimmer doesn't always react when the knob is pushed.
A: Slightly pull the knob before pushing it again.
Q: What third party faceplates are compatible with the new SM323 Zigbee modules?
A: Most 1 and 3-gang third-party faceplates are compatible. However, we recommend using original Samotech faceplates, as they provide access to the front reset and brightness adjustment buttons.
Q: What is the method for resetting the lights if the reset button is inaccessible?
A: To reset the dimmer, cycle the power from the consumer unit five times.
Q: Why do my lights flicker rapidly when I adjust the brightness using the dimmer knob?
A: First, verify that your bulbs are indeed
dimmable. If they are, wiring a bypass could help solve the flickering issue.
Q: My lights are constantly flashing after a power cut.
A: The dimmer may have entered Find&Bind mode, typically triggered by three resets or power cycles. To deactivate this mode, please switch off the power to the module at the consumer unit for a short period.
Q: Can two SM323 dimmers be wired together in a 2-way setup to control the same light?
A: No. However, at the other end you can use a standard light switch, a dummy On/Off dimmer, or a retractive (momentary) switch. Retractive switches work with the default Retractive firmware pre-installed on SM323 dimmers, while standard switches or dummy On/Off dimmers require the 2-way mode to be set to Standard.
Q: How do I change the 2 way mode in Zigbee2MQTT?
A:
Make sure your Zigbee2MQTT version is 0.2-1 or newer.To configure your SM323 dimmer module, simply set the
External Switch Type to match your switch:
⚠️ Note: After changing the mode, a power cycle of the SM323 module is required for the changes to take effect.
You can switch between modes at any time to suit your setup.
The v2 Zigbee dimmer connected with my Hue Zigbee hub with no problems. Great that the size is smaller and supports more flexible wiring options!
Small niggles. I was hoping to fit two of these in an an existing dimmer switch using the existing front plate but the dimmers are fractionally too wide to fit, (potentially I could file the plate to adapt). Also the threaded mount that goes through the front plate is 1 or 2mm longer than on the v1 which prevents my existing knob from being able to be pushed. Fine with their own knob.
There are great. The only downside I can comment on is that the power monitoring features are providing garbage data. I suspect that’s something to do with running on no-neutral mode
straightforward to install, although I did need to add a deeper back box (35mm). Integrated immediately with Home Assistant and Z2M.
Generally the dimmers have so far performed as expected. One issue is the labelling on the metal plate on which the dimmers are mounted. Although the plate was drilled for two dimmers and had small holes to allow access to the Brightness and Reset buttons on each dimmer, the letters B and R appear to be stamped on the plate as if it were only mounting a single dimmer, so they did not correctly relate to the function accessible via the nearest small hole. This led to me inadvertently resetting the dimmer when I meant to set the brightness and vice versa. It would be better if either the letters B & R were stamped in positions appropriate to the dimmers actually mounted or omitted altogether.
Really happy with this! Accessible price-wise, and works really well. I particularly like that it works with retractive switches for 2-way setups!
Switch units are very deep, hard to fit with wires into existing wall boxes.
Amazing switches – really pleased!