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
a.k.a. Candeo, HK_DIM_A, Dimmer-Switch-ZB3.0
|
SM323 V2
|
| Size (LxWxH) |
 64x27x24mm
DISCONTINUED
|
52x27x24mm
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. For double and 4-gang setup, original Samotech faceplates required.
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: 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.
Technical Data
Zigbee Dimmer Switch Module
| Manufacturer |
SAMOTECH |
| Part number |
SM323V2-PRO |
| Item Weight |
30g |
| Product Dimensions |
52 x 27 x 24 mm |
| Type |
Trailing Edge Dimmer |
| Protocol |
Zigbee 3.0 |
| Device type |
Router |
| Input Voltage |
230VAC |
| Light control |
On/Off, Dimming |
| Frequency |
2.4GHz |
| Max LED Wattage |
175 w |
| Max Incandescent Load |
350w |
| Max Halogen Load |
350w |
| Wiring requirements |
Live only or Live + Neutral |
| Switch Type |
2-way |
These are awesome. Highly recommended. Will be buying more to get the whole house covered
I’ve tried a number of Zigbee dimmers and these are the best I’ve tried. The ability to set the minimum brightness which works on both the physical rotary and the setting in the Zigbee Home Automation via Home Assistant. Plus no flickering.
Ordered the zigbee dimmer modules, operate faster/smoother than originals, still a little too wide for most off the shelf face plates but better than previous version. Shame there isn’t a chrome faceplate version.
The product works really well, the only annoyance is it is slightly wider than most dimmer modules, and will hardly fit in double plates of other manufacturers (to keep the aesthetics).
I’d love to see a sync feature implemented, so multiple dimmers could be connected in order to control a Master dimmer from different locations. It is not very hard to do as Zigbee supports it. 3 events would suffice: toggle, +delta_brightness, -delta_brightness. Take the suggestion! 😉
Not being able to detach the Dimmer from light is a big let down
Consistently works well without dropping out. Secondary switch behaviour could perhaps be refined but overall I’m very happy with these throughout my house.
Great piece of kit, easy to set up, good value for money, well made
The actual dimmer is the best on the market. I’m planning on having these controlling every single light in my house. The face plates are a bit cheap feeling, but there are loads of options around that.