The Shelly 1PM Mini GEN4 is the latest, fourth-generation version of Shelly’s compact single-channel smart relay with integrated power metering. Like its predecessor, it supports switching up to 8A of current and includes built-in energy monitoring that can be tracked in real-time via the Shelly app.
As with all Shelly devices, the 1PM Mini GEN4 can connect directly to your Wi-Fi router without the need for a local hub, bridge, or gateway. It also features native Matter compatibility. Additionally, Shelly GEN4 devices support an alternative communication mode, which must be selected before pairing. This allows the device to operate over Zigbee, enabling connection to a Zigbee gateway or coordinator. Regardless of the selected mode, the device is perfectly suited for automating a light or other electric consumer – or even for integration into a full smart home system, such as in a property undergoing renovation.
This is one of the smallest-sized smart relays on the market that supports both Wi-Fi and Zigbee control. Its ultra-compact form allows it to fit easily behind standard wall switches or inside junction boxes – even when retrofitting.
When installed behind existing wall switches, the Shelly 1PM Mini GEN4 enables remote control of your lighting or other connected appliances, while keeping manual switch operation fully functional. This makes it ideal for smart upgrades to existing electrical systems. It works well behind momentary or toggle switches, but due to its 8A current limit, it’s not recommended for outlet control.
The relay includes a switch input, so you can continue using your wall switch while also controlling the device remotely via Wi-Fi. You can also configure auto on/off timers, and if needed, the physical switch input can be disabled via the app – a useful safety feature, for instance, in children’s rooms.
The Shelly 1PM Mini GEN4 is compatible with both toggle and momentary (push-button) wall switches, and it can be configured for two-way or cross (staircase) switch setups. The auto-off feature can also be used to enable pulse (impulse) switching.
Power Metering Functionality
The built-in power meter allows precise monitoring of the connected load’s consumption. The app displays both real-time power (W) and total energy usage (kWh), helping you optimize energy usage and reduce electricity costs in your home.
Reliable Performance – What’s New in GEN4
The Shelly 1PM Mini GEN4 uses the new ESP-Shelly-C68F chip, which delivers faster processing, more stable connectivity, and improved energy efficiency. The 8MB flash memory is double the size of previous generations, and the device supports enhanced Wi-Fi and Bluetooth communication. It also includes overheating protection for added long-term safety and reliability.
Communication Modes
You can select the device’s communication mode before pairing:
- Wi-Fi and Bluetooth for local and remote network control
- Zigbee mode for integration into Zigbee-based smart home systems
Regardless of the chosen mode, the Shelly 1PM Mini GEN4 is ideal for controlling lights and other electrical appliances in smart automations.
Automation Features
- Real-time power measurement and energy tracking
- Scheduled switching (up to 20 programmable events)
- Auto-on and auto-off timers
- Sunrise/sunset-based control with ±23-hour offset
- HTTP/HTTPS webhook support for third-party integrations
- Custom automation via mjS scripts, triggered by inputs, outputs, sensor data, or network events
- Simultaneous execution of multiple scripts
Operating Modes
- Cloud mode: full remote control via the Shelly Cloud app
- LAN mode: works locally without an internet connection
- Wi-Fi Access Point mode: the device creates its own Wi-Fi network when none is available
- Zigbee mode: for use with Zigbee gateways and coordinators
Integrations and Compatibility
The Shelly 1PM Mini GEN4 integrates easily with numerous systems and platforms:
- Supports MQTT and REST API
- Voice control via Google Home, Amazon Alexa, and Yandex Alice
- SmartThings integration through the Shelly Cloud
- Apple HomeKit compatible (thanks to Matter standard compatibility)
- Also compatible with: Homey, Home Assistant, openHAB, Domoticz, ioBroker, HomeSeer, nymea, Hubitat, Hoobs, SYMCAN, and many more
- Simultaneous use of Shelly Cloud and MQTT is supported
Installation
Thanks to its compact size, the device fits easily behind standard wall switches and into electrical boxes.
Perfect for automating devices with a load of 8A or less.
Technical Specifications
- Operating voltage: 110–240V AC
- Max load: 8A (240V AC) or 5A (30V DC)
- Power metering: Yes
- Dry contact switching: Not supported
- Communication: Wi-Fi, Bluetooth, Zigbee (depending on selected mode)
- Processor: ESP-Shelly-C68F
- Memory: 8MB flash
- Operating temperature: -20°C to +40°C
- Operating humidity: 30% to 70% RH
- Overheating protection: Yes
- Switch input: Yes
- Bluetooth gateway and Wi-Fi repeater functionality: Yes
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