Shelly Plus Add-On | Wi-Fi & Bluetooth Add-On for Shelly Plus Devices | Measure Temperature and Humidity | Home Automation | Works with Alexa & Google Home | iOS Android App | No Hub | Digital Sensor

Price: $16.99
(as of Oct 02, 2026 00:35:26 UTC – Details)

Product description

Motion-Controlled Lights

Shelly Plus Add-On can be connected to a PIR sensor to light up rooms you occasionally use. Enter the room and the light will come on for as long as you need it.

Smart Irrigation

Automate your irrigation system with Shelly Plus Add-On and a soil moisture sensor. The Add-On will trigger Shelly Plus 1 to water your garden only when necessary, saving time and costs.​

Weather-Sensitive Awning

Combine Shelly Plus Add-On with a wind sensor to trigger Shelly Plus 2PM to close awnings during strong winds. Use it with a rain sensor to trigger opening awnings and shelter guests from rain.​

Light Sensitive Control

Use an LDR (photoresistor) with Shelly Plus Add-On and trigger Shelly Plus 2PM to open blinds when it’s too dark during the day or turn on lights at just the right time when luminosity is low.​

Always Informed

Measure precise aquarium and room temperature with Shelly Plus Add-On and DS18B20 sensors. Connect a liquid level sensor to ensure optimal water levels, maintaining a healthy environment for pets.​

Garage Door position

Connect a reed-switch sensor to Shelly Plus Add-On to monitor your garage door’s state. Always know if it’s open or closed when you’re away and take appropriate action.​

Size (HxWxD): 37x42x15 ±0.5 mm / 1.46 x 1.65 x 0.59 ±0.02 in Mounting Flush mounting Ambient temperature -20 °C to 40 °C / -5 °F to 105 °F Humidity 30 % to 70 % RH Power supply voltage DC 3.3 V (from Shelly plus device) Power consumption < 0.5 W (without sensors) VCC max. current 10 mA VREF OUT max. current 1 mA VREF+R1 OUT resistor 10 kΩ Max switching current DC 10 A Digital input -15 V to 0.5 V (True) / 2.5 V to 15 V (False) Analog input range 0 to 100% Analog input report threshold 1% (Can be configured in the analog input) Voltmeter range 0 to 10 V Voltmeter report threshold 0.1 V (Can be configured in voltmeter settings) Analog input / Volt accuracy ±5%

Create Smart Scenes with Shelly Plus Add-On:

Garage door position

Connect a reed-switch to Shelly Plus Add-on for real-time garage door status.

Appliance Power Monitoring

With Shelly Plus Add-on, monitor multiple appliances, identify high energy usage

Adjust lighting by luminosity

With an LDR, Shelly Plus Add-on opens blinds in daylight and triggers lights.

Irrigation only when needed

Using a soil moisture sensor, Shelly Plus 1 triggers efficient irrigation

Always informed

With Plus Add-on and DS18B20 sensors, monitor aquarium and room temperatures.

Weather-responsive awning

Protect motorized awnings from strong wind with Shelly 2PM and wind sensor.

Shelly Plus Add-On is a Wi-Fi gadget for all your Shelly Plus devices, Can be used with up to five DS18B20 (temperature) sensors or one DHT22 (humidity) sensor, the device has an analog and a digital input and is compatible with most Arduino sensors.
Irrigation only when needed – Having a beautiful garden is not an easy task and automating your irrigation system can save you time and optimize your costs. Together with a soil moisture sensor, Shelly Plus Add-on can trigger Shelly Plus 1 to turn on the irrigation only when necessary, always skipping the rainy days.
Control All Your Shelly Plus Devices – Using the Shelly Plus Add-on and two DS18B20 sensors, you can easily measure the precise temperature inside your aquarium. Shelly Plus Add-on with a rain sensor can trigger Shelly Plus 2PM to open the awning just in time to protect your guests and many other combinations that can make you comfortable at your home.
Shelly Customer Service – Shelly is one of the fastest-growing Smart Home brands in the world with devices, providing solutions for the automation of private homes, buildings and businesses. We provide our customers with professional support and a 3 years device warranty.
Shelly Smart Control App will help you control your Shelly devices remotely and will send notifications for all automated events in your home. You can easily configure devices and manage their settings individually, or you can create personalized scenes by combining Shelly devices to trigger certain actions in your home automation.
Customers find the temperature and humidity sensor to be a nice addition to Shelly relays, with positive feedback about its functionality and ease of use. They appreciate its connectivity, with one customer noting it hooks right into Shelly Plus devices.