Shelly Add On
Shelly Plus Add-on – Sensor Interface for Shelly Plus & Gen3 Devices Expand the capabilities of your Shelly Plus and Gen3 relays with the Shelly Plus Add-on. This compact, galvanically isolated sensor interface lets you easily add temperature, humidity, and custom sensors for smarter automations and monitoring. 1-Wire support — Connect up to 5x DS18B20 temperature sensors or 1x DHT22 temp & humidity sensor Analog & Digital inputs — Compatible with most Arduino-style sensors for flexible monitoring Galvanically isolated — Safe and reliable connection to Shelly Plus/Gen3/Gen4 devices Easy plug-on installation — No extra wiring hassles Advanced automations — Trigger scenes based on temperature, humidity, or custom sensor data in Home Assistant, MQTT or Shelly scripting Perfect for — Room monitoring, freezer/fridge alerts, outdoor sensors, pool temperature, solar optimization & more Ideal companion for Shelly relays used in smart home projects, geyser control, underfloor heating, and environmental monitoring. Unlock endless sensor possibilities for your Shelly setup.
Shelly Plus Add-on – Sensor Interface for Shelly Plus & Gen3 Devices Expand the capabilities of your Shelly Plus and Gen3 relays with the Shelly Plus Add-on. This compact, galvanically isolated sensor interface lets you easily add temperature, humidity, and custom sensors for smarter automations and monitoring. 1-Wire support — Connect up to 5x DS18B20 temperature sensors or 1x DHT22 temp & humidity sensor Analog & Digital inputs — Compatible with most Arduino-style sensors for flexible monitoring Galvanically isolated — Safe and reliable connection to Shelly Plus/Gen3/Gen4 devices Easy plug-on installation — No extra wiring hassles Advanced automations — Trigger scenes based on temperature, humidity, or custom sensor data in Home Assistant, MQTT or Shelly scripting Perfect for — Room monitoring, freezer/fridge alerts, outdoor sensors, pool temperature, solar optimization & more Ideal companion for Shelly relays used in smart home projects, geyser control, underfloor heating, and environmental monitoring. Unlock endless sensor possibilities for your Shelly setup.
Shelly Plus Add-on – Sensor Interface for Shelly Plus & Gen3 Devices Expand the capabilities of your Shelly Plus and Gen3 relays with the Shelly Plus Add-on. This compact, galvanically isolated sensor interface lets you easily add temperature, humidity, and custom sensors for smarter automations and monitoring. 1-Wire support — Connect up to 5x DS18B20 temperature sensors or 1x DHT22 temp & humidity sensor Analog & Digital inputs — Compatible with most Arduino-style sensors for flexible monitoring Galvanically isolated — Safe and reliable connection to Shelly Plus/Gen3/Gen4 devices Easy plug-on installation — No extra wiring hassles Advanced automations — Trigger scenes based on temperature, humidity, or custom sensor data in Home Assistant, MQTT or Shelly scripting Perfect for — Room monitoring, freezer/fridge alerts, outdoor sensors, pool temperature, solar optimization & more Ideal companion for Shelly relays used in smart home projects, geyser control, underfloor heating, and environmental monitoring. Unlock endless sensor possibilities for your Shelly setup.
Shelly Plus Add-on – Sensor Interface for Shelly Plus & Gen3 Devices Expand the capabilities of your Shelly Plus and Gen3 relays with the Shelly Plus Add-on. This compact, galvanically isolated sensor interface lets you easily add temperature, humidity, and custom sensors for smarter automations and monitoring. 1-Wire support — Connect up to 5x DS18B20 temperature sensors or 1x DHT22 temp & humidity sensor Analog & Digital inputs — Compatible with most Arduino-style sensors for flexible monitoring Galvanically isolated — Safe and reliable connection to Shelly Plus/Gen3/Gen4 devices Easy plug-on installation — No extra wiring hassles Advanced automations — Trigger scenes based on temperature, humidity, or custom sensor data in Home Assistant, MQTT or Shelly scripting Perfect for — Room monitoring, freezer/fridge alerts, outdoor sensors, pool temperature, solar optimization & more Ideal companion for Shelly relays used in smart home projects, geyser control, underfloor heating, and environmental monitoring. Unlock endless sensor possibilities for your Shelly setup.
in 26 offers
The lowest price for Shelly Add On right now is $12.10 at Digital Bay Tech, compared across 23 retailers.
The all-time low was $11.77 on 9 Sept 2026 — today's price is 3% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 2 Nov 2026.
Last updated at 02/11/2026 09:40:42
Shelly Plus Add-On, Smart Home Interface Plus Relay, Digital Control via WLAN & App, WiFi Home Automation, 3.3 V, Applicable to DS18B20 & DHT22
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shelly Plus AddOn. For Shelly Plus devices, use DS18B20, DHT22 sensors, analog and digital input (Open Box)
Delivery $19.92
Shelly Plus Add-On
Delivery between Thu – Fri $9.95
Shelly Plus Add-On
Next-day delivery $10
Shelly Plus Add-On, Smart Home Automation Australia
Delivery between 5–13 Nov $9.99
Shelly Plus AddOn
Delivery $36.02
Shelly Plus Add-On
Shelly Plus Add-on
Delivery between 4–14 Nov $9.90
Shelly SH-PLUS-ADDON - Shelly Plus AddOn, Connect up to 5
Free delivery between Tue – Wed
Shelly Plus Add-on (SH-SHELLYADDON)
30-day returns
| Measuring Media | Temperature, Humidity |
| Sensor Type | Temperature, Analog, Digital, Humidity |
| Temperature Range | -5°F to 105°F, -20°C to 40°C |
| Measurement Range | 30% to 70% of relative humidity |
| Measurement Resolution | 1% (analog input report threshold) |
Shelly Plus Add-On, Smart Home Interface Plus Relay, Digital Control via WLAN & App, WiFi Home Automation, 3.3 V, Applicable to DS18B20 & DHT22
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shelly Plus AddOn. For Shelly Plus devices, use DS18B20, DHT22 sensors, analog and digital input (Open Box)
Delivery $19.92
Shelly Plus Add-On
Delivery between Thu – Fri $9.95
Shelly Plus Add-On
Next-day delivery $10
Shelly Plus Add-On, Smart Home Automation Australia
Delivery between 5–13 Nov $9.99
| Measuring Media | Temperature, Humidity |
| Sensor Type | Temperature, Analog, Digital, Humidity |
| Temperature Range | -5°F to 105°F, -20°C to 40°C |
| Measurement Range | 30% to 70% of relative humidity |
| Measurement Resolution | 1% (analog input report threshold) |
