LinkedGo ST1820 – Wi-Fi Smart Thermostat (Powered by Shelly)
Overview
The LinkedGo ST1820 is a Wi-Fi-operated smart thermostat powered by Shelly, designed for precise and reliable control of both water-based and electric heating systems. It enables accurate temperature regulation, advanced automation, and built-in safety functions to improve comfort, protect heating systems, and optimise energy efficiency.
Using the ShellyX chip, the ST1820 delivers full Shelly functionality including Wi-Fi and Bluetooth connectivity, hub-free operation, and advanced networking features. It can directly control heating valves, signal gas boilers or pellet stoves via dry contacts, and manage electric underfloor heating when paired with an external relay. With built-in temperature and humidity sensing, smart schedules, and sunrise/sunset automation, it offers a complete and flexible heating control solution for modern smart homes.
Key Features
• Wi-Fi operated – no hub required
• Simple and intuitive interface for temperature control
• Dry contact relay output for boilers, pellet stoves, and heating systems
• Supports water-based heating and electric underfloor heating (via relay)
• Built-in temperature and humidity sensor with adjustable offsets
• Anti-freeze protection to prevent pipe damage during long absences
• Smart schedules and sunrise/sunset automation
• Acts as a Wi-Fi range extender and BLE gateway
• Powered by ShellyX chip with full Shelly platform support
• Compatible with major smart home platforms and automation systems
Technical Specifications
Power
Power supply: 110–240 V ±10% AC, 50/60 Hz
Max switching current: 2 A (resistive) / 1 A (inductive)
Features
Temperature control range: 15–35 °C
Temperature measurement accuracy: ±0.5 °C
Humidity measurement accuracy: ±5%
Ambient temperature: -10 °C to 55 °C
Ambient humidity: 5% to 95% RH
Connectivity
Wi-Fi protocol: 802.11 b/g/n (2.4 GHz)
Wi-Fi RF band: 2401–2486 MHz
Wi-Fi max RF power: < 20 dBm
Wi-Fi range: up to 50 m outdoors / 30 m indoors (depending on construction)
Bluetooth protocol: 4.2
Bluetooth RF band: 2400–2483.5 MHz
Bluetooth max RF power: < 4 dBm
Bluetooth range: up to 30 m outdoors / 10 m indoors
Physical
Size (H × W × D): 85.5 × 85.5 × 38 mm
Installation Notes
• Designed for wall-mounted indoor installation
• Suitable for controlling boilers, heating valves, pellet stoves, and underfloor heating systems
• Electric underfloor heating requires an external relay
• Requires Wi-Fi connection for app control and automation
• Installation should be carried out by a qualified electrician
In the Box
• LinkedGo ST1820 Smart Thermostat
• Mounting accessories
• Quick start guide