LinkedGo ST802-B - Smart HVAC Thermostat
LinkedGo ST802-B – WiFi-Operated Smart HVAC Thermostat with Advanced Features
The LinkedGo ST802-B smart thermostat, powered by Shelly, provides full control over HVAC systems, including underfloor heating, fan coils, ventilation, and cooling. Designed for single rooms or integration into larger HVAC networks, it delivers advanced automation for optimal comfort and energy efficiency.
Equipped with the ShellyX chip, it offers complete Shelly capabilities, including Wi-Fi and Bluetooth connectivity, hub-free operation, and the ability to act as a Wi-Fi range extender and BLE gateway. The thermostat directly manages underfloor heating valves, fan coil units, AC/DC ventilation fans (including 10V DC via analogue output), and works with connected Shelly relays for electric underfloor heating. RS485/MODBUS support enables professional-level integration into larger HVAC systems.
Built-in safety and precision features include an anti-freeze function to prevent pipe damage, humidity sensing, and adjustable temperature/humidity offsets. Future external sensor support enhances climate control in larger spaces. Smart schedules, sunrise/sunset automation, and scenes allow efficient, energy-saving operation.
Key Features
• Wi-Fi operated – no hub required
• Simple and intuitive interface for easy temperature control
• Full HVAC control: underfloor heating, fan coils, ventilation, and heat sources
• RS485/MODBUS support for integration into larger HVAC systems
• Flexible automation for heating, cooling, and ventilation
• Anti-freeze function to protect pipes during long absences
• Built-in temperature and humidity sensing with adjustable offsets
• Smart schedules and sunrise/sunset automation
• Acts as a Wi-Fi range extender and BLE gateway
• Full Shelly capabilities with compatibility across major smart home platforms
Applications
• Single-room or multi-room HVAC management
• Residential, office, or commercial spaces
• Integration with gas boilers, pellet stoves, and electric underfloor heating
• Energy-efficient climate automation
• Professional HVAC integration using RS485/MODBUS
Technical Specifications
Power
• Power supply: 110–240V ±10% 50/60Hz AC
• Max switching current: 2A resistive load / 1A inductive load
Features
• Temperature control range: 15–35℃
• Temperature measurement accuracy: ±0.5℃
• Humidity measurement accuracy: ±5%
• Ambient temperature: -10°C to 55°C / 15°F to 130°F
• Ambient humidity: 5–95%
Connectivity
• Wi-Fi protocol: 802.11 b/g/n (2.4 GHz)
• Wi-Fi RF band: 2401–2486 MHz
• Wi-Fi max RF power: < 20dBm
• Wi-Fi range: up to 50m outdoors / 30m indoors (depending on construction)
• Bluetooth protocol: 4.2
• Bluetooth RF band: 2400–2483.5 MHz
• Bluetooth max RF power: < 4dBm
• Bluetooth range: up to 30m outdoors / 10m indoors
Dimensions
• Size (H x W x L): 87 x 87 x 39 mm