Seeed Studio LHT52 Indoor LoRaWAN Air Temperature and Humidity Sensor EU868 is a professional wireless IoT sensor designed for indoor environment monitoring. It measures air temperature and humidity and transmits data via the LoRaWAN v1.0.3 protocol, making it ideal for smart metering, food service monitoring, smart city infrastructure, and building automation.

This sensor works seamlessly with standard LoRaWAN gateways, including SenseCAP M1 and TTN hotspots, ensuring wide compatibility with public and private IoT networks.

Datalog capability ensures no sensor data is missed. Every uplink is recorded, and historical values can be retrieved via downlink commands. Each device comes with unique LoRaWAN OTAA keys, which must be registered in the network server before data transmission begins. The default uplink interval is 20 minutes.

Alarm Function: Users can configure threshold values for temperature and humidity. If readings exceed the pre-set range, the device sends an immediate uplink alert. Alarm mode can be enabled or modified via AT commands or downlink configuration (disabled by default).

Note: LHT52 is primarily designed for indoor monitoring applications.

Features

• Wide Measuring Range: Air temperature from -20 ~ 50C and humidity from 0 ~ 99% RH (No Dew).
• Low Power Consumption: Operates up to 2 years with 2 x AAA LR03 batteries.
• Long-Range Transmission: Data can be transmitted within 35 km via LoRaWAN EU868 band.
• Multi-Platform Support: Compatible with Helium and TTN networks for quick deployment.
• Optional External Probe: Supports external probes such as surface temperature sensors.
• Data Retrievability: Up to 178 historical data records can be retrieved via downlink commands.
• Alarm Function: Immediate uplink alerts when thresholds are exceeded, configurable via AT commands.
• Flexible Parameter Configuration: Supports AT commands and LoRaWAN downlink for remote configuration.

Seeed Studio LHT52 Indoor LoRaWAN Air Temperature and Humidity Sensor EU868 is a compact, reliable, and energy-efficient solution for IoT-enabled indoor climate monitoring, ensuring accurate data collection and seamless integration into LoRaWAN networks.

Specifications

Applications

• Exhibition Environment Monitoring: Maintain relative humidity at 45% and temperature between 65F68F to extend the longevity of antiques and collections.
• Basement/Garage Monitoring: Ideal for storage areas sensitive to temperature and humidity fluctuations.
• Greenhouse Monitoring: Ensures optimal growth conditions with temperatures between 8085F (26.529.5C).
• School/Office Indoor Monitoring: Protects health and comfort by keeping humidity between 30%50% and air temperature between 70F78F.

Dimensions

Compact Size: 5.8 x 5.8 x 2.0 cm

Part List

Documents

LHT52 LoRaWAN Temperature and Humidity Sensor -DatasheetLHT52 LoRaWAN Temperature and Humidity Sensor -User Manual

Certification