Seeed Studio LHT65N LoRaWAN Temperature & Humidity Sensor (868MHz) is a long‑range wireless sensor designed for accurate monitoring of air temperature and humidity. It integrates a built‑in Temperature & Humidity Sensor and provides an external sensor connector for additional probes such as soil moisture sensors, tilting sensors, or external temperature probes. The Seeed Studio LHT65N 868MHz LoRaWAN Temperature & Humidity Sensor enables users to transmit data over extremely long ranges with ultra‑long spread spectrum communication. It offers high interference immunity while maintaining low power consumption. This makes it suitable for professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, and building automation. The LHT65N LoRaWAN Sensor is equipped with a built‑in 2400mAh non‑rechargeable battery that supports more than 10 years of operation. It is fully compatible with the LoRaWAN v1.0.2 protocol and works seamlessly with standard LoRaWAN gateways. The device also supports up to 3200 data records with timestamp, which can be retrieved for further analysis. Note: The LHT65N Temperature & Humidity Sensor is mainly designed for indoor environment monitoring. Features Wide Measuring Range: Measures air temperature from -40 ~ 80°C and humidity from 0 ~ 96.0 %RH. Low Power Consumption: Built‑in 2400mAh battery provides more than 10 years of service life. Long‑Range Transmission: Reliable LoRaWAN 868MHz communication within 3 ~ 5 km. Multi‑Platform Compatibility: Quick integration with Helium, TTN, and other LoRaWAN IoT platforms. Optional External Probe: Supports external probes for extended applications such as surface temperature detection. Data Retrievability: Up to 178 historical data items can be extracted via downlink command. Alarm Function: Configurable alarms allow users to focus on critical data requiring action. Flexible Parameter Configuration: Supports AT commands and remote configuration through LoRaWAN downlink. Specifications Air temperature Range -40 ~ 85 °C Resolution 0.01 °C Accuracy Typ ±3 °C Long Term Drift < 0.02 °C/yr Air Humidity Range 0 ~ 96 %RH Resolution 0.04 %RH Accuracy Typ ±3 %RH Long Term Drift < 0.02 °C/yr External Temperature Probe Name AS-01 base on DS18B20 Accuracy Range ±0.5°C accuracy from -10°C to +85°C ±2°C accuracy from -55°C to +125°C Resolution 0.0625°C Operation Temperature -40 °C ~ 125 °C Cable Length 2 meters Working voltage 2.35v ~ 5v Applications Wireless Alarm and Security Systems Home and Building Automation Automated Meter Reading Industrial Monitoring and Control Long range Irrigation Systems,etc. Dimensions and Weight Device: Size:135 x 70 x 30 mm/pcs Weight: 105g Package: Size:145 x 80 x 50 mm/pcs Weight: 170g Documents Datasheet User Manual Certification HSCODE 9025900090 USHSCODE 9025900600 UPC EUHSCODE 9013101000 COO CHINA Package Includes 1 x LHT65N 1 x DS18B20 Temperature Sensor
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