Dragino LHT65N-NE117-EU868 LoRaWAN Temperature/Humidity Sensor with TI TMP117A Precision Temperature Sensor

The Dragino LHT65N is a LoRaWAN-based sensor for simultaneous acquisition of indoor climate and a second, application-specific measured variable. It combines an integrated temperature and humidity sensor with an external, high-precision temperature probe and transmits both measurements energy-efficiently via LoRaWAN to the IoT platform.

This variant uses a Texas Instruments TMP117A for the external measuring point, achieving an accuracy of ±0.1 °C, significantly better than a standard temperature sensor. It is suitable for applications where small temperature differences are critical, such as calibration, validation of cold chains, pharmaceutical warehouses with GDP requirements, or laboratory climate monitoring.

The integrated datalog function ensures that no measurement data is lost even during temporary connection failures. Buffered values are automatically retransmitted after the connection is restored.

Features:

• LoRaWAN v1.0.3 Class A, EU868 frequency band
• Integrated temperature and humidity sensor
• External Texas Instruments TMP117A precision temperature probe included
• Datalog function with automatic retransmission
• Parameterization via AT commands and LoRaWAN downlink
• Firmware update via programming interface
• Status LED for diagnosis
• Wall mounting
• Multi-year battery life (depending on transmission interval)

Internal temperature sensor:

• Resolution: 0.01 °C
• Accuracy: typ. ±0.3 °C
• Measurement range: −40 to 80 °C

Internal humidity sensor:

• Resolution: 0.04 %RH
• Accuracy: typ. ±3 %RH
• Measurement range: 0 to 96 %RH

External probe:

• Resolution: 0.0078 °C
  
• Accuracy: typ. ±0.1 °C (−20 to +50 °C), ±0.2 °C (−40 to +85 °C)
• Measurement range: −55 to +125 °C

Documents:

• Wiki