LDDS75 LoRaWAN Distance Detection Sensor

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Based on the LSN50 Open Source platform, The waterproof (IP68) LDDS75 offers long range connections to LoRaWAN networks. The LDDS75 uses ultrasonic sensing to measures distances between 280-7500mm (in typical conditions, around 25C, 65%). Temperature compensation is performed internally to improve the reliability of data. The LDDS75 can be applied to scenarios such as horizontal distance measurement, liquid level measurement, object proximity and presence detection, automatic control etc. Great for keeping an eye on your rain water tanks.

*** Please note that items purchased from the store only include e-mail support. The configuration and installation is the users’ responsibility. If you require a higher level of support please contact sales for a quote on premium services.

$125- +GST
Availability: In stock
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The LDDS01 is based on the LSN50 platform, a long range LoRaWAN node that provides spread spectrum communication and high interference immunity whilst minimising power consumption. Its IP68 waterproof design makes it suitable for outdoor use and it’s powered by a 4000mA Li/SOCl2 non-rechargeable battery. Due to its low power operation, users can expect years of operation with a moderate logging rate. 

The Ultrasonic distance sensor comes pre-fitted on the LDDS01 and by default, the data record containing the battery voltage and the object distance (in mm) is sent every 20 minutes.

The operating parameters and many other settings on the LSN50 can be modified via AT commands on the serial port interface, but an FT232RL USB-TTL converter is required for this task (not supplied).  The communications port can also be used to upload new firmware via the built-in bootloader.  Some settings can also be changed via the server, like the transmit interval, operating mode, confirmation mode and the reset command.

When used with Telemetry2U, the distance between the sensor and the top of the water or product is reported in millimetres, but you can calibrate or scale this to litres, percentage, or any other unit of your choosing on Telemetry2U’s IoT Platform. You can see you water level in real-time on your Smartphone or PC as well as set up alerts when the level drops to a point of concern.  You can read more on how the LDDS01 Ultrasonic distance meter can be used to detect the water level of your tank, pond, or dam here.



Choose the 12-Month Subscription with Telemetry2U



When you select a"12-month Platform Subscription", we take care of the initial setup for you. Your Dragino LoRaWAN with all be shipped with all necessary configurations for seamless integration into Telemetry2U's IoT platform. All you'll need to do is register your account with Telemetry2U and add and your device to your account - it's that easy.

IoT Platform Features

Refer to our Quick Guide to help get started - you'll be up an running in no time!

Attribute name Attribute value
  • STM32L072CZT6 MCU
  • SX1276/78 LoRa Wireless Modem
  • Pre-load with ISP bootloader
  • 18 x Digital I/Os
  • 2 x 12bit ADC; 1 x 12bit DAC
  • MCU wake up by UART or Interrupt
  • LoRa™ Modem
  • Preamble detection
  • Baud rate configurable
  • LoRaWAN 1.0.2 Specification
  • Software base on STM32Cube HAL drivers
  • Open source hardware / software
  • Available Band:433/868/915/920 Mhz
  • IP68 Waterproof Enclosure
  • Ultra Low Power consumption
  • AT Commands to setup parameters
  • 4000mAh Battery for Long term use 
  • Monitor rain water tank levels
  • Monitor an object
  • Security
  • Measure distances
  • Detection

Power Consumption:

  • STOP Mode: 2.7μA @ 3.3v
  • RX Mode: 7.2mA
  • TX Mode: 125mA@ 20dbm 



  • Li/SOCI2 unchargable battery
  • Capacity: 4000mAh
  • Self Discharge: <1% / Year @ 25°C
  • Max continuously current: 130mA
  • Max boost current: 2A, 1 second
Package contents
  • 1 x LDDS01 module
  • 1 x External RF antenna 
  • Untrasonic sensor (fitted)
Dimensions and weight
  • Device wize: 130 x 50 x 45,m
  • Device weight: 150g
  • Package size: 140 x 80 x 50mm
  • Package weight: 180g

User Manual

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