Gravity: LoRaWAN Node Module (EU868)

SKU: DFR1115-868

The Gravity: LoRaWAN Node Module (EU868) is a dual-mode, long-distance wireless communication solution for outdoor IoT applications, designed for the EU868 frequency band with kilometer-range transmission capabilities and flexible configuration options for seamless integration into various IoT projects.

Overview of Gravity: LoRaWAN Node Module (EU868)
  • Docs
  • Tech Specs
  • Blog
  • 1. Example for LoRa Communication-Transmit-Receive Application

    This article offers a detailed guide on implementing LoRa communication using ESP32 and LoRaWAN node modules, covering hardware and software setup, wiring diagrams, sample code for data transmission between nodes, and achieving successful communication results.

    2. Example for LoRa Communication-One-to-Many Communication

    This article provides a detailed example of implementing LoRa's 'Single Transmit, Multiple Receive' communication mode, including hardware and software setup, wiring diagrams, and sample code for successful data transmission.

    3. Example for LoRa Communication-Two-to-One Communication

    This article explains a two-to-one communication setup using LoRa technology with FireBeetle ESP32 and LoRaWAN modules, including preparation, wiring, coding, and results.

    4. Example for LoRa Communication-Data Relay Application

    The article offers a comprehensive guide on implementing data relay in LoRa communication using three nodes A, B, and C to extend the communication range beyond direct data transmission.

    5. Example for LoRaWAN Communication-OTAA Network Joining

    This article demonstrates how to set up and join a LoRaWAN network using the OTAA method, featuring hardware preparation with FireBeetle 2 ESP32-E and Gravity LoRaWAN Node Module. It provides comprehensive wiring diagrams and sample Arduino code for sending and receiving data within the network.

    6. Example for LoRaWAN Communication-ABP Network Joining

    The article offers a detailed guide on setting up LoRaWAN communication through ABP Network Joining, covering hardware and software preparations, wiring, and sample Arduino codes for effective IoT data transmission.

    Reference

    This reference article offers a comprehensive overview of the API library for configuring LoRaWAN settings on Arduino-compatible devices, covering functions such as setting frequency, bandwidth, data rate, and more, alongside product compatibility details.

    Specification

    Basic Parameters

    Power Supply Voltage DC 3.3V~5V
    Communication Mode I2C/UART
    Power/Communication Interface PH2.0-4P
    Mounting Hole Diameter 3.0mm
    Mounting Hole Spacing 35mm
    Product Dimensions 42x62mm
    Net Weight 10g

    LoRa Parameters

    RF Chip SX1262
    Operating Frequency 868MHz
    Supported Regions Europe and other regions using the EU868 band
    Modulation Method LoRa modulation
    Spreading Factor 7~12
    Maximum Transmit Power +16dBm
    Receiver Sensitivity -137dBm (SF=12/BW=125kHz)

    Pinout

    DFR1115-868-pinout

    Name Full Name Function
    T/D UART_TX/I2C_SDA UART transmit pin (TX) / I2C data line (SDA)
    R/C UART_RX/I2C_SCL UART receive pin (RX) / I2C clock line (SCL)
    - DGND Digital ground, connects to the GND of the host controller
    + VCC PPower supply input, DC 3.3V~5V (must match the host system voltage level)
    PWR Power Red power indicator, remains on when power is supplied
    ACT Active Green status indicator:
    1. Blinks for 1 second when transmitting a network join request.
    2. Remains on for 5 seconds when the network join is successful.
    3. Blinks for 300ms during data transmission or reception.

    The DIP switch defaults to I2C mode and can switch between I2C and UART. Restart the module after switching.

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    Getting Started with LoRaWAN

    This article presents four simple steps to help you become familiar with LoRaWAN and decide how to apply it in your project. Discover the advantages of LoRaWAN, what it can be used for, how it works, and how to prepare for your first LoRaWAN project.

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    LoRa vs LoRaWAN

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    LoRaWAN Gateway Software

    Selecting the right LoRaWAN gateway software can be a challenge for IoT projects. Get informed on the 4 most popular platforms - ChirpStack Gateway OS, TTN Gateway Connector, Semtech UDP Packet Forwarder, and LoRa Basics™ Station - and learn which one suits your specific needs.

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    FAQ

    • Why does switching the DIP switch to change the communication mode not work?
      After switching the communication mode while the module is powered on, you need to power cycle (reboot) the module for the change to take effect.
    • What is the communication range of the module?

      EU868 Version

      Stable Communication Range:1.2 km (urban)/4 km (open area)

      Maximum Communication Range:1.4 km (urban)/4.4 km (open area)

      US915 Version

      Stable Communication Range:1.5 km (urban)/4.5 km (open area)

      Maximum Communication Range:2 km (urban)/4.7 km (open area)

      The above test data is for reference only. Communication range is significantly affected by environmental factors (such as traffic density, weather conditions, and base station interference). The actual range should be confirmed through real-world deployment.

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