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M5Stack U184 LoRaWAN® Units with Antenna

M5Stack U184 LoRaWAN® Units with Antenna are communication modules based on LoRa® technology. The M5Stack U184 modules adopt the STM32WLE5 solution, supporting long-range communication with low power consumption and high sensitivity characteristics. The modules integrate the LoRaWAN protocol stack and support three operating modes: Class A, Class B, and Class C. U184 devices also support a point-to-point (P2P) communication mode and use a UART communication interface (controlled by the AT command set) for flexible configuration.

The M5Stack U184 units also feature a high-performance rubber antenna with an optimized antenna design that provides more stable signal coverage and longer communication distance, making it suitable for various complex environments. The modules can be used as data collection nodes to connect to a gateway for data collection and management or to enable direct communication between devices in scenarios where no gateway is needed. These devices are widely used in long-range, low-power IoT communication scenarios, such as smart agriculture, industrial monitoring, and environmental monitoring node deployments.

Features

  • Complies with LoRaWAN 1.0.3 protocol
  • Supports AS923, CN470, EU868, and US915 frequency bands (depending on model)
  • Supports LoRa Point-to-Point (P2P) communication
  • LoRaWAN OTAA and ABP activation modes 
  • Serial communication (AT commands)
  • Equipped with a high-sensitivity rubber stick or high-performance stub antenna
  • Low power consumption
  • Compatible with LEGO holes
  • Development platforms
    • UIFlow 1.0
    • UIFlow 2.0
    • Arduino IDE

Applications

  • Smart agriculture
  • Industrial monitoring
  • Environmental monitoring node deployment

Specifications

  • STM32WLE5 at 256KB flash, 64KB RAM LoRa solution
  • Supported bands
    • 902MHz to 928MHz for AS923
    • 470MHz to 510MHz for CN470
    • 868MHz to 870MHz for EU868
    • 902MHz to 928MHz for US915
  • LoRaWAN 1.0.3 protocol (Class A, Class B, and Class C)
  • High-performance antenna
    • Rubber stick type
      • 50Ω impedance at 2.3dBi, 195mm total length, SMA male connector for AS923
      • 50Ω impedance at 1.5dBi, 195mm total length, SMA inner pin for CN470
    • Stub type
      • 50Ω impedance at 2.8dBi, 195mm total length, SMA inner pin for EU868
      • 50Ω impedance at 2.3dBi, 195mm total length, SMA inner pin for US915
  • -137dBm receive sensitivity
  • 2300m (125Kbps) and 1300m (500Kbps) P2P communication range
  • UART serial interface type that supports AT commands
  • Standby current
    • 5VDC/7.23mA idle
    • 5VDC/28.61µA sleep
  • Operating current
    • 500Kbps data
      • 5VDC/9.20mA receive
      • 5VDC/11.36mA transmit
    • 125Kbps data
      • 5VDC/8.43mA receive
      • 5VDC/117.16mA transmit
  • 0°C to +40°C operating temperature range
  • 71.4mm x 24.0mm x 8.0mm size

Kit Contents

  • 1x Unit LoRaWAN-AS923
  • 1x HY2.0-4P cable (20cm)
  • 1x rubber stick or stub antenna (depending on model)

Videos

Dimensions

Mechanical Drawing - M5Stack U184 LoRaWAN® Units with Antenna

Resource

Published: 2025-01-21 | Updated: 2025-01-28