The Atomic DTU LoRaWAN Base is a compact, programmable unit for low-power, long-range IoT communication. Based on the STM32WLE5CC chip, it supports LoRaWAN Class A, B, and C modes and comes in US915, EU868, and CN470 variants to meet regional frequency standards.

Each module supports both LoRaWAN and LoRa P2P modes, allowing for deployment either through a gateway or direct device-to-device communication. The unit communicates via UART using AT commands and includes an RS485 interface for wired industrial connections. A high-sensitivity rubber-duck antenna provides extended signal coverage in complex environments.

The Atomic DTU LoRaWAN-US915 supports the 902–928 MHz band for the United States and other US915-standard regions. It is optimized for compatibility with North American LoRaWAN networks such as TTN and ChirpStack.

Atomic DTU LoRaWAN Base – US915
(click image to enlarge)

The Atomic DTU LoRaWAN-CN470 is targeted at China and regions using the 470–510 MHz band. This version supports the CN470 LoRaWAN profile and is compatible with platforms including Tencent Cloud and Actility.

Atomic DTU LoRaWAN Base – CN470
(click image to enlarge)

Lastly, the Atomic DTU LoRaWAN-EU868 is designed for Europe and related regions, operating in the 868–870 MHz range. It adheres to EU868 LoRaWAN specifications and supports integration with commonly used platforms.

Specifications for the Atomic DTU LoRaWAN:

• LoRa SoC:
  • STM32WLE5 (256 KB Flash, 64 KB RAM)
• Protocol Support:
  • LoRaWAN 1.0.3 (Class A, B, C)
• Communication Modes:
  • LoRaWAN, LoRa P2P
• LoRaWAN Activation:
  • OTAA, ABP
• RS485 Interface:
  • SP3485EN
• UART Interface:
  • Default baud rate of 115200, AT command controlled
• Antenna:
  • 0.5 dB high-performance stick antenna, SMA male
• Power:
  • Standby: ~168–178 µA @ 9–12 V
  • Active (500 kbps): ~50–51 mA
  • Active (125 kbps): ~50–103 mA
• Operating Temperature:
  • 0–40 °C
• Mechanical:
  • 65.3 × 28.7 × 24.0 mm
  • 20.0 g

Physically, the DTU features a compact enclosure with a 35 mm DIN rail slot for installation in industrial panels or distribution boxes. It also includes LEGO-compatible mounting holes for added flexibility. Typical applications include smart agriculture, industrial monitoring, and environmental sensing.

Like most M5Stack products, the modules support development environments such as UiFlow1, UiFlow2, and the Arduino IDE.

Atomic DTU LoRaWAN Base – EU868
(click image to enlarge)

Further Information

Each unit includes the DTU module, stick antenna, and HT3.96‑4P wiring terminal. All models are priced at $22.90 and are available from the M5Stack shop.