Atomic DTU LoRaWAN Base - US915 (STM32WLE5CC)

Description Atom DTU LoRaWAN-US915 is a LoRaWAN programmable data transmission unit (DTU) designed for the 915 MHz frequency band, specifically tailored for the US915 band, suitable for the United States and other regions using the US915 band. This module employs the STM32WLE5 solution, supporting long‑range communication with low power consumption and high sensitivity. The module features a built‑in LoRaWAN protocol stack, supporting Class A, Class B and Class C operation modes for easy connection to various LoRaWAN server platforms such as TTN, ChirpStack, Actility, Tencent Cloud, etc.; it also supports LoRa® point‑to‑point (P2P) communication mode and uses a UART communication interface (controlled via the AT command set) for flexible configuration, and integrates an RS485 communication interface to provide reliable wired connectivity for industrial field devices. The product uses a high‑performance rubber‑duck antenna, with an optimized design to deliver more stable signal coverage and longer communication range, suitable for a variety of complex environments. In LoRaWAN mode, the module can act as a node to connect to a gateway for data collection and management; in P2P mode, it can achieve direct device‑to‑device communication without a gateway. Structurally, the module features a standard 35 mm DIN rail slot at its base, allowing direct installation on industrial rails for quick deployment and maintenance in cabinets or distribution boxes. It is 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 902 – 928 MHz band Supports LoRa® P2P (point‑to‑point) communication LoRaWAN Activation Modes: OTAA, ABP Serial communication (AT commands) RS485 communication High‑sensitivity stick antenna Low power consumption LEGO‑compatible mounting holes DIN rail mounting design Development Platforms: UiFlow1 UiFlow2 Arduino IDE Includes 1 × Atom DTU LoRaWAN‑US915 1 × Stick antenna (@0.5 dBi total length 195 mm, SMA male) 1 × HT3.96‑4P wiring terminal Applications Smart agriculture Industrial monitoring Environmental monitoring node deployment Specifications Specification Parameter LoRa Solution STM32WLE5 @256 KB Flash, 64 KB RAM Supported Band US915 (902 – 928 MHz) Protocol Support LoRaWAN® 1.0.3 (Class A, Class B, Class C) Receive Sensitivity –137 dBm LoRaWAN Activation Modes Over‑The‑Air Activation (OTAA), Activation By Personalization (ABP) Communication Modes LoRaWAN and LoRa® P2P (point‑to‑point) RS485 SP3485EN Interface UART serial @default baud rate 115200, supports AT commands Antenna High‑performance stick antenna, 50 Ω impedance @0.5 dBi, total length 195 mm, SMA male Standby Power Consumption (RS485 interface power) DC 9V @ 167.98 µADC 12V @ 178.09µA Operating Current (RS485 interface power) (500 kbps) Data reception: DC 9V @ 50.32mAData transmission: DC 9V @ 51.56mA(125 kbps) Data reception: DC 9V @ 49.94mAData transmission: DC 9V @ 102.79mA Operating Temperature 0 – 40 °C Product Size 65.3 × 28.7 × 24.0mm Product Weight 20.0 g Package Size 175.0 × 40.0 × 30.0mm Gross Weight 56.9 g LEARN AND DOCUMENTS DOCUMENTS