Description Atom DTU LoRaWAN-EU868 is a programmable LoRaWAN data transmission unit for the EU868 frequency band. Built around the STM32WLE5 solution, it combines long-range wireless communication, low power consumption, high sensitivity, UART AT command control, and RS485 wired connectivity in an Atomic-series base form factor. The built-in LoRaWAN protocol stack supports Class A, Class B, and Class C operation modes, with OTAA and ABP activation for connecting to LoRaWAN server platforms such as TTN, ChirpStack, Actility, and Tencent Cloud. Atom DTU LoRaWAN-EU868 also supports LoRa P2P communication, allowing direct device-to-device data exchange without a gateway when a private point-to-point link is required. For field deployment, the base includes a high-sensitivity stick antenna, an HT3.96-4P wiring terminal, LEGO-compatible mounting holes, and a 35mm DIN-rail mounting slot. Atom DTU LoRaWAN-EU868 is suitable for smart agriculture, industrial monitoring, environmental monitoring nodes, and long-range low-power IoT data collection in regions that use the EU868 band. Features EU868 band support: designed for the EU868 band and 868 to 870MHz LoRaWAN deployments. STM32WLE5 LoRa solution: integrates 256KB flash and 64KB RAM for LoRaWAN DTU applications. LoRaWAN 1.0.3 protocol: supports Class A, Class B, Class C, OTAA, and ABP activation modes. Flexible communication: supports LoRaWAN mode, LoRa P2P mode, UART serial AT commands, and RS485 communication. Industrial installation: DIN-rail slot, LEGO-compatible mounting holes, wiring terminal, and stick antenna support cabinet or field-device deployment. Development support: the DTU base can be used with Arduino IDE, UiFlow1, and UiFlow2 workflows. Specifications LoRa solution STM32WLE5, 256KB flash, 64KB RAM Supported band EU868, 868 to 870MHz Protocol support LoRaWAN 1.0.3, Class A, Class B, Class C Receive sensitivity -137dBm Activation modes OTAA and ABP Communication modes LoRaWAN and LoRa P2P Serial interface UART serial, default baud rate 115200, AT command support RS485 SP3485EN Antenna High-performance stick antenna, 50 ohm impedance, 0.5dBi, 195mm total length Standby power consumption RS485 interface power: DC 9V at 167.98uA; DC 12V at 178.09uA Operating current 500kbps: DC 9V at 50.32mA reception, 51.56mA transmission; 125kbps: DC 9V at 49.94mA reception, 102.79mA transmission Operating temperature 0 to 40 C Product size 65.3 x 28.7 x 24.0mm Product weight 20.0g Package size 175.0 x 40.0 x 30.0mm Gross weight 56.9g Applications Smart agriculture sensor nodes that need long-range low-power LoRaWAN uplinks. Industrial monitoring systems combining RS485 field devices with wireless LoRaWAN backhaul. Environmental monitoring node deployment across EU868 regions. LoRa P2P links where the EU868 DTU communicates directly with another compatible node. Product List 1 x Atom DTU LoRaWAN-EU868 1 x Stick antenna (0.5 dBi, total length 195mm, SMA male) 1 x HT3.96-4P wiring terminal Other Content The device supports LoRaWAN network operation through OTAA or ABP and can also run LoRa P2P communication for direct links. The Arduino tutorial demonstrates LoRa P2P communication and LoRaWAN network connection using an Atom controller with the DTU base. For wiring, the documented pin map includes UART RX/TX, RS485 RX/TX, 5V, GND, and 3V3 connections. The HY2.0-4P Port.A mapping lists GND, 5V, G25 for Atom Lite, and G21 for Atom Lite. EU868 deployment should follow the local regional frequency plan. The documentation lists many supported countries and regions, including Germany, France, Italy, Spain, Netherlands, Poland, Portugal, Sweden, Switzerland, the United Kingdom, and other EU868-compatible regions. Resources Atom DTU LoRaWAN-EU868 product document Atom DTU LoRaWAN Series Arduino tutorial M5-LoRaWAN-RAK Arduino library Atom DTU LoRaWAN Series UiFlow2 documentation Atom DTU LoRaWAN AT command manual PDF Atom DTU LoRaWAN-EU868 schematic PDF RAK3172 module datasheet PDF RAK3172 module certification information TTN LoRaWAN introduction and device configuration documentation FAQ Which frequency band is this version for? This version is intended for EU868 deployments, with the product specification listing 868 to 870MHz band support. Does it support both LoRaWAN and direct LoRa communication? Yes. It supports LoRaWAN operation and LoRa P2P communication, so it can connect through a gateway or communicate directly with another compatible node. Which LoRaWAN activation modes are supported? The device supports OTAA and ABP activation modes for LoRaWAN network joining. Can it connect to wired industrial equipment? Yes. The base integrates RS485 communication in addition to UART serial AT command control.
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