Description The Unit LoRaWAN-US915 is a LoRaWAN communication module designed for long-distance, low-power IoT deployments on the US915 band. Built around the STM32WLE5 LoRa solution, the Unit LoRaWAN-US915 integrates a LoRaWAN protocol stack and supports Class A, Class B, and Class C operation for different downlink and power-consumption requirements. With UART AT-command control, OTAA and ABP activation, LoRa point-to-point communication, and a high-sensitivity 2.3dBi rubber duck antenna, the Unit LoRaWAN-US915 can work as a gateway collection node or support direct device-to-device communication when a gateway is not required. The Unit LoRaWAN-US915 is suited for smart agriculture, industrial monitoring, environmental monitoring nodes, and long-range sensor networks in the United States and other compatible regions. Notice: The US915 version is designed for the United States and other regions using the 902-928 MHz US915 band. Confirm local LoRaWAN frequency regulations, channel plan, and gateway support before deployment. Features Unit LoRaWAN-US915 communication module based on the STM32WLE5 LoRa solution. Compliant with LoRaWAN 1.0.3 protocol and supports Class A, Class B, and Class C operation. Supports the US915 frequency band from 902-928 MHz for compatible regional deployments. Supports LoRa P2P point-to-point communication as well as LoRaWAN network communication. OTAA and ABP activation modes for flexible network joining. UART serial interface with default 115200 baud rate and AT-command control. High-sensitivity rubber duck antenna with 50-ohm impedance, 2.3dBi gain, 195mm total length, and SMA male connector. Low-power design, LEGO-hole compatible housing, and development support for UiFlow1, UiFlow2, and Arduino IDE. Specifications LoRa Solution STM32WLE5 @ 256 KB Flash, 64 KB RAM Supported Frequency US915 (902-928 MHz) Protocol Support LoRaWAN 1.0.3 protocol, Class A, Class B, Class C Receiver Sensitivity -137 dBm LoRaWAN Activation Modes OTAA, ABP Communication Modes LoRaWAN and point-to-point (P2P) Communication Range (P2P) 2300m at 125Kbps, 1300m at 500Kbps Interface Type UART serial port @ default baud rate 115200, supports AT commands Antenna Type High-performance rubber duck antenna, 50-ohm impedance @ 2.3dBi, total length 195mm, SMA male connector Standby Power Consumption Idle state: DC 5V/7.23mA; sleep state: DC 5V/28.61uA Operating Current at 500Kbps Data reception: DC 5V/9.20mA; data transmission: DC 5V/11.36mA Operating Current at 125Kbps Data reception: DC 5V/8.43mA; data transmission: DC 5V/117.16mA Operating Temperature 0 to 40 C Product Size 71.4 x 24.0 x 8.0mm Product Weight 11.9g Package Size 243.0 x 93.0 x 9.0mm Gross Weight 37.0g Applications Smart agriculture nodes that need long-range sensor reporting through the Unit LoRaWAN-US915. Industrial monitoring deployments where low-power US915 LoRaWAN communication is required. Environmental monitoring node deployment with gateway-based collection or P2P data exchange. Remote metering, data acquisition, and field sensor projects using UART AT-command control. Product List 1 Unit LoRaWAN-US915 1 HY2.0-4P Grove Cable (20cm) 1 Rubber Duck Antenna (@2.3dBi, total length 195mm, SMA male connector) Other Content The Unit LoRaWAN-US915 uses PORT.C for UART communication: black is GND, red is 5V, yellow is UART_RX, and white is UART_TX. The UART interface and AT-command manual are useful for host-controller integration, automated provisioning, and application firmware development. LoRaWAN Class A provides the lowest downlink real-time performance and the lowest power consumption for periodic upload nodes. Class B provides medium downlink timing and medium power consumption for scheduled control devices. Class C provides the highest downlink real-time performance and the highest power consumption for real-time control, including industrial automation. Compared with the older LoRaWAN 915MHz unit, the Unit LoRaWAN-US915 uses STM32WLE5, supports LoRaWAN 1.0.3 with Class A/B/C, provides up to 22 dBm transmit power, and supports both LoRaWAN and P2P communication modes. Resources Unit LoRaWAN-US915 product documentation RAK3172 module certification information Unit LoRaWAN-US915 schematic PDF Unit LoRaWAN-US915 schematic image Unit LoRaWAN-US915 model size drawing Unit LoRaWAN-US915 datasheet PDF Unit LoRaWAN-US915 Arduino library on GitHub Unit LoRaWAN-US915 AT command manual PDF Unit LoRaWAN-US915 product introduction video file UiFlow 1 web IDE for M5Stack development UiFlow 2 web IDE for M5Stack development Arduino IDE setup documentation for M5Stack M5Burner guide for M5Stack tools OpenELAB LoRaWAN units features and selection guide FAQ Where is the Unit LoRaWAN-US915 intended to be used? The Unit LoRaWAN-US915 is intended for the United States and other regions using the 902-928 MHz US915 band. Check local frequency regulations, channel plan, and gateway compatibility before deployment. Can the module work without a LoRaWAN gateway? Yes. In addition to LoRaWAN network communication, the module supports LoRa P2P point-to-point communication for direct device-to-device scenarios. How is the Unit LoRaWAN-US915 controlled by a host device? The module uses a UART serial interface with AT-command control, which makes it practical for M5Stack controllers and other host systems that can communicate over UART. What is included in the package? The package includes the Unit LoRaWAN-US915 module, a 20cm HY2.0-4P Grove cable, and a 2.3dBi rubber duck antenna with SMA male connector.
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