M5Stack LoRaWAN Unit US915 (STM32WLE5) with Antenna

M5Stack LoRaWAN US915 Unit for Long-Range IoT Nodes

The M5Stack LoRaWAN US915 Unit adds long-range wireless communication to remote sensors and embedded controllers. Built around STM32WLE5, it supports the US915 902–928MHz band, LoRaWAN 1.0.3, Class A, B, and C operation, OTAA and ABP activation, plus direct LoRa P2P links.

The host connects through UART at a default 115200 baud rate and configures the radio with AT commands. This keeps application logic on the main controller while the unit handles LoRaWAN joining, network communication, and P2P operation.

Confirm US915 Compatibility Before Deployment

Use this version only where the gateway, network server, and local radio regulations support a compatible US915 channel plan. It is not a substitute for EU868 or CN470 hardware. A regional mismatch can appear as failed joins, missing uplinks, or unreliable coverage even when credentials and application code are correct.

LoRaWAN Network or Direct P2P

Choose LoRaWAN mode when distributed nodes report through a compatible gateway and network server. Choose P2P when two devices need a direct local link without a gateway. The unit supports both workflows, which makes it practical for gateway-based telemetry and device-to-device prototypes.

Class A, B, and C Power Profiles

Class A suits periodic low-power nodes with limited receive windows. Class B adds scheduled receive opportunities. Class C keeps receive windows available more continuously for responsive downlinks at higher power use. Select the class around reporting interval, downlink latency, and battery budget.

Plan Range and Power from Real Conditions

The product specification lists P2P distances up to 2300m at 125Kbps and 1300m at 500Kbps under stated test conditions. Actual range depends on antenna placement, terrain, buildings, interference, data rate, installation height, and link budget. Sleep current is specified at about 28.61µA at 5V; complete battery calculations must also include the host controller, sensors, wake cycle, and transmit duty.

Technical setup details are available in the M5Stack LoRaWAN US915 documentation.