LoRaWAN Core Module STM32WLE5 – RAKwireless RAK3372

The RAKwireless RAK3372 is a WisBlock Core module for LoRa® and LoRaWAN® applications, based on the STM32WLE5CC (also referenced as STM32WLE5CCU6 in the text). It is designed to plug into WisBlock Base Boards so you can expand a node by simply adding WisBlock sensor and I/O modules—ideal for fast prototyping and product development without designing your own RF + MCU hardware.

On the firmware side, the module is built around RUI3 (RAKwireless Unified Interface V3). Using RUI3 APIs, you can implement custom device behavior directly on the module. Alternatively, the RAK3372 can be deployed as a LoRa modem controlled by an external microcontroller or microprocessor via UART, using AT and Binary commands—a practical option when you want LoRaWAN connectivity in an existing host system.

For network operation, the text states compliance with LoRaWAN Class A, B, and C (LoRaWAN 1.0.4 mentioned) and easy connectivity to LoRaWAN platforms such as Kilo Cloud, The Things Network (TTN), ChirpStack, Chirp DePIN, and Helium. It also supports LoRa point-to-point (P2P) mode for quickly building a custom long-range LoRa network without a LoRaWAN backend. Power-focused designs benefit from the very low sleep current (both 1.69 µA and “< 2.0 µA” are stated) and the high output power option up to 22 dBm in PA boost mode.

Practical fit (from the provided text): Smart City, Smart Agriculture, and Smart Industry sensor nodes, long-range telemetry, and development/test setups where modular WisBlock expansion speeds iteration.

Integration note stated in the text: WB_IO3 (WisBlock IO Pin 3) is connected to PB12 of the RAK3172 module and internally tied via a 10 kΩ resistor; other WisBlock modules using this pin may conflict.