RAK3172-T WisDuo LoRaWAN Module — STM32WLE5 with TCXO & MHF Connector (EU868)

A complete LoRa/LoRaWAN transceiver in a 15 × 15.5 mm stamp module. The RAK3172-T is a low-power, long-range wireless module based on the STM32WLE5CC system-on-chip. This variant features a TCXO (±2.5 ppm) for reliable operation down to -40°C and an MHF (IPEX) antenna connector for easy integration with external antennas.

Pre-loaded with RAKwireless RUI3 firmware. Use it as a standalone LoRa device with custom firmware, or as a LoRa modem controlled by an external microcontroller via AT commands over UART. Supports LoRaWAN Class A, B, and C as well as LoRa P2P mode.

Why This Variant?

The RAK3172 comes in multiple variants. This is the RAK3172-T with MHF connector, TCXO, 800 MHz band — the right choice if you need:

• TCXO (±2.5 ppm) — temperature-compensated crystal for reliable frequency stability in extreme temperatures (-40°C to +85°C). Essential for outdoor, industrial, and cold-climate deployments where a standard oscillator would drift
• MHF (IPEX) antenna connector — snap-on connector for external antennas. No RF trace design needed on your PCB
• 800 MHz band (EU868) — configured for European LoRaWAN operation (also supports RU864, IN865)

Key Features

• STM32WLE5CC SoC — ARM Cortex-M4 @ 48 MHz, 256 KB Flash, 64 KB RAM, integrated sub-GHz radio
• LoRaWAN 1.0.3 — Class A, B, and C support. Compatible with TTN, ChirpStack, Helium, and other network servers
• LoRa P2P mode — direct point-to-point communication without LoRaWAN infrastructure
• Ultra-low power — 1.69 µA sleep current. Designed for battery-powered field devices with multi-year lifetimes
• RUI3 firmware — RAKwireless Unified Interface V3. Develop custom firmware with RUI3 APIs, or use AT commands via UART as a modem
• Compact form factor — 15 × 15.5 × 3.5 mm, 32-pin stamp pad for PCB SMT mounting
• Rich I/O — UART, I2C, SPI, ADC, GPIO accessible via stamp pads
• Supply voltage — 2.0–3.6V
• CE certified — ready for integration into EU-market products

Ideal For

• OEM product development — embed the RAK3172-T in your own PCB design for LoRaWAN-connected products
• Smart agriculture — soil sensors, weather stations, irrigation control in remote fields
• Industrial IoT — asset tracking, environmental monitoring, predictive maintenance
• Smart city infrastructure — parking sensors, waste bin monitoring, street lighting control
• Cold-climate deployments — the TCXO variant is essential for Scandinavian, Alpine, or other environments where temperatures regularly drop below -20°C
• Custom LoRa P2P networks — build your own long-range sensor network without LoRaWAN infrastructure

Standalone vs Modem Mode

Standalone mode: Write custom firmware using RUI3 APIs directly on the STM32WLE5. The module runs your application code — no external MCU needed. Ideal for simple sensor nodes.

Modem mode: Connect the RAK3172-T to an external host MCU (Arduino, STM32, ESP32, Raspberry Pi) via UART. Control it with AT commands or binary protocol. The external MCU handles application logic while the RAK3172-T handles all LoRa/LoRaWAN communication.

Specs

• Chipset: STM32WLE5CC (ARM Cortex-M4, 48 MHz)
• Memory: 256 KB Flash, 64 KB RAM
• LoRa transceiver: Integrated sub-GHz radio (Semtech SX126x compatible)
• Frequency: 800 MHz band (EU868 / RU864 / IN865)
• Oscillator: TCXO ±2.5 ppm
• Antenna: MHF (IPEX) connector
• LoRaWAN: Class A, B, C — LoRaWAN 1.0.3
• LoRa P2P: Supported
• Bandwidth: 7.8 kHz to 500 kHz
• Supply voltage: 2.0–3.6V
• Sleep current: 1.69 µA
• Temperature range: -40°C to +85°C
• I/O: UART, I2C, SPI, ADC, GPIO
• Form factor: 15 × 15.5 × 3.5 mm stamp module, 32-pin SMT pad
• Firmware: RUI3 (AT command + custom firmware support)
• Certification: CE / UKCA
• Product code: RAK3172-T

What's in the Box

• 1 × RAK3172-T LoRaWAN Module (TCXO, MHF connector, 800 MHz)

Note: minimum order quantity may apply. This is a bare stamp module for PCB integration — no enclosure, antenna, or base board included. For a ready-to-use development platform, see the WisBlock Starter Kit.

Documentation

Full datasheet, quick start guide, reference schematics, firmware downloads, and Arduino example code are available at the RAKwireless Documentation Center.