Vallarta
Ultra-low power LPWAN System-on-Module based on the STM32WL SoC with integrated Semtech SX126x sub-GHz radio transceiver for long-range, low-power wide-area network connectivity.
Overview
The Vallarta is an ultra-low power LPWAN transmission module. It uses the STM32WL SoC — the world's first SoC to integrate a LoRa-compatible radio (Semtech SX126x) alongside an ARM Cortex-M4 MCU.
This enables long-range sub-GHz LPWAN connectivity with minimal external components, ideal for battery-powered IoT sensors deployed across kilometers.
Wireless Protocols
- Sub-GHz LPWAN — LoRa-compatible long-range communication
- Long-range communication — km-scale coverage
- Low data rate — Optimized for sensor telemetry
- Excellent building penetration — Sub-GHz propagation advantages
Key Features
- STM32WL SoC with integrated sub-GHz radio
- Semtech SX126x RF transceiver
- Ultra-low power for multi-year battery life
- Compact SOM form factor
- Long-range LPWAN connectivity
- Full STM32Cube development support
Development
Develop firmware using the comprehensive STM32Cube ecosystem from STMicroelectronics, including STM32CubeIDE, STM32CubeMX code generator, and the STM32WL firmware stack with certified LoRaWAN protocol implementations.
For rapid prototyping, pair with the Vallarta MKR evaluation board in Arduino MKR form factor.