STM32 SoC connects smart devices to the IoT using LoRa

STM32 microcontroller IP and enhanced Semtech radio are integrated on a single chip, the STM32WLE5. STMicroelectronics claims that this is the first LoRa SoC available for connecting smart devices to the IoT using long-distance wireless connections.

The STM32WLE5 SoC lets product developers create devices such as remote environmental sensors, meters, trackers, and process controllers that help efficiently manage energy and resources, continues the company.

The STM32WLE5 has multiple combines the low-power STM32 microcontroller design with a LoRa-compliant radio in one single-die and easy-to-use device. It has multiple ST patents pending, namely for radio power management architecture, and ST’s LoRaWAN software for wireless network communications has passed all regional certifications for use worldwide.

The SoC is available in a 5.0 x 5.0mm UFBGA73 package. It is fully integrated into the STM32 ecosystem, including STM32Cube software support, as well as a LoRaWAN stack certified for all regions and available in source-code format.

The integrated radio is based on Semtech SX126x IP and engineered with dual high-power and low-power transmitter modes that cover the sub-1GHz unlicensed frequency range from 150 to 960MHz, ensuring compatibility with LoRa networks around the world and in all territories.

Sensitivity down to -148dBm and two embedded power amplifiers with up to 15dBm and up to 22dBm maximum transmit power are available in the same package to maximise RF range.

In addition to embedded LoRa modulation, the STM32WLE5 is also capable of (G)FSK, (G)MSK, and BPSK modulation, allowing alternative protocols including proprietary protocols. High RF performance with low power consumption ensures reliable wireless connectivity and which includes dynamic voltage scaling and ST’s adaptive real-time ART Accelerator for zero-wait execution from flash.

Flash options are 64, 128 and 256kbyte for a choice of optimal code and data storage density.

Users also benefit from the built-in cyber-security features of STM32L4 microcontrollers, including hardware public key accelerator (PKA), true random number generator (TRNG), sector protection against read/write operation (PCROP), and support for the latest cryptographic algorithms including RSA.

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