Rtone has experience in developping an entire product (hardware, software and industrialization) around the STM32 as the main processor.
The engineering complexity comes from having many different communication channels (Sigfox, WiFi, Bluetooth Low Energy, 2G/4G) and peripherals (Microphones, speakers, LED, accelerometers, GNSS...) in a very small form-factor.
Example 1: DATI
A device for isolated workers that offers a worlwide emergency assistance service enabling the detection and transmission of alerts.
Example 2: In&motion
Connected airbag best equipped with embedded sensors for skiers, motobikers and horseriders.The IN&MOTION Airbag Vest is a self-inflating vest protecting the upper body in the event of a crash. The FIS-approved smart airbag measures skiers, moto and horse riders movement and detects unavoidable falls, inflating in less than 0.1 seconds to pad critical areas of the body including the spine, chest, abdomen, neck and hips before impact with the ground.
Example 3: Flowbird - Streetsmart terminal
A new generation of parking meters for the World leader in urban meter.
The parking meter is powered using a battery and solar panels. Thus, it requires an ultra low-energy policy. The STM32L051 is used as as co-processor to wake the MPU as fast as possible after certain events (tap on touch-screen, coins insertion, etc.)