STM32L162RET6TR is an ultra-low-power microcontroller from STMicroelectronics based on the ARM® Cortex®-M3 core, belonging to the STM32L1 series. Packaged in LQFP-64, it features 512 KB of Flash memory and 80 KB of RAM, operates over a wide voltage range (1.65 V to 3.6 V), and supports multiple low-power modes.

Thanks to its excellent energy efficiency, rich peripheral set, and high integration, the STM32L162RET6TR is widely used in the following application areas:

1. Portable and Battery-Powered Devices

• Smartwatches and fitness trackers
• Portable medical devices (e.g., glucose meters, heart rate monitors)
• Wireless remote controls and electronic shelf labels (E-Ink displays)
• Personal navigation devices (PNDs)

2. IoT End Nodes

• Wireless sensor networks (WSN)
• LoRa / NB-IoT / BLE end devices
• Smart home sensors (temperature/humidity, door/window, water leak detection, etc.)
• Asset trackers (leveraging low power consumption, RTC, and backup registers)

3. Industrial and Building Automation

• Smart electricity, water, and gas meters (supporting metering and remote reading)
• Industrial sensors and data acquisition modules
• Building control panels and HVAC controllers
• Security devices (e.g., low-power access control systems, alarms)

4. Consumer Electronics

• Electronic shelf labels (ESL)
• Educational electronics and smart toys
• Low-power human-machine interface (HMI) devices

5. Medical Electronics

• Wearable health monitoring devices
• Disposable or long-term implantable medical devices (requiring low power and reliability)
• Portable diagnostic equipment

Key Features Enabling These Applications:

• Ultra-low power consumption: as low as ~200 µA/MHz in active mode and ~1 µA in standby mode (with RTC enabled)
• Hardware encryption: AES hardware accelerator for security-sensitive applications
• High-precision analog peripherals: 12-bit ADC, comparators, and operational amplifiers—ideal for sensor signal conditioning
• Real-time clock (RTC) with calendar and alarm functions: suitable for scheduled wake-up and timestamping
• Rich communication interfaces: USART, SPI, I²C, USB, IrDA, etc., enabling easy connectivity to various modules

✅ Summary:
The STM32L162RET6TR is especially well-suited for embedded applications that demand low power consumption, extended battery life, and a balance of processing capability and peripheral integration. It is a popular choice for IoT edge nodes, smart metering solutions, and portable medical devices.