STMicroelectronics Releases New LoRa™ Kit for Wireless IoT Developers
New RF Expansion Board includes the SX1272 LoRa Transceiver and
plugs directly into the STM32L073 Nucleo Board
STMicroelectronics has introduced a low-cost development kit that leverages the
STM32 microcontroller ecosystem for prototyping Internet-of-Things (IoT) devices
with LoRa™ Wireless Low-Power Wide Area Network (LPWAN) connectivity.
The P-NUCLEO-LRWAN1 kit combines the ultra-low-power STM32L073 Nucleo microcontroller board
with an RF expansion board based on the proven SX1272 LoRa transceiver from Semtech.
The STM32L073 MCU, with its energy-efficient ARM® Cortex®-M0+ core and
proprietary ultra-low-power features, provides an ideal host for devices such as utility meters,
alarm systems, positioning devices, trackers, and remote sensors.
Users can further extend functionality by adding extra expansion boards,
such as the X-NUCLEO-IKS01A1 sensor board for motion, humidity and temperature sensing.
LoRa enables long-range communication with several advantages over conventional cellular connections, including lower power and cost. Versatile features include multiple communication modes, accurate indoor and outdoor location awareness, and native AES-128 security.
The new kit contains everything needed to build bi-directional end devices that comply with LoRaWAN™ version 1.0.1 and support class A and class C protocols. Devices can be activated using Over-The-Air Activation (OTAA) or Activation-By-Personalization (ABP). An application for LoRaWAN certification tests is included in the kit, and the I-CUBE-LRWAN LoRaWAN stack is available and posted at www.st.com/i-cube-lrwan.
Access to the STM32 ecosystem provides rich development resources, including STM32Cube tools and software packages containing sample code and Hardware Abstraction Layers (HALs). These allow porting to any of the almost 700 STM32 MCU variants that cover a wide range of performance, power, packages, and price points. Developers are also free to use familiar IDEs and ARM mbed™ online tools.
The low purchase price of the P-NUCLEO-LRWAN1 kit allows a wide variety of engineers including independent designers, universities, and hobbyists to enjoy a high-end LoRa development experience.
Key Features of the FDA801
- 115dB Signal to Noise Ratio (SNR); 110dB dynamic range
- Simplified digital input eliminates external DAC (Digital to Analog Converter) and external decoupling capacitor, thereby avoiding potential DC-offset problems
- More than 40% power saving compared to standard class-D amplifiers
- Digital Impedance Meter (DIM, in FDA801B) automatically recognizes magnitude and phase of the connected speaker and communicates it by digital bus (I2C)
- Internal 24-bit DAC conversion and very low noise in line-driver and amplifier modes ensure superior audio performance
- On-demand advanced diagnostics allows each channel to independently perform AC or DC diagnostics with configurable parameters
- Ability to drive loads down to 1 ohm gives designers complete flexibility to specify preferred speakers
The STMicroelectronics website address is www.st.com.
[Reprinted with kind permission from STMicroelectronics - Release Date 15th September, 2016]