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STM32L0 Discovery kit LoRa, Sigfox, low-power wireless

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Parameter NameParameter Value
Core ProductSTM32L072CZ
ECCN US3A991.a.2
Packing TypeNot Applicable
RoHs compliantEcopack1
Package NameCARD

The B-L072Z-LRWAN1 LoRa®/Sigfox™ Discovery kit is a development tool to learn and develop solutions based on LoRa®, Sigfox™, and FSK/OOK technologies. This Discovery kit features the all-in-one CMWX1ZZABZ-091 open module by Murata. The module is powered by an STM32L072CZ microcontroller and SX1276 transceiver. The transceiver features the LoRa® long-range modem, providing ultra-long-range spread-spectrum communication and high interference immunity, minimizing current consumption. Since CMWX1ZZABZ-091 is an open module, the user has access to all STM32L072CZ peripherals such as ADC, 16-bit timer, LP-UART, I2C, SPI, and USB 2.0 FS (supporting BCD and LPM).

The B-L072Z-LRWAN1 Discovery kit includes an ST-LINK/V2-1 embedded debug tool interface, LEDs, push-buttons, antenna, Arduino™ Uno V3 connectors and USB OTG connector in Micro-B format.

The LoRaWAN™ stack supports Class A, Class B, and Class C. It is available in the I-CUBE-LRWAN firmware package. Several examples, including an AT-command stack, are available to help users set up a complete LoRaWAN™ node.

The Sigfox™ stack is RC1, RC2, RC3c, and RC4 compliant. It is available in the X-CUBE-SFOX Expansion Package. Several examples, including an AT-command modem, are also available to help users set up a complete Sigfox™ node.

Key features
  • CMWX1ZZABZ-091 LoRa®/Sigfox™ module (Murata)
    • Embedded ultra-low-power STM32L072CZ MCU, based on Arm® Cortex®-M0+ core, with 192 Kbytes of Flash memory, 20 Kbytes of RAM, 20 Kbytes of EEPROM
    • Frequency range: 860 MHz - 930 MHz
    • USB 2.0 FS
    • 4-channel,12-bit ADC, 2 × DAC
    • 6-bit timers, LP-UART, I2C and SPI
    • Embedded SX1276 transceiver
    • LoRa®, FSK, GFSK, MSK, GMSK, and OOK modulations (+ Sigfox™ compatibility)
    • +14 dBm or +20 dBm selectable output power
    • 157 dB maximum link budget
    • Programmable bit rate up to 300 kbit/s
    • High sensitivity: down to -137 dBm
    • Bullet-proof front end: IIP3 = -12.5 dBm
    • 89 dB blocking immunity
    • Low Rx current of 10 mA, 200 nA register retention
    • Fully integrated synthesizer with a resolution of 61 Hz
    • Built-in bit synchronizer for clock recovery
    • Sync word recognition
    • Preamble detection
    • 127 dB+ dynamic range RSSI
    • LoRaWAN™ Class A certified
  • SMA and U.FL RF interface connectors
  • Including 50-ohm SMA RF antenna
  • 7 LEDs:
    • 4 general-purpose LEDs
    • 5 V power LED
    • ST-LINK-communication LED
    • Fault-power LED
  • 1 user and 1 reset push-buttons
  • On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port, and debug port
  • Arduino™ Uno V3 connectors
  • Board power supply through the USB bus or external VIN/3.3 V supply voltage or batteries
  • 3 × AAA-type battery holder for standalone operation
  • Support of a wide choice of Integrated Development Environments (IDEs) including IAR™, Keil®, GCC-based IDEs, Arm® Mbed™