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Description of product


B-L072Z-LRWAN1 STM32 LoRaWAN Discovery Board is a development tool to learn and develop solutions based on LoRa and/or FSK/OOK technologies. This tool features an all-in-one open module solution (by Murata) to address low-power wide-area networks (LPWAN) and support the LoRaWAN long-range wireless protocol.

The B-L072Z-LRWAN1 comes with certified embedded software (I-CUBE-LRWAN) to set up a complete LoRaWAN node. The I-CUBE-LRWAN is LoRaWAN class A certified and sustains class C.

The Discovery board features Arduino connectors for a sensor extension board, an integrated debugger (ST-Link V3), USB 2.0 FS device USB port, battery pack slot (backside), SMA connector, and 50ohm antenna.

Because the module is open, an external MCU to run applications is not needed. The stack can be hosted on the STM32L0 internal flash memory.

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