B-L072Z-LRWAN1  

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 an all-in-one open module CMWX1ZZABZ-091 (by Murata). The module is powered by an STM32L072CZ and an 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, user has access to all STM32L072 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 is certified class A and C compliant. It is available in theI-CUBE-LRWAN firmware package. Several examples, including an AT-command stack, are available to help users setting up a complete LoRaWAN^™ node.

The Sigfox™ stack is RCZ1, RCZ2, and RCZ4 certified. It is available in the X-CUBE-SFOX Expansion package. Several examples, including an AT-command modem, are also available to help users setting up a complete Sigfox™ node.

Key Features

• CMWX1ZZABZ-091 LoRa^®/Sigfox™ module (Murata)
  • Embedded ultra-low-power STM32L072CZ Series MCUs, 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, 2xDAC
  • 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
• SMA and U.FL RF interface connectors
• Including 50 ohm SMA RF antenna
• On-board ST-LINK/V2-1 supporting USB re-enumeration capability
• USB ST-LINK functions:
• Board power supply:
  • Through USB bus or external V_IN/3.3 V supply voltage or batteries
• 3xAAA-type-battery holder for standalone operation
• 7 LEDs:
  • 4 general-purpose LEDs
  • A 5 V-power LED
  • An ST-LINK-communication LED
  • A fault-power LED
• 2 push-buttons (user and reset)
• Arduino^™ Uno V3 connectors
• Arm^® Mbed^™ (see http://mbed.org)