Možná jste někde zaznamenali novinku, nový Discovery board určený pro IoT aplikace s podporou LoRa. Discovery board je osazen modulem, který obsahuje STM32L072 a SX1276 LoRa od Semtech.
Pokud ano, můžete tento článek přeskočit a pokračovat níže k fotografiím.
Ne? Pak čtěte dále.
Takže… i STMicroelectronics jde s dobou. Discovery board, jak jiný discovery boardy, obsahuje programátor a debugger ST-LINK/V2-1.
Celý modul je označen jako CMWX1ZZABZ-091 a výrobce je firma Murata.
LoRaWAN™ je certifikován pro třídy A a C. Je dostupný i firmware balík s názvem CUBE-LRWAN.
Další vlastnosti
– CMWX1ZZABZ-091 LoRa® 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
– USB 2.0 FS
– 4-channel,12-bit ADC, 2xDAC
– 6-bit timers, LP-UART, I2 C and SPI
– Embedded SX1276 transceiver LoRa® , FSK, GFSK, MSK, GMSK and OOK modulations
+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 VIN /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)
Další informace http://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html
