Lora gteway设计介绍.pdf

LoRa End Node Design Support Semtech Support Semtech Confidential Sensor node demo for Asia 470MHz 868/915MHz 434MHz Semtech Confidential 3 Block Diagram Semtech Confidential 4 Lora module (LoraWAN) • SX1276 LoRa module-- Design by SMTC’s partner • High performance STM32 MCU-- powerful enough to support LoraMac • Small Size:22mm x 22mm • 4 Layers PCB, 24 pins SMT package • TXOP=20dBm @434MHz/470MHz • TXOP=14dBm @868MHz/915MHz • 32KHz external XTAL for low power consumption • Reserved SPI, UART, I²C, USB, and others GPIO Semtech Confidential 5 Block of Cherry module SPI 434/470MHz TX with 20dBm UART SWIM 434/470MHz RX I²C STM32L151C8U6 SPI SX1276 868/915MHz TX with 14dBm ADC GPIO 868/915MHz RX Semtech Confidential 6 Cherry Module Schematic Semtech Confidential 7 Sensor Node Schematic Semtech Confidential 8 Layout -- top layer 4 layers design T