LoRa GPS HAT es una expansión para Raspberry PI que agrega funciones de LoRA, LoRaWAN y GPS a la Raspberry PI.

Está basando en el transceptor SX1276/SX1278.

Cuenta con el GPS L80 (basado en MTK MT3339), que se conecta a la Raspberry vía puerto serial.

La versión que mantenemos en stock y que corresponde a esta publicación es para la banda de frecuencia de los 915Mhz (LoRa GPS HAT-915).

Características:

• Frequency Band: 868 MHZ/433 MHZ/915 MHZ(Pre-configure in factory)
• Low power consumption
• Compatible with Raspberry Pi 2 Model B/Raspberry Pi 3.
• LoRa™ Modem
• FSK, GFSK, MSK, GMSK, LoRa™and OOK modulation
• Preamble detection
• Baud rate configurable
• Built-in temperature sensor and low battery indicator
• Excellent blocking immunity
• Automatic RF Sense and CAD with ultra-fast AFC
• Support DGPS, SBAS(WAAS/EGNOS/MSAS/GAGAN)
• GPS automatic switching between internal patch antenna and external active antenna
• PPS VS. NMEA can be used in time service
• Support SDK command
• Built-in LNA for better sensitivity
• EASY™, advanced AGPS technology without external memory
• AlwaysLocate™, an intelligent controller of periodic mode
• GPS FLP mode, about 50% power consumption of normal mode
• GPS support short circuit protection and antenna detection

Especificaciones:

Lora Spec:

• 168 dB maximum link budget.
• +20 dBm - 100 mW constant RF output vs.
• +14 dBm high efficiency PA.
• Programmable bit rate up to 300 kbps.
• High sensitivity: down to -148 dBm.
• Bullet-proof front end: IIP3 = -12.5 dBm.
• Excellent blocking immunity.
• Low RX current of 10.3 mA, 200 nA register retention.
• Fully integrated synthesizer with a resolution of 61 Hz.
• FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
• Built-in bit synchronizer for clock recovery.
• Preamble detection.
• 127 dB Dynamic Range RSSI.
• Automatic RF Sense and CAD with ultra-fast AFC.
• Packet engine up to 256 bytes with CRC.
• Built-in temperature sensor and low battery indicator.

GPS Spec:

• Power Acquisition:25mA,Power Tracking:20mA.
• Compliant with GPS, SBAS.
• Programmable bit rate up to 300 kbps.
• Serial Interfaces UART: Adjustable 4800~115200 bps,Default: 9600bps.
• Update rate:1Hz (Default), up to10Hz.
• Protocols:NMEA 0183,PMTK.
• Horizontal Position Accuracy:Autonomous <2.5 m CEP.
• [email protected] with EASY™:Cold Start <15s,Warm Start <5s,Hot start <1s;[email protected]
• without EASY™:Cold Start <35s,Warm Start <30s,Hot Start <1s.
• Timing Accuracy:1PPS out 10ns，Reacquisition Time <1s.
• Velocity Accuracy Without aid <0.1m/s,Acceleration Accuracy Without aid 0.1m/s².
• Sensitivity Acquisition -148dBm，Tracking -165dBm，Reacquisition -160dBm.
• Dynamic Performance Altitude Max.18000m，Maximum Velocity Max.515m/s，Maximum Acceleration 4G.
• L1 Band Receiver(1575.42MHz) Channel 22 (Tracking) /66 (Acquisition).

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