Datasheet

This board can calculate and predict orbits automatically using the ephemeris data (up
to 3 days) stored in internal flash memory, so the HAT can fix position quickly even
at indoor signal levels with low power consumption. With AlwaysLocate™
technology, the Lora/GPS HAT can adaptively adjust the on/off time to achieve
balance between positioning accuracy and power consumption according to the
environmental and motion conditions. The GPS also supports automatic antenna
switching function. It can achieve the switching between internal patch antenna and
external active antenna. Moreover, it keeps positioning during the switching process.
Features

Frequency Band: 868 MHZ

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
Specifications
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, LoRa™ 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.