GPS (U-blox NEO-M8N GPS/GNSS Receiver)

• A high performance Global Positioning System \ Global Navigation Satellite System receiver module for precise positioning & navigation.
• Supports multiple satellite systems:
  • GPS (USA)
  • GLONASS (Russia)
  • Galileo (Europe)
  • BeiDou (China)
• Works on the L1 frequency band (1575.42 MHz).

GPS GPIO Connection

GPS GPIO	Function	RPi GPIO Connection
VCC (3.3V \ 5V)	Power	Pin 1 (3.3V) \ Pin 2 \ 4 (5V)
GND	Ground	Pin 6 \ 9 (GND)
TXD	Transmit	Pin 10 (GPIO15, RXD)
RXD	Receive	Pin 8 (GPIO14, TXD)

Features

• High sensitivity → works in weak signal env.
• Fast Time-To-First-Fix (TTFF) → acquires satellites quickly (cold start: ~26s, hot start: ~1s).
• Update rate : up to 10 Hz (10 position updates per second).
• Accuracy:
  • Horizontal position: ~2.5 m (without correction).
  • Timing accuracy: ~30 ns with PPS output.
• PPS (Pulse Per Second) pin → useful for time synchronization.

Installation

sudo raspi-config

• Interface Options -> Enable (I2C & SPI)

sudo reboot

sudo apt install gpsd gpsd-clients python-gps

sudo cat /dev/serial0

sudo gpsmon /dev/serial0

• If Error