Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates [Version 3]

The Adafruit Ultimate GPS Breakout (Version 3) is a high-performance GPS module built around the MTK3339 chipset. With 66 channels, -165 dBm tracking sensitivity, and up to 10 Hz position updates, it delivers accurate and responsive location data for a wide range of projects.

Version 3 introduces external antenna support via a u.FL connector and a Pulse-Per-Second (PPS) output. The module automatically detects when an active antenna is connected and switches over from the built-in ceramic patch antenna. A built-in datalogging feature lets you log GPS data to internal FLASH memory — even while your microcontroller sleeps.

Key Features

• 66-Channel Receiver – Tracks up to 22 satellites with -165 dBm sensitivity
• 10 Hz Updates – Up to 10 position updates per second for high-speed tracking
• Ultra-Low Power – Only 20 mA current draw during navigation
• 5V Friendly – Built-in 3.3V regulator accepts 3.3–5V DC input with 5V-safe logic levels
• Dual Antenna Support – Internal ceramic patch antenna plus u.FL connector for an external active GPS antenna (auto-switching)
• Built-in Datalogging – Logs time, date, longitude, latitude, and altitude every 15 seconds to internal FLASH (approx. 16 hours of storage)
• PPS Output – Pulse-Per-Second signal output on GPS fix
• RTC Battery Backup – Footprint for CR1220 coin cell holder enables warm starts
• ENABLE Pin – Turn the module on/off via any microcontroller pin or switch
• Fix Status LED – Blinks at 1 Hz while searching, once every 15 seconds when fix is acquired
• Breadboard Friendly – Standard 0.1" header spacing with two mounting holes

Ideal For

• GPS tracking and datalogging projects
• Drone and robotics navigation
• Outdoor and vehicle location systems
• Time-synchronisation applications using PPS output
• Low-power portable GPS devices

Package Contents

• 1× Adafruit Ultimate GPS Breakout v3 (fully assembled and tested)
• 1× 0.1" header strip (for soldering)
• 1× CR1220 coin cell holder (battery not included)

Resources

• Adafruit Ultimate GPS Learning Guide – Wiring, datalogging, example code for CircuitPython & Arduino