Adafruit Ultimate GPS Module with USB

Adafruit Ultimate GPS Module with USB is built around the MTK3339 high-quality GPS module that tracks up to 22x satellites on 66x channels. This 5V module features built-in data logging, a low 20mA current draw during navigation, an internal patch antenna, and a u.FL connector for the external active antenna. A high-sensitivity receiver provides -165dB tracking with up to 10x location updates a second for high-speed, high-sensitivity logging or tracking.


  • Built around the MTK3339 chipset with:
    • 66-channels
    • -165dBm sensitivity
    • 10Hz updates
  • 5V design and low 20mA current draw
  • Breadboard friendly with 2x mounting holes
  • RTC battery-compatible
  • Built-in data logging
  • PPS output on fix
  • Internal patch antenna and u.FL connector for external active antenna
  • Fix status LED


  • Satellites
    • 22x tracking
    • 66x searching
  • 25.5mm x 35mm x 6.5mm breakout board size
  • 15mm2 x 4mm patch antenna size
  • 1Hz to 10Hz update rate
  • 1.8m position accuracy
  • 0.1m/s velocity accuracy
  • 34s warm/cold start time
  • -145dBm acquisition sensitivity
  • -165dBm tracking sensitivity
  • 515m/s maximum velocity
  • 3.0VDC to 5.5VDC range
  • Operating current
    • 25mA tracking
    • 20mA current draw during navigation
  • NMEA 0183, 9600 baud default output
  • DGPS/WAAS/EGNOS supported
  • FCC E911 compliance and AGPS support (offline mode: EPO valid up to 14 days)
  • Up to 210x PRN channels
  • Jammer detection and reduction
  • Multi-path detection and compensation


Published: 2019-07-31 | Updated: 2023-05-30