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Adafruit Ultimate GPS Breakout with GLONASS + GPS - PA1616D
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The Adafruit Ultimate GPS Breakout with GLONASS + GPS is an enhanced version of the popular Ultimate GPS, built around the MTK3333 chipset with PA1616D modul...
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The Adafruit Ultimate GPS Breakout with GLONASS + GPS is an enhanced version of the popular Ultimate GPS, built around the MTK3333 chipset with PA1616D module. It supports both GPS and GLONASS satellite networks, tracking up to 33 satellites on 99 channels for improved coverage and accuracy worldwide.
With -165 dBm tracking sensitivity, up to 10 Hz position updates, and only ~29 mA current draw during navigation, this breakout delivers excellent performance for demanding location projects. It includes external antenna support via a u.FL connector, built-in datalogging, PPS output, and RTC battery backup.
Key Features
- GPS + GLONASS Support – Dual constellation tracking for better coverage and faster fixes
- 99-Channel Receiver – Tracks up to 33 satellites with -165 dBm sensitivity
- 10 Hz Updates – Up to 10 position updates per second for high-speed tracking
- Low Power – Approximately 29 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 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 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/GLONASS tracking and datalogging projects
- Drone and robotics navigation
- Outdoor and vehicle location systems
- Applications requiring improved satellite coverage (e.g. urban canyons)
- Time-synchronisation applications using PPS output
Package Contents
- 1× Adafruit Ultimate GPS Breakout with GLONASS (fully assembled and tested)
- 1× CR1220 coin cell holder (battery not included)
Note: NMEA sentences will start with
$GN instead of $GP when both GPS and GLONASS are available. Antenna query commands differ from the classic MTK3339 version — check the datasheet for details.
Tip: Looking for just the module without the breakout board? Check out the Ultimate GPS Module PA1616D.
Resources
- Adafruit Ultimate GPS Learning Guide – Wiring, datalogging, example code for CircuitPython & Arduino
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V regulator
- A 3.3V regulator is a power circuit that provides a steady 3.3 volts for parts that need that supply voltage. On a breakout board, it can let the sensor run safely even when the connected microcontroller or power source uses a higher voltage.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- CircuitPython
- A beginner-friendly version of Python designed to run directly on microcontroller boards. If a product supports CircuitPython, you can often program it by copying code files onto the board rather than setting up a more complex toolchain.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- GLONASS
- Russia’s satellite navigation system. A receiver that can also use GLONASS has more satellites to choose from, which can improve positioning reliability when the sky view is partly blocked.
- GPS
- The US satellite navigation system used by GNSS receivers to calculate position and time. Support for GPS is important because it is widely available and often used together with other constellations for more reliable positioning.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- RTC
- A Real-Time Clock keeps track of time even when the main processor is asleep or powered down, usually with a small backup battery. It matters for data logging and tracking projects that need accurate timestamps.
- u.FL
- u.FL is a tiny snap-on antenna connector often used on compact wireless boards. A board with u.FL usually needs an external antenna, which matters if the product will be inside an enclosure or needs better antenna placement.
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