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Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates [Version 3]
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$62.65
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The Adafruit Ultimate GPS Breakout (Version 3) is a high-performance GPS module built around the MTK3339 chipset. With 66 channels, -165 dBm tracking sensiti...
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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)
Tip: Most GPS antennas use SMA connectors — you may need a uFL-to-SMA adapter cable for external antenna use.
Note: A CR1220 coin cell battery is required separately for the RTC backup feature.
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.
- Flash memory
- Flash memory is non-volatile memory that retains stored data even when power is removed, and can be erased and rewritten in blocks. It lets data such as firmware, settings or saved records persist across power cycles.
- 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.
- SMA
- SMA is a small threaded coaxial (RF) connector widely used to attach antennas and other radio-frequency cables. A device with SMA antenna ports needs antennas or pigtails with matching SMA connectors, or a suitable adapter, to connect to them.
- 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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