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

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  • Adafruit Ultimate GPS Breakout 66 channel w/10 Hz updates Version 3
    New! Version 3 comes with the latest module which has external antenna support and Pulse-Per-Second output.
    Adafruit has designed a range of GPS products over the years, but none that satisfied their every desire - that's why they designed this little GPS breakout board. Adafruit believes this is the UltimateGPS module, and rightly named so. It's got everything you want and more:
    • -165 dBm sensitivity, 10 Hz updates, 66 channels
    • 5V friendly design and only 20mA current draw
    • Breadboard friendly + two mounting holes
    • RTC battery-compatible
    • Built-in data logging
    • PPS output on fix
    • >25Km altitude
    • Internal patch antenna + u.FL connector for external active antenna
    • Fix status LED
    The breakout is built around the MTK3339 chipset, a no-nonsense, high-quality GPS module that can track up to 22 satellites on 66 channels, has an excellent high-sensitivity receiver (-165 dB tracking!), and a built-in antenna. It can do up to 10 location updates a second for high speed, high sensitivity logging or tracking. Power usage is incredibly low, only 20 mA during navigation.

    Best of all, Adafruit added all the extra goodies you could ever want: a ultra-low dropout 3.3V regulator so you can power it with 3.3-5VDC in, 5V level safe inputs, ENABLE pin so you can turn off the module using any microcontroller pin or switch, a footprint for optional CR1220 coin cell to keep the RTC running and allow warm starts and a tiny bright red LED. The LED blinks at about 1Hz while it's searching for satellites and blinks once every 15 seconds when a fix is found to conserve power. If you want to have a LED on all the time, They also provide the FIX signal out on a pin so you can put an external LED on.

    Two features that really stand out about version 3 MTK3339-based module is the external antenna functionality and the built-in data-logging capability. The module has a standard ceramic patch antenna that gives it -165 dB sensitivity, but when you want to have a bigger antenna, you can snap on any 3V active GPS antenna via the uFL connector. The module will automatically detect the active antenna and switch over!

    The other cool feature of the new MTK3339-based module (which Adafruit have tested with great success) is the built-in data logging ability. Since there is a microcontroller inside the module, with some empty FLASH memory, the newest firmware now allows sending commands to do internal logging to that FLASH. The only thing is that you do need to have a microcontroller send the "Start Logging" command. However, after that message is sent, the microcontroller can go to sleep and does not need to wake up to talk to the GPS anymore to reduce power consumption. The time, date, longitude, latitude, and height is logged every 15 seconds and only when there is a fix. The internal FLASH can store about 16 hours of data, it will automatically append data so you don't have to worry about accidentally losing data if power is lost. It is not possible to change what is logged and how often, as it's hard coded into the module but we found that this arrangement covers many of the most common GPS data logging requirements.

    Adafruit has tested this version of the Ultimate GPS in a high-altitude balloon, and it kept fix up to 27km!

    Adafruit has a nice fancy library for GPS usage, with background parsing and can set and query the built-in GPS logging capability (called LOCUS). A full tutorial is also available, which has tonnes of information about the module, how to use the data logger and more
     
    Technical Specifications
    • Satellites: 22 tracking, 66 searching
    • Patch Antenna Size: 15mm x 15mm x 4mm
    • Update rate: 1 to 10 Hz
    • Position Accuracy: 1.8 meters
    • Velocity Accuracy: 0.1 meters/s
    • Warm/cold start: 34 seconds
    • Acquisition sensitivity: -145 dBm
    • Tracking sensitivity: -165 dBm
    • Maximum Altitude for PA6H: tested at 27,000 Meters
    • Maximum Velocity: 515m/s
    • Vin range: 3.0-5.5VDC
    • MTK3339 Operating current: 25mA tracking, 20 mA current draw during navigation
    • Output: NMEA 0183, 9600 baud default
    • DGPS/WAAS/EGNOS supported
    • FCC E911 compliance and AGPS support (Offline mode : EPO valid up to 14 days )
    • Up to 210 PRN channels
    • Jammer detection and reduction
    • Multipath detection and compensation
    • Firmware version 5153
    Breakout board details:
    • Weight (not including coin cell or holder): 8.5g
    • Dimensions (not including coin cell or holder): 25.5mm x 35mm x 6.5mm / 1.0" x 1.35" x 0.25"

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