Micro GPS

[J Mack]

I?ve been waiting for parts for both my boat builds so I thought I would work on a GPS for checking speed while I wait.

The GPS weighs 7.7 grams and saves the log file to the micro SD card.

I used a small drone GPS. "Beitian BN-220 Dual GPS Glonass Module with Flash Passive Antenna + GPS for Arduino Aircraft F3 CC3D Flight Control"

Then used a small data logger to put information on the SD card. "ATmega328 Openlog Serial Data Logger Open Source Naze32 F3 Blackbox Data Logger] Support Micro SD DIY Electronics module"
I used Aliexpress but they can be purchased in many places.

Data logger.

https://www.aliexpress.com/item/1005...432c4c4diCr7SD

You want Bundle: BN-220 and module so you can program the GPS up to 10HZ. It will come by default 1HZ from the factory.

https://www.aliexpress.com/item/3291...432c4c4diCr7SD

You will need to cut the supplied wire harness and solder wires like the photos.



Drivers here, https://www.u-blox.com/en/product-re...ory/driver-221

https://www.u-blox.com/en/product/u-center

http://docs.diymalls.com/How-to-set-...GPS-Module.pdf

http://docs.diymalls.com/How-to-chan...GPS-Module.pdf

http://docs.diymalls.com/

Username: diymall

Password: diymall

For power, from 3.3 volts to 5.5 volts, I use the receiver for power, but you can steal the power from the balance cable on Lipo or add a small battery as well.
You need a FAT32 formatted microSD card, I am using a 1G card but any size should work.



I used the GPS viewer for testing but will need to spend more time learning to know if it will work for me..
https://www.gpsvisualizer.com/
Select CREATE PROFILE in the top menu
Then click on Select CHOOSE FILE in the middle right and select your gps log file on the SD card. Note that your log files are all the same date, but it's easy to see from the filename which are the latest. Your log files contain date and time information in the file, which will be retrieved for example. google earth.
Then on the left set the following:
X axis: choose distance or time Y axis: speed https://www.gpsvisualizer.com/profile_input

I have tried several different programs to read the log file directly from the GPS SD card without using the internet. GPXSee seems to be a good program. http://www.gpxsee.org

This is a screenshot from GPXSee showing the map and speed.
LOG2.jpg