GPS category


Today I made some modifications to this is a new project for a GPS to FM radio tracking device for rockets i.e. the V2. The initial design lacked the antenna impedance matching circuit which caused problems with the end amplifier. Also I increased the possible choices of frequencies, see the table further down. Now instead of soldering and de-soldering tiny resistors, the frequency and the transmitting modes are selected via a DIP switch.



Based on my first GPS data logger  I made a new version which is even smaller than the initial design and should be able to fit in any rocket, RC model etc. The new GPS data logger uses micro-SD card and 3.7v LIPO battery as power source. The board was also optimized and the new size is 20mm x 27mm – less than a standard SD card as you can see on the picture to the right.


Collecting GPS Data Using GPS Module With Windows IoT

Bardaan A published a guide on showing full instructions for developing a Windows IoT application that receives and extracts essential GPS data from a connected serial GPS module.

To follow this guide, you have to use Raspberry Pi 3 model B with Andoer NEO-6M GPS module, and also have Microsoft Visual Studio 2015 installed on your computer.

Application Interface
Application Interface

The Raspberry Pi 3 model B is a $35 single board computer with the size of a credit card. It is an improved version of Raspberry Pi 2 Model B and it features a 1.2 GHz 64-bit quad-core CPU,1GB RAM, integrated Wireless LAN, and Bluetooth 4.1 supporting Bluetooth Low Energy (BLE). The main board contains 4 USB ports, 40 I/O pins, HDMI port, Ethernet port, 3.5mm audio jack, and microSD card slot.

Raspberry Pi 3 model B
Raspberry Pi 3 model B

Andoer NEO-6M is a standalone GPS receiver module that implements the NEO-6M position engine developed by u-blox. It supports UART, USB, DDC (I2C compliant) and SPI interfaces and has low power consumption with high performance capabilities. NEO-6M’s strength point is that one of the received NMEA sentences is the GPGGA sentence, Global Positioning System Fix Data, which provides essential fix data.

Andoer NEO-6M GPS Module
Andoer NEO-6M GPS Module

The received GPGGA sentence will be send by Raspberry Pi to the application which processes it and extracts the essential information such as time, geographic coordinates, and altitude, and eventually displays them on a GUI with the connection status .

The GPS receiver must be connected to the Raspberry Pi as shown in the figure:


The source code with the detailed tutorial can be reached here.

DIY Altimeter using a NEO UBLOX GPS module and a Color OLED

In this video is going to build a DIY Altimeter using the UBLOX NEO-6M GPS module along with a color OLED display with the SSD1331 driver.

About a year ago, I built some GPS projects using this GPS shield. This shield is great but unfortunately it is no longer available for sale. Also its size is big so it is not ideal for smaller projects. So, while searching on I discovered this tiny GPS module. It costs around $16 and was kind enough to send me a sample unit in order to test it

DIY Altimeter using a NEO UBLOX GPS module and a Color OLED – [Link]

SubPos: a WiFi Positioning Solution for Places GPS Can’t Reach


SubPos Positioning System – A “dataless” Wi-Fi positioning system that can be used anywhere GPS can’t.

SubPos is an indoor positioning system that can be used in various environments such as metro lines, shopping malls, carparks, art galleries or even conference centers; essentially anywhere GPS doesn’t penetrate. It could also be integrated into an array of IoT enabled devices, from access points to Wi-Fi enabled light-bulbs.

When the world’s lifeforms are forced into subterranean dwellings due to nuclear fallout, evolution into lizard people or warming of the Earth, we will require a simple method for determining our position underground. In our current age, we are still working out the intricacies associated with determining our location in areas where GPS cannot reach

SubPos: a WiFi Positioning Solution for Places GPS Can’t Reach – [Link]

Review & Teardown of a cheap GPS Jammer


phasenoise has posted his teardown of a cheap GPS Jammer. This GPS jammer generates a 1575.42 Mhz interference to prevent your GPS unit from receiving correct positioning signals.

Generally, “jammers” — which are also commonly called signal blockers, GPS jammers, cell phone jammers, wifi jammers, etc. are radio frequency transmitters that are designed to block, jam, or otherwise interfere with radio communications.

Review & Teardown of a cheap GPS Jammer – [Link]

FeatherHAB (Balloon Tracker) Firmware & Hardware Source Released


Ethan Zonca has released the firmware and hardware of FeatherHAB. FeatherHAB is a small and inexpensive ballon GPS tracker.

FeatherHAB is a lightweight, small, and inexpensive balloon tracker. It tracks the location of a balloon with GPS and broadcasts the balloon’s position to the APRS network on 144.390MHz. The tracker is built around a Ublox MAX8 GPS module and a custom RF transmitter designed with the Silicon Labs Si446x transceiver IC. Power is supplied by a single-cell Lithium battery, which runs through a tiny buck-boost converter to power the system. The total weight comes in at about 2 grams without a battery.

FeatherHAB (Balloon Tracker) Firmware & Hardware Source Released – [Link]

Simple Arduino SD-Card GPS/NMEA Datalogger


KF5OBS @ shows us how to build a minimalistic GPS datalogger. The GPS logger is based on the Arduino platform and stores raw NMEA sentences from pretty much any GPS module to a SD card.

For a project I needed to log GPS information. I had various GPS modules and plenty of Arduinos laying around the lab. At first I intended for the Arduino to capture data from the GPS module, process it and then store it onto a SD card. However, I discarded that idea in favor of more flexibility and now use the arduino merely as pass-thru device for the raw GPS data.

Simple Arduino SD-Card GPS/NMEA Datalogger – [Link]

Portable GPS Data Logger

glg2 has build a portable GPS logger based on ATMega328 mcu:

I have built a GPS Logger and it works very well to trace the drove route for two years. By the way, the navigation solution computed by GPS receiver itself has an excellent accuracy without DGPS because an intentional offset added by US goverment has been stopped several years ago. The position error seems to be some meters under clear sky. It is a suffcient accuracy to trace the movement of walk. However that GPS logger was designed for only car use so that I re-designed a portable one.

Portable GPS Data Logger – [Link]

Teensy GPS Logger redesigned in smaller version


The last and final design, the Teensy and GPS is directly powered from 3.7v li-on batt. Arduino code and pcb layout (ARES) available.

Teensy GPS Logger redesigned in smaller version – [Link]