This GPS receiver module kit is mostly SMD (pre-assembled), and includes a high sensitivity active antenna with 2m coax and SMA connectors, and a USB to Serial converter. It has three onboard LEDs for visual status indication, 3.3V regulator and power supply filtering, and 5V logic level conversion. It's easy to build and directly compatible with all QRP Labs kits.

Click!
Shop order
$23

UPDATE 19-May-2021: The QLG2 firmware development, testing and flashing is now complete. We are now shipping QLG2. There are 400+ pending orders so please be patient while we get these all shipped out. 

UPDATE 28-APR-2021: The QLG2 boards are now here at QRP Labs; we now have to finalize the firmware, documentation, flashing and testing. Please monitor this page for updates when we start shipping.

UPDATE: QLG2 manufacturing has taken longer than the original estimate, due to a number of supplier and production problems, most notably due to the global semiconductor chip shortage it was very hard to find the necessary microcontrollers. Currently our best estimate of shipment date is now end-April 2021. 

NOTE: QLG2 is currently in manufacturing; you may order it but shipping will be estimated end-March 2021. Information and photographs below are preliminary. 

The highly popular QLG1 GPS module had to be retired in February 2021 due to supply problems. This QLG2 module is an improved GPS receiver module kit that supports all the great features of QLG1 and additionally provides several upgrades and new features. QLG2: QRP Labs GNSS module Mk2


Features:

  • Supply voltage range 3.3 to 6V.
  • Board 80 x 37mm (Same as Ultimate3S, VFO and Clock kits).
  • Multi GNSS satellite constellation receiver supports the following systems GPS (US), Galileo (Europe), GLONASS (Russia) and Beidou (Chinese) - giving a faster more accurate position fix.
  • Supplied with included active antenna, approx 2m coax and SMA connectors.
  • Onboard LEDs for status indication: Red (Power), Yellow (Serial data) and Green (PPS).
  • 2.8 to 5V logic level conversion to provide 5V serial data for full compatibility with all QRP Labs kits.
  • SMD assembly already undertaken by factory facility - only SMA connector, and optional USB B, pin headers to solder.
  • Serial to USB converter, using onboard USB B connector, for convenient interface to PC software if required - no drivers required. Jumpers select either the GPS serial data, or your own externally connected serial data, for example you could use this as a USB to Serial data converter for CAT control of QCX, QCX+ and QCX-mini transceivers.
  • Can optionally be connected to a standard 1602 LCD, in the same style as the Ultimate3S, VFO and Clock kits, to GPS date, time and satellite information using onboard microcontroller. 
  • Space provided for optional ultra-capacitor for faster hot-start
  • All modules will be fully tested before shipment. 

Documentation

Manual for firmware 1_00/1_00a/1_00b
Manual for the E108-GN01 GNSS receiver module
Manual for the GK9501 chip command set (Chinese language; GK9501 is the chipset used in the E108-GN01 module)


Firmware

Please refer to the manual for the firmware update procedure, which is very easy and does not require any special hardware, software, drivers etc. It requires only a PC and a USB cable. Click the file in the first column of the table below, to download the firmware file of interest. Note that firmware files are encrypted and can only be used on the QRP Labs QLG2 board. 

Firmware version history:

Version Date Contents
1_00b 21-May-2021 - Bug fix: minor cosmetic issue, superfluous '2' character on LCD when optional LCD used.
1_00a 19-May-2021 - First release firmware for QLG2 (note 1_00 and 1_00a are the same)

Testing

All QLG2 kit modules and active antennas have been thoroughly tested by QRP Labs prior to shipment. The testing includes:

  • Install QFU Bootloader program via ST flash tools (STM32CubeProgrammer).
  • Use USB connection and Host PC to install the application firmware program (USB to Serial Converter and LCD display driver).
  • Test E108-GN01 module using the lab GNSS antenna which is the same model as supplied in the QLG2 kit.
  • Ensure time-to-first-fix (TTFF) is under 1 minute
  • Check correct operation of Serial data and 1pps signals
  • Check application firmware was correctly installed and microcontroller is running properly, by connecting a Terminal Emulator via USB and observing the NMEA serial data.

The testing is done using a custom-designed PCB and test jig with 10 pogo-pins that connect to the GNSS receiver module's RF input, the USB interface, and programming interface. 


Photographs

The QLG2 can be connected optionally to a standard 1602 LCD module such as used in other QRP Labs kits; the LCD will show UT time and GPS information (refer to manual). The LCD is not provided with the QLG2 kit.