Building a couple of these today for a PFSense user. I have been using same now for a few years.
Note this DIY was posted on the PFSense forum and Cocoontech forum.
This will only work with an RS-232 interface only and not a USB interface. PPS signal is from pin #1 (DCD) as show in picture.
Hardware (all purchased on Amazon)
1 - Neo ublox GPS module as pictured
2 - TTL - RS-232 module as pictured and modded with PPS signal wire
3 - power only USB cable as pictured
4 - external GPS SMA antenna
Software to modify and save firmware on GPS module
U-Center
GPS ==> TTL-RS232 wiring
Ground ==> Ground
TX ==> RX on TTL-RS232
RX ==> TX on TTL-RS232
VCC ==> VCC on TTL232
PPS ==> Pin #1 (DCD) on TTL232
Note that the UBlox U-Center application is a bit overwhelming. Just configure what is in the attached jpg.
Tested with and without GPS antenna to work fine. Need to point the device and / or Antenna to the SouthEast a bit.
Update: 31st of December, 2021
Folks at the PFSense helped me a bit relating to getting the GPS information (Longitude-Latitude and number of Satellites).
So in the configuration program you have to do this and save the configuration.
Note this DIY was posted on the PFSense forum and Cocoontech forum.
This will only work with an RS-232 interface only and not a USB interface. PPS signal is from pin #1 (DCD) as show in picture.
Hardware (all purchased on Amazon)
1 - Neo ublox GPS module as pictured
2 - TTL - RS-232 module as pictured and modded with PPS signal wire
3 - power only USB cable as pictured
4 - external GPS SMA antenna
Software to modify and save firmware on GPS module
U-Center
GPS ==> TTL-RS232 wiring
Ground ==> Ground
TX ==> RX on TTL-RS232
RX ==> TX on TTL-RS232
VCC ==> VCC on TTL232
PPS ==> Pin #1 (DCD) on TTL232
Note that the UBlox U-Center application is a bit overwhelming. Just configure what is in the attached jpg.
Tested with and without GPS antenna to work fine. Need to point the device and / or Antenna to the SouthEast a bit.
Update: 31st of December, 2021
Folks at the PFSense helped me a bit relating to getting the GPS information (Longitude-Latitude and number of Satellites).
So in the configuration program you have to do this and save the configuration.
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