DFM-09 Modification to GPS-Mouse.
DFM-09 Details: https://www.gruan.org/instruments/radiosondes/sonde-models/graw-dfm-09/
Telit Jupiter JN3 Details: https://www.telit.com/m2m-iot-products/positioning-timing-modules/positioning-gps-jupiter-n3
Remove Batteries, White cable on the left, Sensors and 400MHz transmit antenna on the right from the power button.
And solder TTL-USB converter on 4 pins right from JN3 GPS module:
1: GND –
Build together ->
Place on a site with some good view.
Connect with USB cable to computer.
Select COM Port (most probaly Prolific driver is needed on Windows) start GPS application and choose 19200 baud.
DFM-09 works in NMEA 19200 Baud mode.
Sync time for Satelitte’s with NMEA Time, drive arround town or smth ;)
USB-TTL Converter can be found on Ali/Ebay.
Thanks fly out to Andreas6 and PE2BZ.