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doc:appunti:hardware:gf22_gps_tracker

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GF22 Mini GPS Tracker with GPRS

Purchased on AliExpress for about 18 € in July 2026, it is totally crap.

  • Does not work with a generic SIM
  • Does not respond to SMS commands
    • Cannot request GPS position via SMS
    • Cannot set the APN for GPRS connection
    • Cannot set the internet server for receiving tracking data
  • Does not have the microphone
  • Does not have the SD card slot

There appear to be many versions of this GPS tracker on the market, all based on the same architecture, but with significant variations in the assembled modules (microphone, SD card slot, etc.).

The most significant issue, however, is the ability to program the device, which typically requires sending appropriate commands via SMS. This allows, for example, to set the APN for internet access, configure the IP address of the server to which tracking information is sent, and so on. If the manufacturer hasn't provided these features, you'll have to hope the firmware recognizes the SIM card's carrier, and you'll be forced to rely on the vendor's tracking portal.

There are currently no known methods for altering the factory-installed firmware.

The GF-22 GPS Traker disassembled

WiFi module and battery of the GF-22 GPS Traker

It just doesn't work!

My example just doesn't work! I put into a SIM card from the Italian Ho-mobile operator (including GPRS/G3/G4 plan and SMS). To be able to connect the internet using the GPRS networ, the device should include the APNs of the major telco operators, but you cannot know what is in the list. If the device does not connect the network it tunts OFF the blue LED, as you can see in this photo:

Commands supported by some other similar devices

domain#45.55.84.20#5010#
Domain set succsess

Default passowrd: 123456 used where? FIXME

SMS commands:

SERVER#your.ip.or.domain#port#
domain#your.ip.or.domain#port#
SERVER,0,your.ip.or.domain,port,0#
SERVER,1,45.55.84.20,5010,0#
-- apn,password,apn_name,apn_user,apn_password#
apn,123456,internet,username,password#
APN#internet.provider#username#password#
-- Get Current Location:
WHERE#
DW#
-- Check Device Status:
STATUS#
-- Replies with the IMEI, APN, IP, and tracking intervals.
PARAM#
-- Enable Vibration Alarm
SENALM,ON,1#
666#ON#
-- Power Off:
POFF#
-- Factory Reset
RESET#
SYSRST#
-- Callback: the tracker automatically calls your phone so you can listen to the surroundings:
222
-- Starts a 10-minute audio recording to the device's memory
111
-- Bind admin number
000#+393334567890#
-- Set APN
pw,123456,apn,web.ho-mobile.it,,,#
apn,web.ho-mobile.it,,,#
apn,web.ho-mobile.it,,22210#

Web References

doc/appunti/hardware/gf22_gps_tracker.1783674643.txt.gz · Last modified: by niccolo