DTR сигнал не используется уже давно, тем более что что в версии с 4х строчным экраном его вообще нет.
Цитата:
"In the original version this pin 4 was the DTR connection to the computer, this is no longer used for that purpose and has been programmed in the four line LCD version to be a second enable pin."
Кстате, кто не хочет подключать трекер к компу для синхронизации времени, может подключить GPS к этому порту.
Нужен GPS с NMEA 4800 baud.
To use the GPS activate the “UP” button on the shack unit then turn the unit on. Hold the
button active for at least 1 second, at which point the button (switch) may be released and the
welcome screen will remain on the screen. If the GPS is already on and satellites are found
you will see the welcome screen change to a display of the UTC time while the second line
will display the latitude and longitude. This display will remain for three seconds before
changing to the normal tracking screen. No further readings are taken from the GPS and it
may now be turned off or disconnected. The Latitude and Longitude are saved to Eprom
memory but the time and date are lost if the power is removed.
Note that if the welcome screen seems to be locked on, it is probably because the satellites
are not yet acquired (the program tests for acquisition) or your GPS is not compatible.
The system was tested on my system with a Garmin GPS 12 and a Magellan GPS310.
Успехов.
