8738OT2 and GTRANS together
- Oct 2, 2009Greetings All,
I have just confirmed that when the GTRANS is connected to the OpenTracker2,
NMEA is available as an output. With this combination, KISS and NMEA can be
I was monitoring the output of the GTRANS with Hyper Terminal and I received
the following when I powered up the OT2:
Argent Data Systems GTRANS v1.2
I did run it longer but only included the first four sentences sent. I
previously did not know which sentences were sent. It sends GGA,RMC and GLL,
The GPS was ran in simulated mode since I am indoors. The next run will be
with my regular T2 system running and with a D7 using the GTRANS NMEA
output. I expect no surprises. I will also run the NMEA to a laptop at some
point for ExpertGPS to use. For the Xastir folks, can you use KISS and NMEA?
The modifications were straight forward, though, I should add, I work with
this kind of stuff at my day job. I have a very fine tipped, temperature
controlled Weller soldering station and a microscope. The GTRANS is using
0402 parts along with a QFN processor. Small!
The GTRANS needs 5V and ground for power. The are several locations to find
The input to translate was grabbed from OT2 U6-16 and connected to GTRANS
U2-48 through a 1K resistor.
The resistor was added because the processor on the GTRANS runs at 3.3 volts
and the output from the OT2 is at 5V. I have not checked yet whether the
GTRANS processor has 5V tolerant inputs.
U1-9 was lifted to avoid conflicts. There would be two outputs connected to
the same input otherwise.
I hope this is useful!
OT2 U6-16 = pin 16 of the processor (U6) in the OT2
GTRANS U2-48 = pin 48 of the processor (U2) in the GTRANS
- << Previous post in topic Next post in topic >>