I am currently using the rainy days to setup my APM2.5. Now, I got a Mediatek MTK3329 GPS from flytron.com quite some while ago (used it with MultiWii via I2C at that time).
This GPS also provides serial interface.
I updated it with http://code.google.c...t/wiki/MediaTek
next i set with the GPS Config Tool 1.7.1 the refresh-rate to 10Hz.
verifying that with a terminal program such as Putty confirms, that coordinates are getting updated now with 10 per second which looks great.
Also verified to disconnect GPS from power, reconnect again and still the refresh rate is 10Hz.
Next, I connect the GPS to my APM2.5. I also get fix after some while. I just want to make sure, it really uses the higher refresh rate of 10 Hz.
However, when connecting to the APM2.5 CLI the coordinates I get there seem to be updated much slower. I would estimate approx. 3 Hz or so.
When I connect the GPS again to the GPSConfigTool the refresh rate seems to be reset back to 5Hz...
Any idea, how I can get APM2.5 to use 10Hz refresh rate and how to verify that properly?
thanks a lot,