I bought 2 MTK 3329 GPS to work with binary protocal. I am able to change the baude rate, read the NMEA format or binary format, etc. I bought one long time ago with the 1.3 firware version anf other recently with the 1.6 version. The the problem I have on both versions and only in the binary format is a big variation in the data (latitude, longitude and altitude) that some times gives more that 50 meters of displacement. It is constantly varying. I have been use several baudrates with the binary format but the problem continue.
In the NMEA format the data is stable. Is there any one experienced the same problem? Does any one can help and give some clues on what may cause the problem?
Thanks in advance,
Try the firmware AXN1.51_2722_3329_384.1151100.5.bin from http://code.google.com/p/i2c-gps-nav/downloads/detail?name=MTK-firm.... It also uses DIY Drones binary protocol. I got stable readings at 57K Baud and 10Hz update rate.
But from what i understand you loose SBAS and WAAS at 10 Hz readout.