Hi,
if anyone have this product help me please 
I have only one problem, the GPS speed on the OSD dont works and distance to home are incorrect. Please help me
can anyone explain what are the correct modification on the CODE to have a better Drotek I2CGPS (MT3339 FW AXN2.10_5156_3339_1152.1101000.10) ? I find some issues but possible that no one has ever noticed? I noticed the problem because i have the mobidrone osd and GPS speed not works.
Thanks
Video for explain:
Gps speed wrong and coordinates when GPS make the fix oscillate
Gpd speed in multiwii gui 2.1
youtube.com/watch?v=xj_zZj5j-aA&feature=plcp
Gps Tool 1.7.1
youtube.com/watch?v=FNRbxnYBTzM&feature=plcp
Edit 2-09-2012 the judgment day
SOLVED thanks to CarlonB. There is a calculatuion error in the I2Cgps code by EOSbandi! With this new strings was calculated the km/h on the OSD. All thanks to CarlonB because have find the problem, i have only tested
For wrong distance to home i put the wareck code always in I2Cgps and now works correctly.
After
//************* GPGSA FRAME parsing
case GPRMC_FRAME:
switch(param)
{
case 7: i2c_dataset.ground_speed = (atof(string)*0.5144444)*10; //convert to m/s*100
Now
//************* GPGSA FRAME parsing
case GPRMC_FRAME:
switch(param)
{
case 7: i2c_dataset.ground_speed = (atof(string)/0.5144444)*1000*100/3600; //convert to m/s*100
Video: