MultiWii

Can anyone tell me what Multiwii needs to see from the GPS module? What NEMA setup should be for the module?

Thanks

Looking at the code it appears to use only GGA and/or RMC, is this correct?

Yes, only GGA and RMC are used.

From EOSBandi's Wiki......
The GPS implementation in MultiWii (both I2c and serial) expect that your GPS receiver is
 set to 10Hz (or 5Hz) update rate
 communicates at 115200 baud speed
 and output GGA, GSA and RMC frames

Wiki:
http://code.google.com/p/i2c-gps-nav/do ... f&can=2&q=

BTW, Thank you EOSBandi for the Wiki. I printed it as a booklet and take it to the field with me.

The minimum requirement is FRAME_GGA frames.
We could do without RMC and GSA frames without any trade-of on performances.

Thanks all. I am unable to successfully flash the firmware on my MTK3339 based SKYLAB SKM53 module. I can change the setting with Mini GPS but they revert back to default (9600, 1Hz) after several hours. In the latest DEV, where would I send init strings to set it back to 115,200 10Hz?

brettwal wrote:Thanks all. I am unable to successfully flash the firmware on my MTK3339 based SKYLAB SKM53 module. I can change the setting with Mini GPS but they revert back to default (9600, 1Hz) after several hours. In the latest DEV, where would I send init strings to set it back to 115,200 10Hz?

My questien is nearly the same. I search a way to permanently write settings into the Meditek 3329. Have successfully flashed 10Hz / 115200 Baud firmware and my Kopter is flying ok for GPS PH or CH, but I want to set it permanently to 5Hz and using DGPS for more precise Position. In 10 Hz Mode no DGPS is possible.
I used MiniGPS or MtkDLut for changing settings in GPS Module, and this works, but setting is lost after several time and sets back to 10 Hz / 115200...

The question is:
- Is there a programm for a permanently setup ofthe GPS?
- is there a firmware for Mediatek 3329 that setups 5Hz / 38400 and DGPS on permanently (as the 10Hz / 115200 Firmware does)
- if not, we have to send a init String to get it to the desired setting at each start...at the moment I can't find a place in the Code where a initstring could be placed...

quadflyer8 wrote:

brettwal wrote:Thanks all. I am unable to successfully flash the firmware on my MTK3339 based SKYLAB SKM53 module. I can change the setting with Mini GPS but they revert back to default (9600, 1Hz) after several hours. In the latest DEV, where would I send init strings to set it back to 115,200 10Hz?

My questien is nearly the same. I search a way to permanently write settings into the Meditek 3329. Have successfully flashed 10Hz / 115200 Baud firmware and my Kopter is flying ok for GPS PH or CH, but I want to set it permanently to 5Hz and using DGPS for more precise Position. In 10 Hz Mode no DGPS is possible.
I used MiniGPS or MtkDLut for changing settings in GPS Module, and this works, but setting is lost after several time and sets back to 10 Hz / 115200...

The question is:
- Is there a programm for a permanently setup ofthe GPS?
- is there a firmware for Mediatek 3329 that setups 5Hz / 38400 and DGPS on permanently (as the 10Hz / 115200 Firmware does)
- if not, we have to send a init String to get it to the desired setting at each start...at the moment I can't find a place in the Code where a initstring could be placed...

I have several versions of FW for a 3329, not sure if DGPS is enabled or not but, you are welcome to try them. I cannot flash my unit, I always get a sync error.

brettwal wrote:I have several versions of FW for a 3329, not sure if DGPS is enabled or not but, you are welcome to try them. I cannot flash my unit, I always get a sync error.

thanks, surely I will try them, I will sent you a pm for that
in my other thread I have learned, that CTRL + ALR + S will permanently save setting into EEpromm, will check this, too.