MultiWii

warthox wrote:setting homepos during gyrocal is not better. in this case i would prefer setting homepos while arming.
an universal solution would be the use of an aux channel switch. so u can set homepos wherever and in which situation ever your copter is.

dr.tom wrote:P.S. someone here managed to push some binary data through 1 channel via atmel and trainer port, and decode it back at model side,
so it's possible to make as many switches as you want on a separate board attached to your TX, and with flip of a finger, you could activate all sort and mixes of functions.

rollinolin wrote:Hello all,
I bought a gps module from AREA52MOSFETS on the seeduino mega thread about a year ago.




I know nothing about it and was wondering if anyone here could help. I think i need a BOB for the GPS and i dont know where to get one and how to connect it to the seeduino mega? can anyone point me in the right direction?

thanks

wilco1967 wrote:

rollinolin wrote:Hello all,
I bought a gps module from AREA52MOSFETS on the seeduino mega thread about a year ago.




I know nothing about it and was wondering if anyone here could help. I think i need a BOB for the GPS and i dont know where to get one and how to connect it to the seeduino mega? can anyone point me in the right direction?

thanks

From the picture, it looks exactly like the GPS receiver I just bought from flyduino.net.
http://flyduino.net/FMP04-GPS-Modul
It fits on this:
http://flyduino.net/Flyduino-FMP04-GPS-Bob

It works marvelous with with my flyduino mega... for the mega, you will also want to order the small connector. Not sure if this is also required for the seeduino
http://flyduino.net/GPS-Kabel-20cm

The FMP04 is apparently the same as a MTK 3329.... I flashed it with the 115200 10 hz code posted here by EOSBandi (I think it was already at exactly the same firmware before), and it works perfectly !
http://code.google.com/p/i2c-gps-nav/downloads/list

BTW, there are two very small solder pads at the bottom left corner.... the 2nd can be connected to a led, and is used for position lock (blinking if still searching, solid when locked). See also the pictures linked here http://www.rcgroups.com/forums/showpost.php?p=21650308&postcount=3655
"R weglassen" means, do not install the resistor (if you're not very good in German).

Give it a try.... mine worked flawless with the EOSbandi R33 version (haven't tried Alex's latest dev yet).

mgros wrote:Could be better set home pos in other moment. Think if you are doing FPV, land, stop motors, arm and take off, you get a diferent home pos.

I have read a good idea in this forum, set home pos at first 3d Fix and reset every time you calibrate gyros.

See this post http://www.multiwii.com/forum/viewtopic.php?f=8&t=649&p=11123&hilit=gyro#p11123

      if (rcData[YAW] < MINCHECK && rcData[PITCH] < MINCHECK && armed == 0) {
        if (rcDelayCommand == 20) {
          calibratingG=400;
          #if GPS 
            GPS_reset_home_position();
          #endif
        }
      }

Alexinparis wrote:

mgros wrote:Could be better set home pos in other moment. Think if you are doing FPV, land, stop motors, arm and take off, you get a diferent home pos.

I have read a good idea in this forum, set home pos at first 3d Fix and reset every time you calibrate gyros.

See this post http://www.multiwii.com/forum/viewtopic.php?f=8&t=649&p=11123&hilit=gyro#p11123

It is implemented exactly like this at the moment.

Code: Select all

      if (rcData[YAW] < MINCHECK && rcData[PITCH] < MINCHECK && armed == 0) {
        if (rcDelayCommand == 20) {
          calibratingG=400;
          #if GPS 
            GPS_reset_home_position();
          #endif
        }
      }

       
 if (GPS_fix == 1 && GPS_numSat >= 5) {          
    if (armed == 0) {GPS_fix_home = 0;}
    if (GPS_fix_home == 0 && armed) {
             GPS_fix_home = 1;
             GPS_latitude_home  = GPS_latitude;
             GPS_longitude_home = GPS_longitude; 
             GPS_calc_longitude_scaling(GPS_latitude);  //need an initial value for distance and bearing calc            
             nav_takeoff_bearing = heading;             //save takeoff heading          
      } 

EOSBandi wrote:
Nope, in the latest shared, it's overwritten by the GPS code. (both serial and i2c)

Code: Select all

       
 if (GPS_fix == 1 && GPS_numSat >= 5) {          
    if (armed == 0) {GPS_fix_home = 0;}
    if (GPS_fix_home == 0 && armed) {
             GPS_fix_home = 1;
             GPS_latitude_home  = GPS_latitude;
             GPS_longitude_home = GPS_longitude; 
             GPS_calc_longitude_scaling(GPS_latitude);  //need an initial value for distance and bearing calc            
             nav_takeoff_bearing = heading;             //save takeoff heading          
      } 

We need an agreement or a config def for this... both method has it's advantages.....

msev wrote:Is that guy using that 6 position switch on 9x on some custom firmware? Does it have to be wired to more pins on the atmega64 than the typical 2 position switch?

EOSBandi wrote:Ok folks,
I just relised that I have commit rights on _shared... i'll commit fixes there, so r33 on the i2c-gps-nav repo will be officially depreceated...

Thanks to Alex for the merge.

And a small disclaimer : The gps code is based on the latest Arducopter navigation code, I just ported it to the MultiWii (and added some bells and whistles) so the real genius behind this code is Jason and the arducopter team.

jose_Quad wrote:Hi, recently bought this GPS http://ladyada.net/products/ultimategps/ with MTK3339-based module, I can flash the firmware 115200 10hz?
thanks

mahowik wrote:Guys,

Probably someone know custom/special firmware for mtk3339 to keep 115200 and 10hz? MiniGPS_v1.7.1 can read and change setting of this GPS module but can't to flash that modified settings ((

Actually it's possible to init from Arduino but it's not so useful...

p.s. sometimes new hardware is not the best, because it hard to find software for this...


thx-
Alex

jose_Quad wrote:the MiniGPS v1.4 can make changes, I have the same GPS

mgros wrote:What problem I can have using a GPS with 1 hz refresh data?

warthox wrote:gps ph/ch test. r33.
all values default except PosR P 3.6

https://vimeo.com/43211223

Sharkcopter wrote:Hi Warthox Very great video..
I have two questions about your video.
Is necessary to leave on the barometer when using the RTH?
Help the magnetometer in RTH?
Thanks

GoFaster wrote:Impressive and entertaining video, Warthox!
With all the electronics packed close together in a small volume, do you have magnetometer drift and noise?

flyrobot wrote:Hi Warthox,

Can you share what GPS do you use on the video?

Thanks,

John

mahowik wrote:

jose_Quad wrote:the MiniGPS v1.4 can make changes, I have the same GPS

thanks! it sounds strange but i will try... ))
are you sure that after reconnecting the power it keeps the settings? could you check your gps firmware version (located on "About" tab of MiniGPS program)?

i.e. you have used this "write setting into flash" block?

jose_Quad wrote:when I try to save, this window appears

void SerialPrint(uint8_t port, String str){
  uint8_t i = 0;
  while (i <= (str.length()-1)) {
    SerialWrite(port, (uint8_t)str.charAt(i));
    i++;
  }
}

#define GPS_SERIAL 2 // should be 2 for flyduino v2. It's the serial port number on arduino MEGA
#define GPS_INIT_BAUD   9600
#define GPS_BAUD   115200

SerialOpen(GPS_SERIAL,GPS_BAUD);
    //***************EOSBANDI quick hack to set the MTK gps to 10Hz.
    //$PMTK220,100*2F<cr><lf>
    SerialWrite(GPS_SERIAL,'$');
    SerialWrite(GPS_SERIAL,'P');
    SerialWrite(GPS_SERIAL,'M');
    SerialWrite(GPS_SERIAL,'T');
    SerialWrite(GPS_SERIAL,'K');
    SerialWrite(GPS_SERIAL,'2');
    SerialWrite(GPS_SERIAL,'2');
    SerialWrite(GPS_SERIAL,'0');
    SerialWrite(GPS_SERIAL,',');
    SerialWrite(GPS_SERIAL,'1');
    SerialWrite(GPS_SERIAL,'0');
    SerialWrite(GPS_SERIAL,'0');
    SerialWrite(GPS_SERIAL,'*');
    SerialWrite(GPS_SERIAL,'2');
    SerialWrite(GPS_SERIAL,'F');
    SerialWrite(GPS_SERIAL,'\r');
    SerialWrite(GPS_SERIAL,'\n');

SerialOpen(GPS_SERIAL, GPS_INIT_BAUD);
    // 251 PMTK_SET_NMEA_BAUDRATE
    SerialPrint(GPS_SERIAL, (String)"$PMTK251," + GPS_BAUD + "*1F\r\n");
    SerialEnd(GPS_SERIAL);
    delay(200);
  
    SerialOpen(GPS_SERIAL, GPS_BAUD);
    // 220 PMTK_SET_NMEA_UPDATERATE
    //Enable it for 10Hz mode
    SerialPrint(GPS_SERIAL, "$PMTK220,100*2F\r\n");
    delay(200);
    
    // 314 PMTK_API_SET_NMEA_OUTPUT (GGA, GSA and RMC frames)
    SerialPrint(GPS_SERIAL, "$PMTK314,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29\r\n");
    delay(200);
    
    // 300 PMTK_API_SET_FIX_CTL
    // This parameter controls the rate of position fixing activity.
    SerialPrint(GPS_SERIAL, "$PMTK300,100,0,0,0,0*2C\r\n");

warthox wrote:gps - MediaTek MT3339

flyrobot wrote:Hi Warthox,

Can you share what GPS do you use on the video?

Thanks,

John

rollinolin wrote:anyone know where i can get a usb board to connect my GPS to to flash it? I have the fmp04 (no bob) Is there a place in the states that sells them? and can i connect it directly to the usb board with out a gps bob?

will this board work?

mahowik wrote:

jose_Quad wrote:the MiniGPS v1.4 can make changes, I have the same GPS

thanks! it sounds strange but i will try... ))
are you sure that after reconnecting the power it keeps the settings? could you check your gps firmware version (located on "About" tab of MiniGPS program)?

i.e. you have used this "write setting into flash" block?

charbot wrote:Im in the same boat - I just got the mtk 3339 - heh,and Im a mac user, am I gonna have to dig my old windowsXP tower outta the basement to get I2c gps setup?, ughh.

mahowik wrote:

warthox wrote:gps - MediaTek MT3339

3339? not 3329?
still interesting how you switch this to 115200 and 10 hz? probably you found custom firmware for this?

thx-
Alex

flyrobot wrote:

flyrobot wrote:Hi Warthox,

Can you share what GPS do you use on the video?

Thanks,

John

Hi warthox,

Thanks for the info, what i meant is do you use serial (FMP04) or I2C (navigatron) ? I have both, but i see the difference in term of the signal reception sensitivity.

Thanks,

John

#define GPS_SERIAL 2 // should be 2 for flyduino v2. It's the serial port number on arduino MEGA
#define GPS_BAUD   38400