Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Reliable GPS and Compass sensors

Status
Not open for further replies.

baby_2

Advanced Member level 4
Joined
Jul 20, 2016
Messages
105
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
873
Hello,
I want to know what is the best and reliable GPS and compass sensors to connect to a micro-controller?

Thanks
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
17,420
Helped
3,935
Reputation
7,868
Reaction score
3,804
Trophy points
113
Activity points
115,497
Hi,

Another post asking for a "best" device....

Ask 10 designers for the "best" part and get 10 different answers.

Klaus
 

baby_2

Advanced Member level 4
Joined
Jul 20, 2016
Messages
105
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
873
Thank you KlausSt,
Yes you are right, but as you get familiar with different sensors by reading their datasheet you can make a good decision. I am grateful if anyone can help me.
 

eziggurat

Full Member level 6
Joined
Feb 15, 2002
Messages
322
Helped
30
Reputation
62
Reaction score
18
Trophy points
1,298
Activity points
2,915
For compass, I have only used Honeywell and ST. They both seems to work fine for a dead reckoning project. For GPS, I have only used Ublox. There are other cheaper units from MStar.
 
  • Like
Reactions: baby_2

    baby_2

    points: 2
    Helpful Answer Positive Rating

paulfjujo

Advanced Member level 4
Joined
Jun 9, 2008
Messages
1,349
Helped
275
Reputation
550
Reaction score
268
Trophy points
1,363
Location
France 01800
Activity points
9,456
Hello,


I tested 2 gps
GPS UBlox N7 + COMPASS
GPS Ublox NEO-6M

both GPS are easy to use and connect to a MCU .
Ublox provide a PC Software to test each GPS: U-CENTER
and a good documentation

for COMPASS , it is more complexe ...

U-Center_GPS_NEO_6M_via_PL2303.jpg
 
  • Like
Reactions: baby_2

    baby_2

    points: 2
    Helpful Answer Positive Rating

baby_2

Advanced Member level 4
Joined
Jul 20, 2016
Messages
105
Helped
1
Reputation
2
Reaction score
1
Trophy points
18
Activity points
873
Dear paulfjujo, I really appreciate your explanation.
Some of my friends used Ublox GPS and they told me, in some situations they need more than 2 minutes to track the GPS satellites or need to reset the module, Did you encounter with this issue?
 

paulfjujo

Advanced Member level 4
Joined
Jun 9, 2008
Messages
1,349
Helped
275
Reputation
550
Reaction score
268
Trophy points
1,363
Location
France 01800
Activity points
9,456
...in some situations they need more than 2 minutes to track the GPS satellites
at the first run of GPS, yes, it need 2 or 3 minutes to get all satellites in view.
it is a normal way for all GPS ..
GPS store the last position, to speed up, next calculations.
U-Center is a good tool to check all parameters to have the best initialising status.


After , even doing power off and power ON, it need's only a fews secondes to get back the position
if you are in same place ..
GPS can gives a quality indicator , depends of the number of satellites discovered and theyre power signal.

if weather is very cloudy, it's needs more time , because less satelites in the view.
But i never get issue wich oblige to reset the GPS.

Maybe considere also the application using the GPS !
 
  • Like
Reactions: baby_2

    baby_2

    points: 2
    Helpful Answer Positive Rating

eziggurat

Full Member level 6
Joined
Feb 15, 2002
Messages
322
Helped
30
Reputation
62
Reaction score
18
Trophy points
1,298
Activity points
2,915
Dear paulfjujo, I really appreciate your explanation.
Some of my friends used Ublox GPS and they told me, in some situations they need more than 2 minutes to track the GPS satellites or need to reset the module, Did you encounter with this issue?
Like what paulfjujo said, there are three different start options; hot, warm and cold start. These values varies between manufacturers. Most GPS chipset uses the standard NMEA protocol but ublox uses both NMEA and their propriety UBX which is a binarized protocol with fletcher checksum. If you are worried about startup time, you could create a dead reckoning system as well using compass, speed. I based the calculation on this website; https://www.movable-type.co.uk/scripts/latlong.html. For compass you would have to calibrate it depends on your casing or inside a car.

UBlox GPS works for me when I developed a vehicle location unit a while back (https://www.youtube.com/watch?v=_WJLDLymLKM&t=17s).
 
  • Like
Reactions: baby_2

    baby_2

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.
Toggle Sidebar

Welcome to EDABoard.com

Sponsor

Top