Re: [gpsd-dev] writing commands to the gps

[Felipe Gutierrez]

Hi,

Thanks for your comments.

I have a Module u-blox NEO 6M on my raspberry Pi B3. I think the driver it is using is the ubx [1] (I don't know how to reference the source code from [2]). My first guess was to look at the "write" functions, like ubx_write, gpsd_write.

but I don't know where is the sequence of messages to send to the serial port. Could you give some light on this?

I also don't know how to see the commands on the debug mode. I changed the gpsd initiation for Debug level 3 "gpsd -n /dev/serial0 -D3 -F /var/run/gpsd.sock", but where can I see the debug messages?

[1] https://github.com/biiont/gpsd/blob/master/driver_ubx.c

[2] http://git.savannah.gnu.org/cgit/gpsd.git

Thanks,

Felipe

--

-- Felipe Gutierrez

-- skype: felipe.o.gutierrez

-- https://felipeogutierrez.blogspot.com

On Thu, Aug 30, 2018 at 1:07 AM teyrana <address@hidden> wrote:

On Wed, Aug 29, 2018 at 2:31 PM Gary E. Miller <address@hidden> wrote:

Yo Felipe!

On Wed, 29 Aug 2018 16:36:55 +0200
Felipe Gutierrez <address@hidden> wrote:

> I am using a C program [1] with gpsd library to get data from my gps
> device. It is working very well.

Cool.

> Now I want to read data directly from the serial port and get the
> result from the gps device.

Still, a couple of suggestions: 

Getting at the serial port without gpsd is system-dependent, and you'll probably need to stop gpsd while you interface directly with the serial port.

A few suggestions for programs to look at:

If using darwin/OSX or *nix, on the command line:

1. 'minicom'

2. 'stty' and 'cat' commands

Under Windows, PuTTY is a good place to start: 

https://software.intel.com/en-us/setting-up-serial-terminal-on-system-with-windows

Good Luck! 

-Dan