Is it possible to use ogps for a generic GPS tracker

crispyoz

@Marko-Lukat This seems like classic buffer overrun behaviour which would make sense since you're feeding the terminal at double the rate.

Radek

Guys, as first I would just like to say, I'm involved in an Open Source project and participate in few others and I really don't remember to ever encounter such a friendly and helpful community. I really thank you so much.

@Marko-Lukat : sadly it still doesn't work for me and the log file (nice name) is being actually filled with correct data. I'm pretty sure I'm screwing something.

Attaching the log file.

Sorry, wasn't able to upload for some reason. Here it is: https://cloud.sigsiu.net/f/d3d210f48188414581e0/

Radek

wow, wait, it looks like the coordinates in the file are multiplied about 100 times

Marko Lukat

@Radek said in Is it possible to use ogps for a generic GPS tracker:

wow, wait, it looks like the coordinates in the file are multiplied about 100 times

That's how it is defined. Don't worry.

BUT ... ugps is hardwired for $GP on the sequences it accepts (RMC/GGA/VTG/TXT). And your device delivers $GN. Ouch! Looks like we need a lot of fixes!

configurable baudrate (at least 4800..115200)
ignore initial two letters
potentially fix callback starving

Just noticed that your first data dump shows $GP sentences, but the logfile uses $GN where it matters ... otherwise we'd have spotted it earlier.

Marko Lukat

A new test version is available from github. Baudrate can now be specified with the -b parameter, NMEA sentence filtering is now more relaxed.

Radek

Wow, we are definitely a step further. When I start the version @Marko-Lukat provided with ugps -b 9600 -S -d 7 /dev/ttyS1 this is what I am getting:

root@Omega-9A9F:~# ugps -b 9600 -S -d 7 /dev/ttyS1
Failed to add object: Invalid argument
ugps: date: 2020-06-30T19:51:08 UTC
ugps: position: 49.928734 9.003940
ugps: height: 149.8
ugps: date: 2020-06-30T19:51:09 UTC
ugps: position: 49.928734 9.003942
ugps: height: 149.5
ugps: date: 2020-06-30T19:51:10 UTC
ugps: position: 49.928734 9.003942
ugps: height: 149.1
ugps: date: 2020-06-30T19:51:11 UTC
ugps: position: 49.928734 9.003945
ugps: height: 148.8
ugps: date: 2020-06-30T19:51:12 UTC
ugps: position: 49.928726 9.003947
ugps: height: 148.5

I modified the /etc/init.d/ugps like this:

#!/bin/sh /etc/rc.common
# Copyright (c) 2014 OpenWrt.org

START=80

USE_PROCD=1
PROG=/usr/sbin/ugps

service_triggers() {
	procd_add_reload_trigger gps
}

start_service() {
	local tty="$(uci get gps.@gps[-1].tty)"

	[ -d "/sys/class/tty/$tty/" ] || return

	procd_open_instance
	procd_set_param command "$PROG" "-d 9600" "/dev/$tty"
	procd_set_param respawn
	procd_close_instance
}

But ubus call gps info still returns:

root@Omega-9A9F:~# ubus call gps info
{
	"signal": false
}

I am probably missing some small thing. But thanks a lot for your help. It's already a huge successes.

Regards,
Radek

Radek

Ok guys, I discovered another thing. When I start the demon with the file I modified it will return the signal=false. But if I start ugps manually with ugps -b 9600 /dev/ttyS1 & the ubus call gps info will return

root@Omega-9A9F:~# ubus call gps info
{
	"age": 1,
	"latitude": "49.928703",
	"longitude": "9.003965",
	"elevation": "147.6",
	"course": "",
	"speed": ""
}

So I am pretty sure the ogps itself works perfectly ok now.

Marko Lukat

This (Failed to add object) sounds more like there is already/still a gps ubus object added to the daemon. Can you make sure there is no other ugps instance running?

Also in your init.d script, I assume this is a typo and it actually reads -b 9600, not -d 9600?!

Radek

OMG. I am such an idiot. One typo and I am wasting your precious time. But

It is XXXXX works right now

Thank you sooooo much. It works perfectly now. I am sooooo happy.

Regards,
Radek

Radek

Sorry about the f word

crispyoz

@Radek it is a breach of the terms of use. I edited it out rather than apply any penalty.

Radek

@crispyoz I got it. Thanks a lot. I was just too excited

crispyoz

@Radek I think we all appreciate your passion and we look forward to your future contributions.