Lopy with pytrack, how connect/use GPS?

[crumble]

@zceld is the micropythnGPS library written for the pytrack? First lines of your screenshot let me assume that it was written for another board. So if you cannot simply configure it to use the pytrack, you have to rewrite some parts.

You should not use L76Gnss.py and this MicropythonGPS library at the same time. They may not interfere each other, but compiling them will need some RAM, which you need for other stuff.

[seb]

You also now have to include the pycoproc.py file from here: https://github.com/pycom/pycom-libraries/tree/master/lib/pycoproc

This contains common code between the pysense and pytrack and was refactored into its own library to reduce duplication of code.

[zceld]

@crumble Hi, thanks for your recommendations. I really do not know how micropyGPS is for my chip which is a pycom Lopey 1.0 with the pytrack board. I am new in this world of plates. Then use both libraries I do not think it happens, because at the moment my procedure to prove it is having the board connected by USB to ATOM executing code like the one that I attached "micropyGPS" with the hope of obtaining coordinates. I have added in the directory '/ lib' the files L76GNSS.py, pycoproc.py and Pytrack.py. I understand that I complete the necessary libraries to get coordinates with the GPS chip, right? So now I would have to do a small program that connects with the GPS chip and get the coordinates of the location.

0_1516113906139_microGPS.py

[zceld]

@seb I have already added the file to the directori '/ lib' now I would need to know how to get the gps position using the libraries.

[zceld]

@livius

Good afternoon, I followed your steps to the detail.

I have updated the pytrack.
I updated the pycom Lopy.
I have added the libraries within the directory '/ lib' as they are in this post:

https://github.com/pycom/pycom-libraries/tree/master/pytrack

Then the main file has not been modified because I run it from Atom connected by usb and execute it like this:

this main.py : 0_1516121243856_main1.py

The original is extracted from here:
https://github.com/pycom/pycom-libraries/blob/master/pytrack/main.py

but modifying the lines 8,10,11;

He always tells me the same thing:

I run out of ideas to make it work. :-(

[seb]

@zceld said in Lopy with pytrack, how connect/use GPS?:

https://github.com/pycom/pycom-libraries/blob/master/pytrack/main.py

Here is a simplified version of that main.py file, does this work for you:

import time
from L76GNSS import L76GNSS
from pytrack import Pytrack

py = Pytrack()
l76 = L76GNSS(py, timeout=30)
while (True):
    coord = l76.coordinates()
    print(coord)
    time.sleep(1)

[zceld]

@seb

I'm sorry, but it does not work:

[livius]

@zceld said in Lopy with pytrack, how connect/use GPS?:

but modifying the lines 8,10,11;

why do you modified those lines?
better change this:
https://github.com/pycom/pycom-libraries/pull/43/files

[zceld]

@livius said in Lopy with pytrack, how connect/use GPS?:

why do you modified those lines?
better change this:

Just remove them for testing because with the original I get this another error:

The suggested change is to add the 'if' no?
It would be like this the file I suppose:

[seb]

@zceld

That error means that there is something wrong with /flash/lib/L76GNSS.py, Can you please reformat your device by running the following in the REPL:

import os
os.mkfs('/flash')

And then download a fresh copy of all the files from git to make sure they are not currupt, you should have:

main.py
lib/L76GNSS.py
lib/pytrack.py
lib/pycoproc.py

[livius]

@zceld
go to advice provided by @seb (remember that this clear your device flash completly)
and if you need to use microGPS.py
then you need to change line in L76GNSS.py

 nmea += self._read().lstrip(b'\n\n').rstrip(b'\n\n')

and feed microGPS object with chars from nmea e.g.

create first microGPS object somwhere in the file `L76GNSS.py` that it will be accessible (best is add it as property)
mgps = MicropyGPS()
.....
nmea = self._read().lstrip(b'\n\n').rstrip(b'\n\n')
for c in nmea:
   sentence = mgps.update(c)
   if sentence:
       do_something_here

[zceld]

@seb
Hello again!

I followed your steps and used 'os.mkfs (' / flash ')'
I have copied again the codes of the page:
https://github.com/pycom/pycom-libraries/tree/master/pytrack/lib

From here I copied the three files and also the main.
I tried to run and this error came out:

So I went to download that library to see if that solved that.
I copied it from here:
https://github.com/pycom/pycom-libraries/tree/master/lib/pycoproc

I have uploaded the library to the device and that problem seems to have
been solved.

Then he stopped in the following:

There is something that I do not understand or that I do not do well, I do not think it is so difficult. Therefore I wanted to try to execute the code directly in the Atom console so following the example that you have put me:

and neither.

So, I do not know what exactly each program is for. That is to say for example this file:
https://github.com/pycom/pycom-libraries/blob/master/pytrack/main.py

I understand that it serves to run from Atom and I print on screen the data obtained from the GPS module ?. It would be more or less what I'm looking for since what I need is for this plate to be carried by a vehicle and while it is on, keep the GPS position every 30 seconds.

For example, the microGPS file does not know what it is for. I was just testing everything I found to refer to the GPS to see if I could get data.

But I have to admit that I'm stuck. I do not know what I do wrong or what else to try.

[seb]

That error message means the library was not able to detect the Pytrack. Are you sure you have connected your module to your pytrack board properly, are all the pins pushed in fully? Have you updated the firmware on your Pytrack board to the latest available? (note: this is not the same as the firmware of the main pycom module)

[zceld]

@seb

Well, since you told me in the procedure to update it. Therefore I have the 'pytrack' and 'pycom' plate:

I understand that the board is well connected because I connect with it by the usb from pytrack to Atom and it responds to all commands os. , for example pycom.heartbeat (False) and the LED goes off. I also upload a short video and show you the directory listings.
video/gif:
https://imgur.com/a/eQl9h

Directory:

Everything you need I'll show you to know or reach the solution.

[seb]

Hi,

Thanks for confirming all of that. To debug this further could you change the following two lines of code in pycoproc.py so we can see in more detail what error is occurring:

108        except Exception:
109            raise Exception('Board not detected')

to

108        except Exception as e:
109            print(e)
110            raise Exception('Board not detected')

[zceld]

@seb

ok, I added the line of code you indicated and updated the file on the board:

I check that the lines of code are in the uploaded file:

Bien, pues pruebo de nuevo a ejecutar el main.py:

Result:

[seb]

Thats odd, its showing that the firmware version is outdated but you showed me the screenshot of you updating it. Can you please run the following in the REPL after the error:

py.read_fw_version()

and post back what it returns?

[zceld]

@seb

true !, according to the console and the screenshot I answered that it had been updated successfully. I will also do it again from this pc that is different. For trying, I lose nothing.

[seb]

you typed that in wrong, its py not pycom

[zceld]

@seb yes! Sorry, as I gave an error I was trying and I sent you a test here you have the complete test.

You will also have to apologize for taking a long time to answer the forum, it does not allow me to respond faster.: