GPS time from PyTrack

[jmpratt]

Is there a way to use the GPS time to set the RTC? I want to be able to log data from remote locations with no wifi access. I want the unit to be able to set the RTC to the correct time upon reset.

[jmpratt]

@andrethemac Thanks for letting me know! Your library is just what I was looking for.

[andrethemac]

@jmpratt I've had the same question, and was looking for a library that didn't use to much memory. So I wrote it myself (based upon the default library and @Neuromystix idea's. https://github.com/andrethemac/L76GLNSV4

best regards

[jmpratt]

@seb Ok. Thanks for the confirmation. I appreciate the help.

[seb]

@jmpratt

The L76GNSS library provided by pycom reads the NMEA sentences via I2C, there is no UART involved. The linked to code uses L76GNSS to get the sentenaces, and then micropyGPS to parse them

[robert-hh]

@jmpratt said in GPS time from PyTrack:

Anyone know of a way to contact an author on GitHub?

Raise an issue, then the owner will be notified.

[jmpratt]

@seb It looks like he's using both the micropyGPS and L76GNSS modules, which doesn't make any sense to me. Here he talks about seeing output on a UART with a PyTrack and the micropyGPS module: https://github.com/inmcm/micropyGPS/issues/7

Is he using the L76GNSS module to pull a NMEA sentence and then send it to the micropyGPS module for handling?

Anyone know of a way to contact an author on GitHub?

[seb]

@jmpratt

I see no mention of UART in the linked code

[jmpratt]

Ok, I'm confused. Here's a link for a project using the PyTrack with the micropyGPS module: https://github.com/ozeta/iot-gps-receiver. If the PyTrack uses I2C to communicate with the GPS chip, how can micopyGPS communicate with the chip via the UART?

[jmpratt]

@seb Got it. Thanks!

[seb]

@jmpratt

Check https://github.com/pycom/pycom-libraries

[jmpratt]

@seb Does Pycom have any example code that uses the GPS on the PyTrack? All I can find is the code that uses the accelerometer.

[seb]

@jmpratt
http://www.quectel.com/UploadImage/Downlad/Quectel_L76-L_I2C_Application_Note_V1.0.pdf

[jmpratt]

@seb Thanks. Is there a list of I2C commands that the GPS module supports?

[seb]

@jmpratt

It uses I2C to communicate

[jmpratt]

So does the GPS on the PyTrack communicate via a WiPy UART?

[livius]

@jmpratt
use https://github.com/inmcm/micropyGPS library
and there you have possibility to aqquire time from GPS
and next it is simple to set it to the rtc.init https://docs.pycom.io/chapter/firmwareapi/pycom/machine/RTC.html#rtcinitdatetimenone-sourcertcinternalrc