MicroPython Forum (Archive)

https://github.com/inmcm/MTK_commands

A very simple set of functions to build the various command sentences used on MediaTek MTK3329 and MTK3339 based GPS receivers.

Developed in conjunction with micropyGPS: https://github.com/inmcm/micropyGPS

https://github.com/inmcm/micropyGPS This is small and easy to use parser for NMEA navigation sentences used on many GPS receivers modules. The github page has a much more extensive explanation and usage examples. This was developed in conjunction my MTK33X9 chip set command generator: https://github...

All interrupt errors (even syntax errors) are reported as MemoryErrors unless you do something like this: import micropython micropython.alloc_emergency_exception_buf(100) That's really handy to know. I tried it and, sure enough, you can see where it throws a stack locked exception on allocation du...

I've updated the library with some new features and bug fixes. I also made one quick try to make a script that uses an external interrupt to trigger the updater, but it crashed with a MemoryError. I thought I might get away with it since virtually every variable in the object is pre-allocated. Sadly...

I think we should add a callback mechanism to UART receive, but would you use it in this case for more than just buffering data at the Python level? If you had a callback, how exactly would you user it? Would it be better to have a callback for "receive buffer half full" rather than "one char recei...

Thank you for the kind words. blmorris, I've also given some thought to how to 'feed' the object efficiently. I haven't looked into the asyncio yet, so I can't comment on that. In general though, given this is GPS, you're going to get data from the receiver regularly. As long as you schedule in some...

For the past couple weeks I've been working on a GPS NMEA sentence parser that will work well with Micropython and the pyboard. The code and some explanation are available at Github: https://github.com/inmcm/micropyGPS I'm most definitely still working on it, but I feel the code is far enough along ...