Out of Memory Issue about micropygps HOT 6 CLOSED

Yes, I can just use my Raspberry directly and interface my GPS module with it, but I have my reasons why I want the NodeMcu as the point of data capture (for example it's smaller and cheaper).

from micropygps.

I did some experiments with the mem_info within the Unix version of micro python to see just how much memory was being consumed on import:

>>> from micropython import mem_info
>>> mem_info()
mem: total=6681, current=2911, peak=4486
stack: 928 out of 80000
GC: total: 2072832, used: 4096, free: 2068736
 No. of 1-blocks: 41, 2-blocks: 21, max blk sz: 41, max free sz: 64640
>>> from micropyGPS import MicropyGPS
>>> mem_info()
mem: total=107812, current=29518, peak=92472
stack: 928 out of 80000
GC: total: 2072832, used: 33824, free: 2039008
 No. of 1-blocks: 300, 2-blocks: 45, max blk sz: 80, max free sz: 61718

As a quick test, I deleted all the "test" at in the __main__ section and re-ran the import test. Surprisingly, the usage was much lower

>>> from micropython import mem_info
>>> mem_info()
mem: total=8610, current=2980, peak=4555
stack: 928 out of 80000
GC: total: 2072832, used: 4000, free: 2068832
 No. of 1-blocks: 46, 2-blocks: 17, max blk sz: 41, max free sz: 64643
>>> from micropyGPS import MicropyGPS
>>> mem_info()
mem: total=87457, current=22271, peak=70409
stack: 928 out of 80000
GC: total: 2072832, used: 25280, free: 2047552
 No. of 1-blocks: 196, 2-blocks: 30, max blk sz: 80, max free sz: 62461

I re-ran the test several times and got similar numbers. I went ahead and stripped the the code from __main__ and pushed it into a separate tests.py. It's very interesting that just importing the class brings in all that other code from the main module. Maybe a bug in Micropython?

from micropygps.

I can reproduce this. I need to think about how to reduce memory use even more (possibly precompiling to frozen bytecode) because I'm also running a bunch of other i2c devices on the same nodemcu.

from micropygps.

Also, the nodemcu board might have 128kB RAM, but less than 50kB are available once the underlying RTOS and micropython are load.

from micropygps.

@markserrano915 @inmcm @ckuethe
I've been trying to use this library on Wemos D1 Mini Lite 1.0.0.
Here it is the output:

>>> from micropython import mem_info
>>> mem_info()
stack: 2096 out of 8192
GC: total: 35968, used: 10240, free: **25728**
 No. of 1-blocks: 26, 2-blocks: 4, max blk sz: 264, max free sz: 554
>from micropyGPS import MicropyGPS
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError: memory allocation failed, allocating 832 bytes

from micropygps.

I could use the library on an ESP32 after precompiling it as a frozen module.

from micropygps.