MicroPython Forum (Archive)

VladVons

i have upgraded my several ESP8266 devices from micropython v1.9.4-8-ga9a3caad0 to v1.10-8-g8b7039d7d and get strange kind of behavior while accessing device via ping. It looks like device sleeps first 5-10 seconds and then awakes. Rest devices with v1.9.4-8 are working good Is something changed in ...

VladVons

My pure free memory is 30720 Than i import App.py (free memory 17216) Than i try to free App (free memory still 18688) i tried this. No effect https://mail.python.org/pipermail/tutor/2006-August/048596.html >>> os.uname() MicroPython v1.9.4-8-ga9a3caad0 on 2018-05-11; ESP module with ESP8266 >>> gc....

VladVons

No working howto examples found.

Dynamically loadable native object code is definitely a feature that MicroPython wants to have, it would be very useful
(Damien George, Sep 11, 2017)

VladVons

is it possible to write external C library, save compiled file as SomeFile.so and call it from a python?
Something like plugins or libraries
Other words move trash outside micropython core and reduce its size with more ussage flexibility
DHT
cc3000
lcd160cr
....

import SomeFile
SomeFile.SomeMethod()

VladVons

http://micropython-dev-docs.readthedocs ... odule.html

VladVons

I have DHT21 sensor, 3 wires, 4,7 k resistor. It causes exception ETIMEOUT import dht import time aPin = 14 #Pin = machine.Pin(aPin, machine.Pin.IN, machine.Pin.PULL_UP) Pin = machine.Pin(aPin) Obj = dht.DHT22(Pin) time.sleep_ms(250) Obj.measure() -> exception : ETIMEOUT native GitHub micropython dr...

VladVons

Found the problem.

in earlier build versions there was not line

Code: Select all

uos.dupterm(machine.UART(0, 115200), 1)

i just owerrided boot.py with my edition with no uos.dupterm

VladVons

How to fix it?

daily builds mostly used by developers/testers and any print information is important.
what is the reason to silent the print()?
other info functions dont work too.
micropython.mem_info() etc...

VladVons

I didnt notice such problem in 1.9.3-XXX
in terminal 1.9.4-XXX builds there is no print output from a *.py, but in REPL everething is ok.

Code: Select all

#boot.py:
print('Hello') # no output

MicroPython v1.9.4-119......
>>> print('Hello') # output ok
Hello

VladVons

eval calculates epressions only.

it cant call and execute methods or functions

Code: Select all

eval("print('Hello World')")
SyntaxError: invalid syntax

MicroPython Forum (Archive)

Search found 60 matches

Network sleeps in micropython v1.10-8-g8b7039d7d

How to free memory after unused imports?

Re: external C library

external C library

Re: How to call C function in python code

DHT21 humidity sensor doesnt work

SOLVED. print() doesnt echo in ESP8266 daily builds

Re: print() doesnt echo in ESP8266 daily builds

SOLVED. print() doesnt echo in ESP8266 daily builds

Re: [SOLVED] exec() function doesnt return result?