How to include a module

[john7]

in wifi.py I have

Code: Select all

import network

class WIFI:
    def do_connect():
    #import network
    station = network.WLAN(network.STA_IF)
    station.active(True)
    if not station.isconnected():
        print('connecting to network...')
        station.connect('Niron', 'projects1234')
        while not station.isconnected():
            pass
    print('network config:', station.ifconfig())

in main.py

Code: Select all

#import wifi 
from wifi import WIFI

I get an error

ImportError: no module named 'wifi'

What should I do?

[OlivierLenoir]

You forget to indent below def do_connect():.

[john7]

You forget to indent below def do_connect():.

It's copy/paste problem. In the code I have all indents. Besides the compiler alerts in case of bad indentation.

I use the Thonny IDE in case if it's important.

[tve]

The error gets eaten, it's very annoying. Connect to the REPL and try to import wifi manually, then you will see the error that is preventing import.

[OlivierLenoir]

Can you try adding self in def do_connect(self):?

I've made the following test in repl.

Code: Select all

MicroPython v1.12 on 2019-12-20; ESP32 module with ESP32
Type "help()" for more information.
>>> 
paste mode; Ctrl-C to cancel, Ctrl-D to finish
=== import network
=== 
=== class WIFI:
===     def do_connect(self):
===         station = network.WLAN(network.STA_IF)
===         station.active(True)
===         if not station.isconnected():
===             print('connecting to network...')
===             station.connect('Niron', 'projects1234')
===             while not station.isconnected():
===                 pass
===         print('network config:', station.ifconfig())
>>> c = WIFI()
>>> c.do_connect()
I (16280) wifi: wifi driver task: 3ffe2f38, prio:23, stack:3584, core=0
I (32778) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (32788) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (32818) wifi: wifi firmware version: aeed694
I (32818) wifi: config NVS flash: enabled
I (32818) wifi: config nano formating: disabled
I (32818) wifi: Init dynamic tx buffer num: 32
I (32828) wifi: Init data frame dynamic rx buffer num: 32
I (32828) wifi: Init management frame dynamic rx buffer num: 32
I (32838) wifi: Init management short buffer num: 32
I (32838) wifi: Init static rx buffer size: 1600
I (32848) wifi: Init static rx buffer num: 10
I (32848) wifi: Init dynamic rx buffer num: 32
I (32948) phy: phy_version: 4102, 2fa7a43, Jul 15 2019, 13:06:06, 0, 0
I (32948) wifi: mode : sta (24:6f:28:17:ee:3c)
I (32948) wifi: STA_START
connecting to network...
I (35008) wifi: STA_DISCONNECTED, reason:201
no AP found
I (37058) wifi: STA_DISCONNECTED, reason:201
no AP found

[OlivierLenoir]

I'm connected when I put my personnel wifi network parameter.

Code: Select all

I (32594) network: CONNECTED
I (35534) event: sta ip: 192.168.100.83, mask: 255.255.255.0, gw: 192.168.100.254
I (35534) network: GOT_IP
network config: ('192.168.100.83', '255.255.255.0', '192.168.100.254', '192.168.100.254')

[OlivierLenoir]

I should consider the following code to be able to provide SSID and password.

Code: Select all

import network

class WIFI(object):

    def __init__(self, ssid, passwd):
        self.ssid = ssid
        self.passwd = passwd

    def do_connect(self):
        self.station = network.WLAN(network.STA_IF)
        self.station.active(True)
        if not self.station.isconnected():
            print('connecting to network...')
            self.station.connect(self.ssid, self.passwd)
            while not self.station.isconnected():
                pass
        print('network config:', self.station.ifconfig())

conn = WIFI('Niron', 'projects1234')
conn.do_connect()

[john7]

I should consider the following code to be able to provide SSID and password.

the code is working if I put it in main.py. The problem to import from another file.

[john7]

The error gets eaten, it's very annoying. Connect to the REPL and try to import wifi manually, then you will see the error that is preventing import.

As I understand Thonny looks in installation directory when it sees an import directive. May be I should provide the full path to the file?

[OlivierLenoir]

the code is working if I put it in main.py. The problem to import from another file.

1. Create file wifi.py on your computer with the here bellow code
2. Connect to your board rshell -p /dev/ttyUSB0
3. Use rshell to copy wifi.py on your board cp wifi.py /pyboard/
4. From rshell start repl
5. You can now import your module from wifi import WIFI
6. ...

Code: Select all

olivier@ole02-t510:~/Documents/MicroPython/Forum$rshell -p /dev/ttyUSB0
[i]Using buffer-size of 32
Connecting to /dev/ttyUSB0 (buffer-size 32)...
Trying to connect to REPL  connected
Testing if ubinascii.unhexlify exists ... Y
Retrieving root directories ... /boot.py/
Setting time ... Mar 17, 2020 09:33:27
Evaluating board_name ... pyboard
Retrieving time epoch ... Jan 01, 2000
Welcome to rshell. Use Control-D (or the exit command) to exit rshell.[/i]
/home/olivier/Documents/MicroPython/Forum> cp wifi.py /pyboard/
/home/olivier/Documents/MicroPython/Forum> repl
Entering REPL. Use Control-X to exit.
>
MicroPython v1.12 on 2019-12-20; ESP32 module with ESP32
Type "help()" for more information.
>>> from wifi import WIFI
>>>conn = WIFI('Niron', 'projects1234')
>>>conn.do_connect()

File wifi.py

Code: Select all

import network

class WIFI(object):

    def __init__(self, ssid, passwd):
        self.ssid = ssid
        self.passwd = passwd

    def do_connect(self):
        self.station = network.WLAN(network.STA_IF)
        self.station.active(True)
        if not self.station.isconnected():
            print('connecting to network...')
            self.station.connect(self.ssid, self.passwd)
            while not self.station.isconnected():
                pass
        print('network config:', self.station.ifconfig())