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What makes WiFi config persistent?
Posted: Mon Oct 31, 2016 8:12 pm
by cpr
If I follow the docs at
http://docs.micropython.org/en/latest/e ... f-the-wifi and use
Code: Select all
def do_connect():
import network
sta_if = network.WLAN(network.STA_IF)
if not sta_if.isconnected():
print('connecting to network...')
sta_if.active(True)
sta_if.connect('<essid>', '<password>')
while not sta_if.isconnected():
pass
print('network config:', sta_if.ifconfig())
in my main.py
to connect to my WiFi,
this is what I get at the REPL by connectoing with screen /dev/ttyUSB0 115200:
scandone
no <essid> found, reconnect after 1s
reconnect
...
scandone
no <essid> found, reconnect after 1s
reconnect
I am (only) curious as what this makes the config persistent?
Is that some Espressif stuff?
Would I need to
in some "shutdown" code to dsable this?
Re: What makes WiFi config persistent?
Posted: Mon Oct 31, 2016 9:13 pm
by markxr
The API provided by the espressif firmware does this automatically when you call the function to set the config.
There is a second function which does not save the config, there is a big discussion in this pull request:
https://github.com/micropython/micropython/pull/2510
On how / whether to use it.
Re: What makes WiFi config persistent?
Posted: Mon Oct 31, 2016 11:37 pm
by bitninja
I believe is actually implements it by writing the credentials to EEPROM. I seem to remember Arduino code that could manage it by reading/writing to the EEPROM.
Setting the STA interface to not be active will disable the constant trying to connect. All you have to do is re-enable it though (even after a reboot) and it will begin trying to connect again with the info stored in the EEPROM.
Anyway, it all seems to happen automatically... which ends up being convenient... at least for me!
Re: What makes WiFi config persistent?
Posted: Thu Apr 30, 2020 8:25 am
by cemox
Yesterday, I compiled the latest version of micropython for ESP8266 and I started seeing this annoying output in repl repeatedly:
Code: Select all
connected with Cisti, channel 1
dhcp client start...
ip:192.168.1.4,mask:255.255.255.0,gw:192.168.1.1
state: 5 -> 2 (22c0)
rm 0
reconnect
state: 2 -> 0 (0)
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 7
cnt
I have to enter "ctrl + c" to access the repl promt. Pretty annoying. It was not the case with 1.12 version of binary. Any ideas about how to get rid of it or suppress it?
Re: What makes WiFi config persistent?
Posted: Thu Apr 30, 2020 1:27 pm
by jomas
cemox wrote: ↑Thu Apr 30, 2020 8:25 am
Yesterday, I compiled the latest version of micropython for ESP8266 and I started seeing this annoying output in repl repeatedly:
Code: Select all
connected with Cisti, channel 1
dhcp client start...
ip:192.168.1.4,mask:255.255.255.0,gw:192.168.1.1
state: 5 -> 2 (22c0)
rm 0
reconnect
state: 2 -> 0 (0)
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 7
cnt
I have to enter "ctrl + c" to access the repl promt. Pretty annoying. It was not the case with 1.12 version of binary. Any ideas about how to get rid of it or suppress it?
See my post "jomas » Tue Apr 28, 2020 11:07 pm":
viewtopic.php?f=16&t=8234
Re: What makes WiFi config persistent?
Posted: Thu Apr 30, 2020 10:12 pm
by bitninja
If you edit your boot.py you can un-comment the
lines and that will remove most of the messages. I still get one message when I connect but otherwise it stays quiet.
Re: What makes WiFi config persistent?
Posted: Fri May 01, 2020 3:37 pm
by cemox
Thank you, it works.