machine.SOFT_RESET

[robotmad]

LoPy updated to 0.9.0.b2
Following the tutorial for WLAN (section 3.2)
[https://docs.pycom.io/lopy/lopy/tutorial/wlan.html]
I an getting an error
AttributeError: 'module' object has no attribute 'SOFT_RESET'

[robotmad]

Investigating I see that after a soft reset (Ctrl-D) reset_cause() still reports 'None'.

Further:
wlan.init(WLAN.STA)
gives an error:
TypeError: extra positional arguments given

Although initialising
wlan =WLAN(mode=WLAN.STA)
works OK.

[A Former User]

Hi robotmad,
Great to hear that you found a solution. Indeed there is a mistake in the example.
It should be like here: https://docs.pycom.io/wipy/library/network.html?highlight=wlan.init#network.wlan.init
We will fix example code.
Reset cause function not jet implemented on LoPy board. We working on that.

[robotmad]

More observations...

• Expansion board manual shows use of "GP" values for identifying the IO pins e.g. "GP16", but you actually seem to have to
• pushbutton on G17, even when set as an input (with a PULL_UP) this pin appears to be driven low (not a fault on the expansion board), so the pushbutton input doesn't work.
• the heartbeat LED won't show any colour other than Blue.
• I've not found any means to control timing given the absence of the Timer class - e.g. to get a LoRa node to send a message once every XXX seconds?
• It is easy to get a crash with LoRa things being in a tight loop (hence the need for some means to control timing):
  /home/danicampora/Code/pycom/esp-idf-new/components/freertos/./queue.c:1326 (xQueueGenericReceive)- assert failed!
  Guru Meditation Error: Core 0 panic'ed.

Please can we have more documentation e.g.

• What does the parameter to the LoRa socket recv function do?

[kurt]

@Maris said in machine.SOFT_RESET:

https://docs.pycom.io/wipy/library/network.html?highlight=wlan.init#network.wlan.init

Sorry, I don't get it. What is it to be done instead of checking for machine.SOFT_RESET? Or has the documentation in https://docs.pycom.io/wipy/library/network.html?highlight=wlan.init#network.wlan.init changed again?

Cheers, Kurt.

[A Former User]

@kurt We try to constantly fix mistakes in documentation, so time by time documents get updated.

Please use code from WiFi example https://docs.pycom.io/lopy/lopy/quickref.html#wlan-wifi

[kurt]

@Maris I appreciate your work to improve the documentation and your quick response.

I tried the code you suggested:

from network import WLAN

# configure the WLAN subsystem in station mode (the default is AP)
wlan = WLAN(mode=WLAN.STA)
# go for fixed IP settings
wlan.ifconfig(config=('192.168.2.5', '255.255.255.0', '192.168.2.1', '8.8.8.8'))
#wlan.ifconfig(config='dhcp') # trying dhcp
wlan.scan()     # scan for available networks
wlan.connect('my-ssid', auth=(WLAN.WPA2, 'my-password'), timeout=5000)
for i in range(10):
    if wlan.isconnected():
        break
print(wlan.ifconfig())

When I check wlan.ifconfig() it prints ('192.168.2.5', '255.255.255.0', '192.168.2.1', '0.0.0.0'). The DNS address is set to 0!
Then it starts printing reconnect, repeating it endlessly, no timeout. I can stop it by issuing a wlan.disconnect().

The whole reset sequence using the code above looks like this:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:QIO, clock div:2
load:0x3fff9010,len:8
load:0x3fff9018,len:312
load:0x40078000,len:2352
load:0x4009f000,len:1196
entry 0x4009f2d8
frc2_timer_task_hdl:3ffd2704, prio:22, stack:2048
tcpip_task_hdlxxx : 3ffd7224, prio:18,stack:2048
pp_task_hdl : 3ffdb494, prio:23, stack:8192
mode : softAP(24:0a:c4:00:11:c9)
dhcp server start:(ip: 192.168.4.1, mask: 255.255.255.0, gw: 192.168.4.1)
dhcp server start:(ip: 192.168.4.1, mask: 255.255.255.0, gw: 192.168.4.1)
mode : sta(24:0a:c4:00:11:c8)
('192.168.2.5', '255.255.255.0', '192.168.2.1', '0.0.0.0')
MicroPython f5444c7 on 2016-10-12; LoPy with ESP32
Type "help()" for more information.
>>> reconnect
reconnect
reconnect
reconnect
...

Any idea?

[daniel]

Hi kurt,

Thanks for the report. I confirm that there's a bug on the DNS setting part. I cannot reproduce your reconnect issue yet, but I'll look into it.

Cheers,
Daniel

[kurt]

@daniel, I got it working using the code example that @DarkHawk posted here.
I only added a line wlan.ifconfig(config=('192.168.2.5', '255.255.255.0', '192.168.2.1', '8.8.8.8'))
before nets = plan.scan().

When I compare the few lines of code I cannot really see the difference. I'm not sure, but the only logical explanation would be a typo in the ssid or password. Of course I confirmed them several times...

Only issue left is the DNS but that you know about already.