Code only works from Visual Studio

[dclaar]

I have this code:

def main():
  purple_air = PurpleAir()
  # Reset orientation when A pushed. End test if testing.
  btnA.wasPressed(purple_air.SetOrientation)
  btnB.wasPressed(purple_air.Testing)

  wifi_try_count = 0
  while True:  while True:
    if not (wifiCfg.wlan_sta.isconnected()):
      wifi_try_count += 1
      purple_air.ShowError(
        'No WiFi ({:d})'.format(wifi_try_count))
      wifiCfg.doConnect('FBI', 'CIA')
      purple_air.ShowError('WiFi connected')
    else:
      purple_air.ShowError('Trying')
      try:
        purple_air.GetAQI()
      except Error as e:
        purple_air.ShowError(e)
    purple_air.ShowError('Waiting')
    wait_ms(1)
    purple_air.ShowError('Done')

When I run from Visual Studio, it connects to WiFi, prints WiFi Connected, Waiting, Done, Trying all in a row.

When I disconnect it, choose it from the App screen, it will stop at WiFi Connected. If I yank out the entire else clause, then it will stop at Waiting. In either case, exactly 1 print statement after connecting to WiFi.

It's not actually completely dead: Pressing the A or B buttons execute the callbacks as expected.

But I can't figure out why it reacts differently connected vs. unconnected!

Any ideas?

[dclaar]

OK, I have no idea why, but taking out the else: works. (I took out main() first, and that didn't help, but I didn't put it back in once things worked). I haven't run it for a long time, so it might still hang, but initial indications are promising!

while True:
  if not (wifiCfg.wlan_sta.isconnected()):
    wifi_try_count += 1
    purple_air.ShowError(
      'No WiFi ({:d})'.format(wifi_try_count))
    wifiCfg.doConnect('Mi5', 'double07')
    purple_air.ShowError('WiFi connected')
  try:
    purple_air.GetAQI()
  except Error as e:
    purple_air.ShowError(e)
  wait_ms(1)

[dclaar]

Nope, spoke too soon. It just takes longer to hang. :(

[dclaar]

I found out that you can actually get a serial console, and it says:

Traceback (most recent call last):
  File "main.py", line 130, in <module>
  File "main.py", line 128, in <module>
  File "main.py", line 96, in GetAQI
NameError: name 'wait_ms' isn't defined

Don't ask me why it works when connected to the laptop, though!

Serves me right for trying to limit the imports. :)

[lukasmaximus]

wait_ms is part of the uiflow class, did you import it at the start of your program?

[dclaar]

I was trying to be "more pythonic" and not import *, i.e.

from m5stack import lcd

It didn't occur to me that it was in uiflow!
I've gone back to importing everything. :)

[robalstona]

I noticed that some development environments use REPL when transferring files and running. And by the way, they silently import various system libraries / modules. Eg uPyCraft imports os library to display a list of files. By the way, the wait_ms () can be imported from the time library

[dclaar]

Given that I can now see the console, I determined that it throws OSError if the http GET fails. Which is a weird error to throw, but OK. So I put that in my except: clause, and it's humming away!