8000 Raspberry Pi Pico W network becomes inaccessible when not used for some time · Issue #6958 · adafruit/circuitpython · GitHub
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Raspberry Pi Pico W network becomes inaccessible when not used for some time #6958

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anecdata opened this issue Sep 28, 2022 · 2 comments · Fixed by #6976
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Raspberry Pi Pico W network becomes inaccessible when not used for some time #6958

anecdata opened this issue Sep 28, 2022 · 2 comments · Fixed by #6976
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bug network rp2040 Raspberry Pi RP2040
Milestone
8.x.x

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@anecdata
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anecdata commented Sep 28, 2022 •
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CircuitPython version

Adafruit CircuitPython 8.0.0-beta.0-65-g5781bd318 on 2022-09-22; Raspberry Pi Pico W with rp2040

Code/REPL

import time
import supervisor
import microcontroller
import wifi
import socketpool
import adafruit_requests
from secrets import secrets

TEXT_URL = "http://wifitest.adafruit.com/testwifi/index.html"

pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool)

while not wifi.radio.ipv4_address or "0.0.0.0" in repr(wifi.radio.ipv4_address):
    print(f"Connected?")
    wifi.radio.connect(secrets["ssid"], secrets["password"])
print(f"{wifi.radio.ipv4_address}")

# increase delay between requests each time
interval_sec = 0
increment_sec = 60
timer_sec = time.time() - interval_sec
while True:
    if time.time() - timer_sec > interval_sec:
        try:
            r = requests.get(TEXT_URL)
            print(f"{interval_sec:>5} {r.status_code} {r.reason.decode()} {r.content}")
            r.close()
            interval_sec += increment_sec
        except OSError as e:
            print(e)
            # supervisor.reload()  # not enough, must reset
            microcontroller.reset()
        timer_sec= time.time()

Behavior

Documented here:
#6933 (review)

Possibly related to power-saving mode described in section 3.6.3 here.

Same behavior in MicroPython, issue link will be posted here:
micropython#9455

Description

No response

Additional information

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@anecdata anecdata added bug network rp2040 Raspberry Pi RP2040 labels Sep 28, 2022
@anecdata anecdata mentioned this issue Sep 28, 2022
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@anecdata
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anecdata commented Sep 29, 2022 •
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Pinging the device periodically from an external source also seems to extend accessibility of the network. Toggling the LED (which exercises the wifi module) gave mixed results... several runs with 5 minute intervals, one run with 6-7 minute interval.

Perhaps it is intentional in MicroPython. With Power-Saving mode off, much longer intervals are possible. If it is intentional, we may need a way to re-awaken the network without the failure that requires restart.

@dhalbert dhalbert added this to the 8.x.x milestone Sep 30, 2022
@jepler jepler mentioned this issue Sep 30, 2022
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I'll test CircuitPython with artifacts after 84c7ac4, with power-save on and off, and try to confirm the hypothesis that power-save mode 0 (no power save) fixes this issue.

@jepler jepler mentioned this issue Sep 30, 2022
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@dhalbert dhalbert mentioned this issue Apr 17, 2025
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@anecdata anecdata mentioned this issue Apr 22, 2025
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