Crashing after a couple of hours

[Åke Forslund]

Hi I'm setting up a temperature sensor using the gPy device. My idea was to have it in deepsleep for ~30 minutes and then perform a measurement and go back to sleep.

I've created a main.py that looks like this:

from machine import Pin
import time
from onewire import DS18X20, OneWire


print("Booted into application at {}".format(time.time()))


def get_temperature():
    """Get temperature from OneWire sensor."""
    ow = OneWire(Pin('P10'))
    temp = DS18X20(ow)
    for _ in range(10):
        temperature = temp.read_temp_async()
        time.sleep(1)
        temp.start_conversion()
        if temperature:
            break
    return temperature


def publish_to_web(temperature):
    print('Publishing a temperature of {}'.format(temperature))
    pybytes.send_signal(0, temperature)

time.sleep(1)
temperature = get_temperature()
publish_to_web(temperature)
time.sleep(1)
print("Going to sleep")
pybytes.deepsleep(30*60*1000) # 30 Minutes

And this works for some time but after 5-8 hours samples stop coming in and when looking at my computer I see that the Atom shell is trying to connect to the serial port but failing.

Disconnecting / reconnecting then shows a SyntaxError message. Resetting the device resumes the operation.

Has anyone seen anything similar to this? Any ideas how to make it more robust? Could I setup a watchdog in the boot.py and then feed / disable it in my main.py? would it help or is it likely that the issue occurs earlier.

I've now connected it to an usb-charger in case there's something my computer does.

Any help / insights would be appreciated!

[Åke Forslund]

Having it plugged to an usb-charger instead of the computer's usb has kept it stable since I sent above message so maybe it was the USB port on my computer or possibly Atom causing the issue.