Received IndexError instead of SensorNotReadyError from get_raw_sensor_strings() when reading DS18B20

I am having a few DS18B20 sensors connected to raspberry pi zero. From time to time the contents of the file /sys/bus/w1/devices/28.../w1_slave appears to be empty (not sure why). Hence the contents of the list data in the method get_raw_sensor_strings() in file async_core.py is empty as well. Accessing it raises an IndexError.

Changing line 65 in file async_core.py from:

     if (
            data[0].strip()[-3:] != "YES" or "00 00 00 00 00 00 00 00 00" in data[0]
        ):  # pragma: no cover
            raise SensorNotReadyError(self) 

to

     if (
           not data or data[0].strip()[-3:] != "YES" or "00 00 00 00 00 00 00 00 00" in data[0]
        ):  # pragma: no cover
            raise SensorNotReadyError(self) 

resolves the problem.

Thanks.

PS: I am using version w1thermsensor 2.0.0a1

[timofurrer]

I’ve released v2.0.0a2

[timofurrer]

Thanks for the report. We’ve already fixed that for the non-async version of the code, see #94 .

I’ve made the same change now in the async code and will release asap.