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adafruit / Adafruit_CircuitPython_DHT

CircuitPython support for DHT11 and DHT22 type temperature/humidity devices
MIT License
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100% CPU usage because of PulseIO #42

Closed pepijndevos closed 4 years ago

pepijndevos commented 4 years ago

On my Raspberry Pi, I'm seeing 100% CPU usage from PulseIO.

The code mentions that it's using a continuously running process because "Linux is sluggish"

https://github.com/adafruit/Adafruit_CircuitPython_DHT/blob/b770bb45adcbd7a395fd2e09f323f0e17dd32530/adafruit_dht.py#L66-L67

However, this sensor is only read once every two seconds, so it seems a bit of sluggishness is in many cases preferable to a continuous 100% CPU usage.

Is using a context something that could be reconsidered? Am I missing something that makes this unworkable?

tannewt commented 4 years ago

See https://github.com/adafruit/Adafruit_Blinka/issues/210 for more discussion.

pepijndevos commented 4 years ago

Thanks for pointing that out.

Regardless of the underlying issue, using a context here works for me. So I'll be running a patched version until the underlying issue is resolved.