I purchased a classroom set of Circuit Playground Express boards about 4 months ago for Unit 6. As we approach Lesson 7, I have noticed that the boards are not returning valid temperature and sound sensor data, and they do not respond to changes in environment that should cause changes in output. Is this a known issue, or do I need to contact Adafruit about the possibility of some bad boards? I have tested three boards and they are all returning similar data and none respond to temperature or sound pressure changes.
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