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AM2301, DS18B20, si7021

Hello All, So we have a great selection of sensors for the TH10 & 16 but what are the main differences? I understand that AM2301 (temperature & humidity) , DS18B20 (temperature) & si7021 (temperature & humidity). But what are the main differences between AM2301 & si7021? Thanks in advance, MOA.

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How do I know what sensor to by for my TH16?

I remember reading somewhere that the Si7021 was more accurate although I can't find where I read that and there was nothing to back it up.

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