Does the RHT02/DHT21 need a pull-up resistor?

Questions about Modern Device and JeeLabs Sensors
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djburke
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Joined: Sat Dec 07, 2013 9:12 am

Does the RHT02/DHT21 need a pull-up resistor?

Post by djburke » Sat Dec 07, 2013 9:19 am

Perhaps I haven't had enough coffee this morning, but it isn't obvious to me if the RHT02/DHT21 temperature/humidity sensor needs a pull-up resistor or not. It seems to work with one (I'm using 10K, based on the Lady Ada tutorial) but was hoping that it had one built in.

Thanks in advance, Doug

paul
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Joined: Mon May 12, 2008 4:19 pm

Re: Does the RHT02/DHT21 need a pull-up resistor?

Post by paul » Sun Jul 13, 2014 6:09 pm

You can also use built in pin pullups on micrcrocontrollers that support pin pullups,
e.g. most modern microcontrollers

Paul

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