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Forum Index : Microcontroller and PC projects : DHT22 possible?

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cwilt
Senior Member

Joined: 20/03/2012
Location: United States
Posts: 147

Posted: 05:32pm 16 Jul 2013

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I was thinking about creating a driver for DHT22 but after reading the datasheet I don't think its possible.

Since the communications are not typical 1 wire then I would have to measure the high and low times in microseconds to read data. MMbasic clock is only in milliseconds.
Any suggestions, or is it just not possible?

kiiid

Guru

Joined: 11/05/2013
Location: United Kingdom
Posts: 671

Posted: 05:41pm 16 Jul 2013

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That would be difficult indeed.
Maybe an easy workaround would be go get it connected to a cheap intermediate receiver, something like a PIC10, which will send then data through a normal UART TX line (emulated). That shouldn't be a challenge.

http://rittle.org

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cwilt
Senior Member

Joined: 20/03/2012
Location: United States
Posts: 147

Posted: 07:34pm 16 Jul 2013

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Of course I could put a pic in the middle but thats the easy way out.

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