Dht 11 & dht 22

[DavidK]

I found these temperature/humidity devices on eBay and Sparkfun;DHT 11 & DHT 22. Did a search on this forum and did not see any postings. Was wondering if anyone has been working with them?? I did a Google search and lots of hits for Arduino but no Pic Basic.

[aerostar]

Do a search for humidity, there are some hits with SHT11

here is one

http://www.picbasic.co.uk/forum/showthread.php?t=888&pagenumber=

[DavidK]

SHT11 is a 2 wire device, the DHT11 & DGT22 are one wire, not to be confused with Dallas 1-wire.

Here is a link to the data sheet. The sample code looks like 8051 code, never studied that. http://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf

[lilimike]

Hi David,

Did you ever get around to do some development on the DHT11/22 ?
I've just purchased a bunch of both from eBay and I was hoping to study while I wait for my order.

Mike

[DavidK]

Mike
I have not done anything with this yet. Someone has done some PIC work here: http://embedded-lab.com/blog/?p=4333. The download includes a hex file for a 16F628. At least you can test the units to make sure they work.

David

[lilimike]

I saw this link, I will use this as a starting point and I will try to convert to PBP.

Thanks

Mike