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How can Greehouse example use DHT11 to read temperature and humidity data? [message #1767774]

Tue, 11 July 2017 02:53

LI Yi

Messages: 37
Registered: June 2017

Member

Hello Everyone
My DHT 11 sensor module has three pins ,which are VCC/DATA/GND，and integrate the temperature and humidity sensor together.
The sensor of greenhouse example have four pins. How can i use my sensor to replace the sensor used in examle? Thank you very much !

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Re: How can Greehouse example use DHT11 to read temperature and humidity data? [message #1768134 is a reply to message #1767774]

Thu, 13 July 2017 22:57

David Woodard

Messages: 420
Registered: July 2014

Senior Member

Hello,

Sorry for the slow response. The sensor used in the published greenhouse demo uses the I2C bus of the Raspberry Pi. The DHT 11 sensor uses a single digital output. So, you would have to modify the source code of the project to use a single GPIO pin as opposed to the I2C bus. Let me know if you are interested in doing this and I can help get you started.

Thanks,
--Dave

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