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

Mon, 10 July 2017 22:53

Eclipse User

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 !

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 18:57

Eclipse User

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

Re: How can Greehouse example use DHT11 to read temperature and humidity data? [message #1768159 is a reply to message #1768134]

Fri, 14 July 2017 04:44

Eclipse User

I have replaced the source code by the example here,
https://github.com/Manoj-red-hat/org.eclipse.kura.DHT11/blob/master/workspace/kura/org.eclipse.kura.DHT11/src/org/eclipse/kura/DHT11/DHT11Sensor.java

but i have no idear how to config the cloud and MQTT, so i can get the temperature and humidity from WEB UI, or MQTT client?
Any advices are appreciated!!

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