B4J Question Raspberry PI GPIO and DHT11 sensor with B4J

giggetto71 · Dec 16, 2016

Hi,
does anyone have some example on how to get temperature and humidity out of the DHT11 using Raspberry PI GPIO and B4J? I have seen some example with B4R but I am looking to the possibility to use RPi in this case.
thanks?

rwblinn · Dec 23, 2016

Not trivial to solve. One solution is to run a Python script and capture the output. This can be acomplished by using the adafruit dht11 libary.

Please find attached example containing the adafruit library and a B4J non-ui application. The B4J non-ui applications runs the python script and captures the output.
Solution successfully tested on a Raspberry Pi via the B4J Bridge. DHT11 connected to GPIO23.
Please read the readme.txt for the installation steps on the raspberry pi.

B4X:

Application Started with Argument: simpletest.py
Python Script successfully executed. Output:
Temp=17.0*C  Humidity=40.0%

There might be other solutions.

Good Luck.

giggetto71 · Dec 24, 2016

thanks! lots of things to digest! great for xmas holidays! thanks!!!!!

giggetto71 · Jan 1, 2017

rwblinn,
I have just finished to test your solution and it worked like a charm! THANKS!! I did not know how easy was to have B4J interacting with python. thanks!

B4J Question Raspberry PI GPIO and DHT11 sensor with B4J

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B4J Question Raspberry PI GPIO and DHT11 sensor with B4J

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