22:44 Unknown
GPIO pins:
GPIO stands for general purpose input output pin, there are 40 pins available in
the raspberry pi 3 model b.
which are used to control the external devices such as light,fan,motor
and any electrical and electronic devices using the solid state relay module
for the high voltage devices.
It can be used to read the data from the sensor node such as temporature,
humidity,distance,ph value, moisture content and store to the database server,
then process these data for the further analysis.
Gpio pins of the raspberry pi 3 is show in the pic.
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