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What is raspberry sensor?

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There are (if I remember correctly) about 26 GPIO pins on the RPi 2, so you can get 26 sensors at least. However, remember that the Dallas one-wire sensors such as the DS18B20 allow several of the same device to be connected to the same pin. They use an in-built serial number to distinguish devices.Sep 8, 2015');})();(function(){window.jsl.dh('_u5h0YNfNLNCX-gTbwYjABw47','
2. Step \u2013 Connect sensor to Raspberry Pi.
  1. Connect GND pin of the Sensor with GND pin of the Raspberry PI.
  2. Connect VCC pin of the Sensor with 5V/3.3V pin of the Raspberry PI (see sensor documentation)
  3. Connect DO pin with GPIO pins, which you set in GPIO configuration page of the R PIHome.
Jul 2, 2015
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Sensors are another type of input that can be connected to the Raspberry Pi. They may gather data about, for example, light or temperature conditions, but fundamentally they work in a similar way to the push button: they provide different input to the Pi depending on something that is happening externally.

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