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In this tutorial, we will be showing you how to use the DHT11 Humidity and Temperature sensor with your Raspberry Pi. 
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Earlier we have setup the Cayenne with Raspberry Pi and controlled a LED using Cayenne Dashboard. Here, in this project we are going to monitor the temperature and humidity data over the Cayenne dashboard using DHT11 with Raspberry Pi. To publish data to Cayenne dashboard python MQTT library will be used and to read data from DHT11 sensor Adafruit DHT sensor library will be used.
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DHT11 (Raspberry Pi): How to setup a DHT11 sensor to read Temperature and Relative Humidity on the Raspberry Pi.
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In this lesson, we'll introduce how to use Raspberry Pi to get data from DHT11 Temperature and humidity sensor module .
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From
fpaez
En este nuevo tutorial vamos a aprender a leer los valores de temperatura ambiente y humedad relativa que nos proporciona el sensor DHT11. Este sensor tiene un precio muy económico y resulta ideal para pequeños proyectos con Raspberry Pi o Arduino.
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Temperature and Humidity are the most common parameters that are being monitored in any environment. There are tons of sensors to choose from for measuring temperature and humidity, but the most used one is the DHT11 due to its decent measuring range and accuracy. It also works with one pin communication and hence is very easy to interface with Microcontrollers or Microprocessors. In this tutorial we are going to learn how to interface the popular DHT11 sensor with Raspberry Pi and display the value of temperature and humidity on a 16x2 LCD screen. We already used it to build IoT Raspberry Pi Weather Station.
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From
peppe8o
Getting environment conditions is the first and simpler task required to create more complex electronic automations. Raspberry PI with DHT11 sensor can get tempreature and humidity values with cheap pieces
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Con una Raspberry Pi y algunos sensores, es fácil medir la temperatura sin mucho esfuerzo. Además, la humedad en ciertas situaciones o proyectos (como una estación meteorológica) puede ser un dato importante que necesitas medir. Sensores como el DHT11 y el DHT22 no sólo están disponibles por unos pocos euros, sino que también pueden medir la temperatura y la humedad.
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The DHT11 temperature and humidity sensor is a nice module that provides digital temperature and humidity readings. It’s really easy to set up. The module is actually a PCB that has a 4-pin DHT11 sensor soldered with a few components, and it is a 3-wire module: VCC, GND and DATA.
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In this project, we will get temperature and humid data from DHT11 and send it to Raspberry Pi, then display the temperature and humid on 16x2 LCD screen. If you don’t know what is GPIO layout, check our tutorial How to read Raspberry Pi i/o pin diagram (GPIO pin graph)
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With the Raspberry Pi and some sensors, it is easy to measure the temperature without much effort. In addition, however, the humidity in certain situations or projects (such as a weather station) can be enlightening. Sensors such as the DHT11 and DHT22 are not only available for a few euros, but they can also measure the temperature as well as the humidity.
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