TEMPERATURE & HUMIDITY SENSOR

<div style=”box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, Heiti; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>The DHT11 digital temperature and humidity sensor is a temperature and humidity composite sensor with a calibrated digital signal output. It uses dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure high reliability and excellent long-term stability. The sensor consists of a resistive wet sensor and an NTC temperature sensor connected to a high performance 8-bit microcontroller. Therefore, the product has the advantages of excellent quality, ultra-fast response, strong anti-interference ability and high cost performance. Each DHT11 sensor is calibrated in an extremely accurate humidity calibration chamber. The calibration coefficients are stored in the OTP memory as a program, and these calibration coefficients are called internally during the processing of the detection signal. The single-wire serial interface makes system integration easy and fast. Ultra-small size, extremely low power consumption, and signal transmission distances of up to 20 meters make it the best choice for even the most demanding applications. The product is available in a 4-pin single-row lead package.</span></span></span></div>

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<div style=”box-sizing: content-box; color: rgb(0, 0, 0); font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-serif, Heiti; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; font-weight: 700;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>Product Features:</span></span></span></span></div>

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<ul>
<li>3 to 5V power and I/O</li>
<li>2.5mA max current use during conversion (while requesting data)</li>
<li>Good for 20-80% humidity readings with 5% accuracy</li>
<li>Good for 0-50&deg;C temperature readings &plusmn;2&deg;C accuracy</li>
<li>No more than 1 Hz sampling rate (once every second)</li>
<li style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>No extra parts required</span></span></span></li>
<li style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>Extra long signal transmission distance</span></span></span></li>
<li style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>Ultra low energy consumption</span></span></span></li>
<li style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>4-pin mounting</span></span></span></li>
</ul>

<p style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”>​<strong>Reference Connection:</strong></span></span></span></p>

<p style=”box-sizing: border-box; margin-left: 0px;”><span style=”font-family:arial,helvetica,sans-serif;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; font-size: 14px; border-width: 0px; border-style: initial; border-color: initial; vertical-align: baseline; padding: 0px; margin: 0px;”><span style=”box-sizing: content-box; max-width: 100%; word-break: break-word; border-top: 0px; vertical-align: baseline; border-bottom: 0px; padding: 0px; border-left: 0px; margin: 0px;”><img alt=”” src=”https://www.online-components.com.my/image/onlinecomponents/image/data/Eoh0YpT11566196739.png” style=”width: 600px; height: 278px;” /></span></span></span></p>

<p>#include &lt;dht.h&gt;</p>

<p>dht DHT;</p>

<p>#define DHT11_PIN 7</p>

<p>void setup(){<br />
&nbsp; Serial.begin(9600);<br />
}</p>

<p>void loop()<br />
{<br />
&nbsp; int chk = DHT.read11(DHT11_PIN);<br />
&nbsp; Serial.print(&quot;Temperature = &quot;);<br />
&nbsp; Serial.println(DHT.temperature);<br />
&nbsp; Serial.print(&quot;Humidity = &quot;);<br />
&nbsp; Serial.println(DHT.humidity);<br />
&nbsp; delay(1000);<br />
}</p>
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