user49956: Is there a way to connect a data output pin from an HT12D to an Arduino or ESP8266-12e input pin, then sense when the data pin is activated so I can have the Arduino or ESP8266-12e do something like turn on an output pin?

user68637: I am afraid I could not understand your question properly. But maybe, the answer is YES, if ...
First of all, OUTPUT pins, cannot be turned ON and turned OFF, however, you can start or stop READING that particular OUTPUT PIN based on another INPUT pin value.
If you want to connect HT12D decoder to any arduino or ESP, you must be aware to use same voltage level between IO PINS, a good approach is to use a I2C bi-directional level shifter.
if(INPUT_PIN_VALUE >= SOME_VALUE)
{
   digitalRead(PIN)
}


49956: <p>Is there a way to connect a data output pin from an HT12D to an Arduino or ESP8266-12e input pin, then sense when the data pin is activated so I can have the Arduino or ESP8266-12e do something like turn on an output pin?</p>
 68637: <p>I am afraid I could not understand your question properly. But maybe, the answer is YES, if ...</p>
<p>First of all, OUTPUT pins, cannot be turned ON and turned OFF, however, you can start or stop READING that particular OUTPUT PIN based on another INPUT pin value.</p>
<p>If you want to connect HT12D decoder to any arduino or ESP, you must be aware to use same voltage level between IO PINS, a good approach is to use a I2C bi-directional level shifter.</p>
<pre><code>if(INPUT_PIN_VALUE &gt;= SOME_VALUE)
{
   digitalRead(PIN)
}
</code></pre>
