e measurement, DC (direct current)”.</p>
<h2 id="setting-an-output-pin-signal">Setting an output pin signal</h2>
<p>To set the pin high and low, alternatingly, with a 5 second frequency, we will
be using the <code>hello-gpio</code> program, which is a slightly modified version of the
example at <a href="https://periph.io/device/led/">periph.io/device/led</a>:</p>
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