http://www.jacobzelek.com/tags/gpredict/ Recent content in Gpredict on Jacob Zelek - WQ6P Hugo en Sun, 02 Aug 2026 00:00:00 +0000 http://www.jacobzelek.com/posts/gpredict-rigctld-ic7100/ Sun, 02 Aug 2026 00:00:00 +0000 http://www.jacobzelek.com/posts/gpredict-rigctld-ic7100/ <p>I wanted Gpredict to drive my IC-7100 automatically during satellite passes, handling both Doppler correction and mode switching without me riding the VFO by hand. Gpredict doesn&rsquo;t talk to radios directly; it hands rig control off to Hamlib&rsquo;s <code>rigctld</code>, which sits between Gpredict and the radio over CI-V. Here&rsquo;s how I got the two talking on Linux.</p> <h3 id="find-the-hamlib-model-number"> Find the Hamlib model number <a class="heading-link" href="#find-the-hamlib-model-number"> <i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i> <span class="sr-only">Link to heading</span> </a> </h3> <p>Hamlib needs to know which model you&rsquo;re using. List the supported rigs and grep for the IC-7100:</p>