d to decode NMEA message. Is it not Unicode?&quot;</span><span class="p">)</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">last_failed_read_log_time</span> <span class="o">=</span> <span class="n">now</span>
            <span class="k">return</span> <span class="kc">None</span>

        <span class="k">if</span> <span class="s1">&#39;$&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">raw_data</span><span class="p">:</span>
        