<html><head></head><body><div class="ydpb887a8e2yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div dir="ltr" data-setdir="false"><span><pre style="white-space: pre-wrap; color: rgb(0, 0, 0);">Thanks, Alice, I only used Putty because that's what the website advised. It had given the advice to use sudo apt install putty so I just followed along.</pre><pre style="white-space: pre-wrap; color: rgb(0, 0, 0);">ls -l /dev/ttyACM0 produces</pre><pre style="white-space: pre-wrap; color: rgb(0, 0, 0);"><div><div>crw-rw---- 1 root dialout 166, 0 Feb 12 16:22 /dev/ttyACM0</div><div><br></div><div dir="ltr" data-setdir="false">I typed</div><div dir="ltr" data-setdir="false"><span><pre style="white-space: pre-wrap; color: rgb(0, 0, 0);">putty -serial /dev/ttyACM0</pre></span>and got a comms error. Unable to open connection/port.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Still puzzled </div><div><br></div></div><br></pre></span><br></div><div><br></div><div class="ydpb887a8e2signature">Rhys Sage</div></div></body></html>