<div dir="ltr"><div>I also purchased a $24 Baofeng from Amazon, and then faked up a cable and got it to communicate with CHIRP under Linux. I think I made every possible mistake first, so after you are sure Linux has recognized your USB cable, check the following:<br></div><div>1) Push the plugs in to the radio really hard. If there is still an air gap, it's not in far enough</div><div>2) Tune the radio to an unused channel and set the squelch. Apparently, the serial signal on the cable is shared with the speaker signal.</div><div>3) turn the volume all the way up. (see 2 above).</div><div>I found these instructions in the CHIRP setup messages for the radio.</div><div><br></div><div>My faked cable simply connects the 3.3V serial port TxD and RxD from my Raspberry Pi GPIO via 2k resistors, and GND, to the proper plug pins on the Baofeng: no USB at all. This works because Baofeng uses 3.3V serial. This is NOT a serial standard but has become a de facto standard for modern CMOS direct serial connections. In addition to converting USB to serial, a programming cable also converts to the proper voltages plug pinouts for the specific radios the cable is specified for.<br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Jan 13, 2019 at 9:59 AM D.J.J. Ring, Jr. <<a href="mailto:n1ea@arrl.net">n1ea@arrl.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">Yes, do try pushing the cable into your radio with more force, there is an issue of some cables not fitting the radio very well. <br><br>I forgot about this, otherwise proceed to my message about seeing if you're in the right group in your Ubuntu installation.<br><br>This is a normal usual step, often people do not read the various pages explaining how to install CHIRP.<br><br>CHIRP has such a page:<span class="gmail_default" style="font-size:large"> <a href="https://chirp.danplanet.com/projects/chirp/wiki/Running_Under_Linux" target="_blank">https://chirp.danplanet.com/projects/chirp/wiki/Running_Under_Linux</a></span></div><div dir="ltr"><font size="4"><br></font></div><div dir="ltr"><font size="4"><span class="gmail_default" style="font-size:large">It also says under Ubuntu the serial ports are in group "dialout" and tells you how to get your user into that group. Don't change </span> "$USERNAME" <span class="gmail_default" style="font-size:large">that's just a universal shortcut for the user's username.</span></font></div><div dir="ltr"><font size="4"><span class="gmail_default" style="font-size:large"></span></font></div><div dir="ltr"><font size="4"><span class="gmail_default" style="font-size:large">In terminal do this: </span></font>sudo addgroup "$USERNAME" dialout </div><div dir="ltr"><font size="4"><span class="gmail_default" style="font-size:large"></span><br></font><br><font size="4"><b>serial port permissions<br></b></font><br>Note that you may need to adjust permissions on the /dev/tty(something) device, or add your users who want to use Chirp to the "dialout" group in order to let non-privileged users access the serial device.<br><br>This issue is often indicated by an "access denied" error when accessing serial port.<br><br>On most Linux distros this is accomplished with:<br><br>sudo addgroup "$USERNAME" dialout <br><br>You will then need to log out and back in for it to take effect. </div><div dir="ltr"><br></div><div dir="ltr"><div class="gmail_default" style="font-size:large">Regards,</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">David</div><br></div></div></div>
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