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Mark,<br>
<br>
1. I had the impression we've had more than expected "modem
not/stopped working" issues. Is that impression wrong, or didn't
those cases share a hardware cause? I was wondering if that could be
related to a voltage regulator issue (e.g.
<a class="moz-txt-link-freetext" href="https://www.openvehicles.com/node/2855">https://www.openvehicles.com/node/2855</a>).<br>
<br>
2. Any chance to fix the missing HW flow control on the modem UART
connection?<br>
<br>
3. Will v3.3 automatically be built using the latest ESP32 WROVER,
i.e. with the revision 3 ESP32 including the hardware SPIRAM fix?<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 17.08.21 um 07:30 schrieb Mark
Webb-Johnson:<br>
</div>
<blockquote type="cite"
cite="mid:2500E21B-0833-402F-99D5-A88C6A52DCF9@webb-johnson.net">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
For the 4G modem options we need to go through FCC, CE, and ROHS
certification. Minimising/eliminating the changes to the main
board simplifies this (and brings down the exorbitant costs) but
if there is anything urgent / necessary, now is the time to do it.
<div class=""><br class="">
</div>
<div class="">
<div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"
class="">The goal here is to maintain 100% compatibility with
existing OVMS main boards, to keep this is a simple and
relatively cheap upgrade of the modem board.</div>
</div>
<div class=""><br class="">
</div>
<div class="">So far, I have come up with this minimal list:</div>
<div class=""><br class="">
</div>
<div class="">
<ol class="MailOutline">
<li class="">Main board v3.3: Improve soldering of micro USB
port. Bigger solder pads, and more solder to secure it
better.<br class="">
<br class="">
</li>
<li class="">Modem board v1.3: Add support for SIM7600 module.<br
class="">
<br class="">
</li>
<li class="">Modem board v1.3: Fix support for DTR sleep/awake
support.</li>
</ol>
</div>
<div class=""><br class="">
</div>
<div class="">Is there anything else required for this update?</div>
<div class=""><br class="">
</div>
<div class="">Regards, Mark.</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
Fon 02333 / 833 5735 * Handy 0176 / 206 989 26</pre>
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