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<body><div>Hi Christian</div><div><br></div><div>Thank you for your generous offer. </div><div><br></div><div>I'm deep into other projects at the moment, so I woukd not feel comfortable when your hardware would be laying around at my place and I would not be spending the time with it it deserves.</div><div><br></div><div>And as Carsten now jumped in, there will be some good team testing.</div><div><br></div><div>So thank you again. I will be following the development with great interest and surely will step into this hardware somewhere in the future.</div><div><br></div><div>Success</div><div><br></div><div>Chris</div><div><br></div><div>Am Montag, dem 28.04.2025 um 15:16 +0000 schrieb Carsten Schmiemann via OvmsDev:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div><style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style></div><div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr"><p>Hi Christian,</p><p><br></p><p>really nice work, thanks.<br></p><p><br></p><p>I <span>immediately ordered 5 PCBs and will test it on my electric scooter from NIU which has a CAN bus and I did some reverse engineering already. Only the high price of an OVMS 3.3 module was holding me back :-)</span></p><p><span><br></span></p><p><span>Greetings from Germany</span></p><p><span>Carsten<br></span></p></div><div><hr style="display:inline-block;width:98%" tabindex="-1"></div><div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> OvmsDev <ovmsdev-bounces@lists.openvehicles.com> im Auftrag von Info Zeitnitz via OvmsDev <ovmsdev@lists.openvehicles.com><br><b>Gesendet:</b> Montag, 28. April 2025 14:24:32<br><b>An:</b> ovmsdev@lists.openvehicles.com<br><b>Cc:</b> Info Zeitnitz<br><b>Betreff:</b> Re: [Ovmsdev] Support for Lilygo T-Call based module</font><div> </div></div><div><div class="moz-cite-prefix">Hi Chris and Mark,<br>thanks for your positive responses.<br><br>The Simcom modem is already supported by my last PR, so no extra configuration required. This is independent from the hardware selection.<br><br>The currently used single config <span style="white-space: pre-wrap">CONFIG_OVMS_HW_BASE_LILYGO_1_0 takes care of 2 things: - Change the pin assignment of the ESP32 to match the Lilygo module and the motherboard - Reassign required signals of the GPIO extender
chip max7317 to ESP32 IO pins. This is only related to the powering of the modem. Thats all. The latter can easily be handled by an alternative config, if the max7317 is disabled. But there is the need to handle an alternative IO mapping in ovms_peripherals.h
and this is very specific for the Lilygo/motherboard combination. I do not care, whether this is handled as a separate HW version, or is achieved by just an additional optional config to rearrange pins. To keep it completely flexible, a free pin mapping could
be available via menuconfig or an extra file, but that might be too error prone. Concerning the availability of the hardware: at this stage, I will not be able to provide kits for this hardware option. Probably someone else is interested doing this? Chris,
if you are interested to test it, I could provide you with a partially assembled motherboard (most passive components and the DC/DC converter). As far as I see, you are located in Germany as well, so shipment would be no problem. Best regards Christian
</span><br><br><br>Am 27.04.2025 um 14:44 schrieb Mark Webb-Johnson via OvmsDev:<br></div><blockquote type="cite" cite="mid:C1356E2F-A196-4CC4-9310-7EAF8EC24F95@webb-johnson.net" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div dir="ltr">Chris,</div><div dir="ltr"><br></div><div dir="ltr">I guess if somebody wanted to, it could be available as an unsoldered kit of Pcb and parts. The problem with assembled kits is CE (and ROHS) certification for sale in EU, but unsoldered kits are generally considered exempted from that (although the radio / antenna part of it is a gray area).</div><div dir="ltr"><br></div><div dir="ltr">Regards, Mark</div><div dir="ltr"><br><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div>On Apr 27, 2025, at 3:03 PM, Chris van der Meijden via OvmsDev<a class="moz-txt-link-rfc2396E" href="mailto:ovmsdev@lists.openvehicles.com"><ovmsdev@lists.openvehicles.com></a> wrote:<br></div><div><br></div></blockquote></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div dir="ltr"><div>Hi Christian,</div><div><br></div><div>very impressive. You did a great job on the development and on the documentation.</div><div><br></div><div>It is good to have an alternative hardware option.</div><div><br></div><div>As you mentioned, it is a disadvantage that OTA is not possible, but that seems to be the price for a cheaper hardware. Other obstacles I see, is that the hardware seems only available directly from China and that we need to build our own motherboard. That is for me the greatest hurdle, alltough you did a great documentation with the Eagle schematics.</div><div><br></div><div>I would like to test your hardware approach, if the hardware would be available as a "ready to go" kit. Are you planning on providing such a kit?</div><div><br></div><div>I could definitly see this as part of the OVMS repository. Lets see what the other opinions on that are :-)</div><div><br></div><div>Regards</div><div><br></div><div>Chris</div><div><br></div><div>Am Samstag, dem 26.04.2025 um 17:40 +0200 schrieb Info via OvmsDev:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div>Hi,<br></div><div>I finished the implementation and documentation of the OVMS module based <br></div><div>on the Lilygo T-Call A7670E board (ESP32 WROVER E and a Simcom A7670E).<br></div><div>The module is in operation since more than a month in my Smart EQ.<br></div><div><br></div><div>The hardware details can be found here: <br></div><div><a href="https://github.com/zbchristian/OVMS-Lilygo-based-Module" moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/zbchristian/OVMS-Lilygo-based-Module</a><br></div><div><br></div><div>There are some limitations wrt the standard module:<br></div><div>- only 4MB Flash -> no OTA update<br></div><div>- no GPIO extender -> only 2 CAN buses<br></div><div>- no SD-card support<br></div><div><br></div><div>The required modification in the firmware:<br></div><div>- remapping of the ESP32 pins in ovms_peripherals<br></div><div>- replace some of the GPIO extender pins by standard ESP32 pins<br></div><div>- new hardware option in menuconfig (set CONFIG_OVMS_HW_BASE_LILYGO_1_0=y)<br></div><div>- Simcom 7670 modem support (already available in the OVMS repo)<br></div><div><br></div><div>All this is available in the branch lilygo-support of <br></div><div><a href="https://github.com/zbchristian/Open-Vehicle-Monitoring-System-3-Lilygo-Support" moz-do-not-send="true" class="moz-txt-link-freetext">https://github.com/zbchristian/Open-Vehicle-Monitoring-System-3-Lilygo-Support</a><br></div><div><br></div><div>My question to the main developers: Is there interest to incorporate <br></div><div>this into the official OVMS repository?<br></div><div><br></div><div>Best regards<br></div><div> Christian<br></div><div><br></div><div>_______________________________________________<br></div><div>OvmsDev mailing list<br></div><div><a href="mailto:OvmsDev@lists.openvehicles.com" moz-do-not-send="true" class="moz-txt-link-freetext">OvmsDev@lists.openvehicles.com</a><br></div><div><a href="http://lists.openvehicles.com/mailman/listinfo/ovmsdev" moz-do-not-send="true" class="moz-txt-link-freetext">http://lists.openvehicles.com/mailman/listinfo/ovmsdev</a><br></div></blockquote><div><br></div><div><span></span></div><span>_______________________________________________</span><br><span>OvmsDev mailing list</span><br><span><a class="moz-txt-link-abbreviated" href="mailto:OvmsDev@lists.openvehicles.com">OvmsDev@lists.openvehicles.com</a></span><br><span><a class="moz-txt-link-freetext" href="http://lists.openvehicles.com/mailman/listinfo/ovmsdev">http://lists.openvehicles.com/mailman/listinfo/ovmsdev</a></span><br></div></blockquote><div><br></div><div><fieldset class="moz-mime-attachment-header"></fieldset></div><pre wrap="" class="moz-quote-pre">_______________________________________________
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