[Ovmsdev] New to OVMS development

[Michael Balzer]

Christian, welcome :-)

no idea if we need PPP for additional error detection, as we cannot use 
hardware flow control between the ESP32 and the modem on the OVMS board, 
or if direct TCP/IP would actually perform better due to less packet 
overhead. Mark can better comment on this.

Nevertheless, the addition of support for the SIMCOM 7670 certainly 
would be valuable, and support for a different hardware base is also 
quite interesting.

Regarding additions to the Smart EQ adapter, please submit these as 
separate pull requests -- I assume they can be merged right away without 
taking your low level mods into account.

If not yet done, consider contacting the Smart maintainer Thomas Heuer 
(@Dimitrie78 on github, also present here on the list) to coordinate 
your efforts.

Regards,
Michael


Am 23.01.25 um 12:29 schrieb Info Zeitnitz via OvmsDev:
> Hi everyone,
> my name is Christian and I started some time ago to adapt the OVMS 
> firmware to my hardware.
>
> The hardware is a Lilygo T-Call A7670E V1.0 board (ESP32 Wrover-E, 4G 
> modem Simcom 7670E, 4MB Flash, 8MB PSRAM) mounted on a custom PCB 
> providing power, two CAN bus transceivers  and 1 MCP2515. No extension 
> chip is implemented.
>
> I use this to connect to my Smart EQ, which actually needs only a 
> single CAN bus.
>
> I got the firmware going, including the 4G modem and its running 
> reasonably stable, even though the Lilygo board has only 4MB of Flash 
> (had to disable OTA and some other components). It works with both 
> server versions.
> This firmware is based on the Version 3.3-004 tagged in the Github 
> repo. I had to modify the code to get it working without the extension 
> and with the Simcom 7670 module. In addition I added some changes from 
> the master branch, especially for the Smart EQ.
>
> I would be willing to share some of the mods I did to the code and 
> contribute to the further development.
> Especially the cellular code, which is still utilizing PPP, could 
> benefit from an update to TCP/IP. I actually had quite a hard time to 
> get the modem going with PPP, since the Simcom 7670 does not 
> understand all the used AT-commands.
>
> So, I hope for a productive collaboration.
>
> Best regards
>    Christian
>
>
> _______________________________________________
> OvmsDev mailing list
> OvmsDev at lists.openvehicles.com
> http://lists.openvehicles.com/mailman/listinfo/ovmsdev

-- 
Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926

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