From info at zeitnitz.eu Sat May 3 21:09:35 2025 From: info at zeitnitz.eu (Christian Zeitnitz) Date: Sat, 03 May 2025 15:09:35 +0200 Subject: [Ovmsdev] Support for Lilygo T-Call based module In-Reply-To: References: <89f59fe5e4a096b0ed7c684466bc459806b3c309.camel@arachnon.de> ,

Message-ID: <19696443698.27f4.27db515bfc7723fd208727957da61590@zeitnitz.eu> Hi Chris and Casten, ok, very good. Carsten, if you experience any problems, please get in touch with me. Best regards. Christian Am 29. April 2025 07:10:22 schrieb Chris van der Meijden via OvmsDev : > Hi Christian > > Thank you for your generous offer. > > 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. > > And as Carsten now jumped in, there will be some good team testing. > > So thank you again. I will be following the development with great interest > and surely will step into this hardware somewhere in the future. > > Success > > Chris > > Am Montag, dem 28.04.2025 um 15:16 +0000 schrieb Carsten Schmiemann via > OvmsDev: >> >> Hi Christian, >> >> >> >> >> really nice work, thanks. >> >> >> >> >> >> I 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 :-) >> >> >> >> >> Greetings from Germany >> >> Carsten >> >> Von: OvmsDev im Auftrag von Info >> Zeitnitz via OvmsDev >> Gesendet: Montag, 28. April 2025 14:24:32 >> An: ovmsdev at lists.openvehicles.com >> Cc: Info Zeitnitz >> Betreff: Re: [Ovmsdev] Support for Lilygo T-Call based module >> Hi Chris and Mark, >> thanks for your positive responses. >> >> The Simcom modem is already supported by my last PR, so no extra >> configuration required. This is independent from the hardware selection. >> >> The currently used single config 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 >> >> >> >> Am 27.04.2025 um 14:44 schrieb Mark Webb-Johnson via OvmsDev: >>> Chris, >>> >>> 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). >>> >>> Regards, Mark >>> >>>> On Apr 27, 2025, at 3:03?PM, Chris van der Meijden via >>>> OvmsDev wrote: >>>> Hi Christian, >>>> >>>> very impressive. You did a great job on the development and on the >>>> documentation. >>>> >>>> It is good to have an alternative hardware option. >>>> >>>> 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. >>>> >>>> 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? >>>> >>>> I could definitly see this as part of the OVMS repository. Lets see what >>>> the other opinions on that are :-) >>>> >>>> Regards >>>> >>>> Chris >>>> >>>> Am Samstag, dem 26.04.2025 um 17:40 +0200 schrieb Info via OvmsDev: >>>>> Hi, >>>>> >>>>> I finished the implementation and documentation of the OVMS module based >>>>> >>>>> on the Lilygo T-Call A7670E board (ESP32 WROVER E and a Simcom A7670E). >>>>> >>>>> The module is in operation since more than a month in my Smart EQ. >>>>> >>>>> >>>>> The hardware details can be found here: >>>>> >>>>> https://github.com/zbchristian/OVMS-Lilygo-based-Module >>>>> >>>>> >>>>> There are some limitations wrt the standard module: >>>>> >>>>> - only 4MB Flash -> no OTA update >>>>> >>>>> - no GPIO extender -> only 2 CAN buses >>>>> >>>>> - no SD-card support >>>>> >>>>> >>>>> The required modification in the firmware: >>>>> >>>>> - remapping of the ESP32 pins in ovms_peripherals >>>>> >>>>> - replace some of the GPIO extender pins by standard ESP32 pins >>>>> >>>>> - new hardware option in menuconfig (set CONFIG_OVMS_HW_BASE_LILYGO_1_0=y) >>>>> >>>>> - Simcom 7670 modem support (already available in the OVMS repo) >>>>> >>>>> >>>>> All this is available in the branch lilygo-support of >>>>> >>>>> https://github.com/zbchristian/Open-Vehicle-Monitoring-System-3-Lilygo-Support >>>>> >>>>> >>>>> My question to the main developers: Is there interest to incorporate >>>>> >>>>> this into the official OVMS repository? >>>>> >>>>> >>>>> Best regards >>>>> >>>>> Christian >>>>> >>>>> >>>>> _______________________________________________ >>>>> >>>>> OvmsDev mailing list >>>>> >>>>> OvmsDev at lists.openvehicles.com >>>>> >>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev >>>> >>>> >>>> _______________________________________________ >>>> OvmsDev mailing list >>>> OvmsDev at lists.openvehicles.com >>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev >>> >>> >>> _______________________________________________ >>> OvmsDev mailing list >>> OvmsDev at lists.openvehicles.com >>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev >> >> _______________________________________________ >> OvmsDev mailing list >> OvmsDev at lists.openvehicles.com >> http://lists.openvehicles.com/mailman/listinfo/ovmsdev > > > _______________________________________________ > OvmsDev mailing list > OvmsDev at lists.openvehicles.com > http://lists.openvehicles.com/mailman/listinfo/ovmsdev -------------- next part -------------- An HTML attachment was scrubbed... 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