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-Suppo...
My question to the main developers: Is there interest to incorporate this into the official OVMS repository?
Best regards Christian
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