I think the actual max speed of the SPI host is 20 MHz, I never got anything higher to work. 20 MHz is my current config and works fine with all SD cards I tested. Joshua Jung reported an issue with SD cards, that was resolved by a hardware replacement (I assume he meant replacing the module): https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/1107 So there may be a hardware issue with some modules. Regards, Michael Am 23.03.25 um 04:52 schrieb Michael Geddes via OvmsDev:
I while ago I was talking about issues with my SDCard, and I've just had a friend have some similar issues. Both these issues were fixed with setting the max frequency to 15MHz config set sdcard maxfreq.khz 15000
This does end up making things a bit slower, but at least it works. The reported max of my card is 25Mhz. I'm concerned that the default is misbehaving. Is this a software issue? or is it a hardware issue?
//.ichael
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