At the moment the microSD can only be used for uploading your TFT into Nextion space.
Your TFT file will be limited to the maximum size supported by your Nextion
- this will be equal to your SPI flash size.
There is a feature request being considered for expanding future usage.
Please also refer to the Announcement section
- Nextion FAQs and Nextion user manual (updating)
what error can be when we get on the screen file is too large for the destination device when we do it with microSD and when we do it with usb-serial connection Connection failed
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