More supported displays

[jaybee79]

Is your feature request related to a problem? Please describe.

It's very hard to read the small displays supported actually by the project, especially for older people.

Describe the solution you'd like

I would suggest to add support for SPI dispays with the ILI9341 chipset. Displays with that chipset are available mostly in 240x320 or 320x480px and different sizes (for example 2.2, 2.4, 2.8, 2.3 or 3.5 inch), also touch versions are available.
That would give the possibility to display more values in bigger characters or even display a menu on the touch versions to do some settings on OpenDTU without using a computer.

Describe alternatives you've considered

Text based displays (2x16, 2x20, 4x20... characters) could be an option, as they offer bigger characters (also bigger character set that uses 2 rows of the display). They are available with I2C interface too (or with an adapter circuit that can be put on the backside. The problem there is that a bidirectional I2C voltage converter has to be used, as the 5V versions are easy to get and moch more cheaper than the 3,3V versions of that displays. That would add additional costs/components to the circuit.

Additional context

No response

[FireFly3390]

Bigger displays (any form) would be nice 👍