Add support for Lolin C3 mini

[CheeseE]

Adding support for Lolin C3 mini: link
This board is pin to pin compatible with the old D1 mini. No need to cut the enclosure when upgrading from old gateways, and because of the low power RISC-V CPU it can be still powered from EMS bus.

[proddy]

what is the reason behind adding this?

[CheeseE]

It's interesting because this was causing compile issues for me even without any modification. (src/emsdevice.cpp:771:78: error: call of overloaded 'render_value(char [10], int, int)' is ambiguous) I'm using the 5.1.1 version of the espriff 32 lib.

[proddy]

and also what is the reason behind adding these two casts?

[CheeseE]

same as above

[proddy]

looks ok, I've added a comment. @MichaelDvP do you want to review too?

[MichaelDvP]

Nice that C3 works with little changes.
The C3 is set on compile-time, but the board-profile can changed in settings to a non-C3, Is this usefull? Also on ESP32 the C3 can be selected.
I think it's better to fix board in cpp code to C3 mini and in webcode disable selection box if C3Mini is set in program, otherwise dont add C3Mini to selection box.

[CheeseE]

Nice that C3 works with little changes. The C3 is set on compile-time, but the board-profile can changed in settings to a non-C3, Is this usefull? Also on ESP32 the C3 can be selected. I think it's better to fix board in cpp code to C3 mini and in webcode disable selection box if C3Mini is set in program, otherwise dont add C3Mini to selection box.

Hi Michael,
Thanks for the comment.
Do you know how to use compile time env vars in TS? So that I can export the board profiles list based on the board type/env type.

[MichaelDvP]

I think of something like removing C3MINI from types and modify `SettingsApplication.tsx to:

        <ValidatedTextField
          name="board_profile"
          label={LL.BOARD_PROFILE()}
          value={data.board_profile}
          disabled={processingBoard || data.board_profile === 'C3MINI'}
          variant="outlined"
          onChange={changeBoardProfile}
          margin="normal"
          select
        >
          {boardProfileSelectItems()}
          {data.board_profile === 'C3MINI' && (
            <MenuItem key={'C3MINI'} value={'C3MINI'}>
              C3 Mini
            </MenuItem>
          )}
          <Divider />
          <MenuItem key={'CUSTOM'} value={'CUSTOM'}>
            Custom&hellip;
          </MenuItem>
        </ValidatedTextField>

Than fix in cpp the board_profile to C3MINI.

But there are also other ways to check. You can simply not show the complete ValidateTextField.

[proddy]

Also @CheeseE we'll be pushing the dev branch to main soon so suggest this PR goes into the next dev build. just a FYI

[proddy]

@CheeseE can you merge your change into the latest dev and ammend the PR?