More I2C addresses

[Mandrake-Lee]

Hi,
I've been using this module with a Raspberry CM3+ and a custom board.

The MCP4725 chips that I have are at addresses 0x62 (=98) and 0x63(=99). This depends on the chip itself not the external pin.

Therefore I had to tune your code to reach them.

Reading the datasheet, last page 47, we can notice that actual I2C addresses can range from 96 to 103.

Therefore my suggestion is to add all those in the drop down list to make this module more universal.

I'd like also to suggest more detail in the help regarding the address. It took me some time to realise that address is in decimal notation, not hex as it is more common.

Thanks for your work