Raw API use of Gravity Color Display (DFR0997)

Hi Folks,

I would like to use the DFR0997 I2C/UART display with something that is not an Arduino or Microbit, for which libraries have been provided.

Is there a reference on how to communicate with it at the low level (UART/I2C) to make it display stuff please?

Also, it has a USB-C for firmware updates: where can I get the latest firmware please?

Thanks!