I completed creating firmware of my nova. My simple workflow is that user can enter query by typin gin TFT screen keyboard or user camera capture to get query by image.

My basic code structure is like.

void setup ():- Starts the shared SPI bus, initializes the screen and touch controller, connects to Wi-Fi, starts the camera, then draws ai bot UI.

Void loop():- Checks for touches in touch screen.

Rest are functions for each tasks like connecting to wifi, initialising camera takes photos etc.