Clothing etiquette or dress code for IEEE conferences?

I’m attending an IEEE conference (ICASSP in India) for the first time in my life. I’m not an author or a presenter, just an attendee. What is the dressing norm for such conferences?

Here’s what I wear everyday for work:
1. Graphic tees, tees with printed text, hoodies, shirts with floral patterns, basic smart casual shirts
2. Jeans (not ripped), chinos, track pants, shorts
3. Casual shoes, flip flops, slippers

I have no formals and just 1 or 2 smart casual shirts, but the conference goes for a week, so I’ll have to be buying new clothes depending on your responses. Please let me know, thanks in advance!