Using the cho45¡¯s web interface can use nanoVNA very good on the phone , I think this is a very good expansion screen scheme. I'm also trying a 3.5-inch LCD, maybe working with the STM32F303 to create a new NanoVNA, and I want to be as consistent as possible with the NanoVNA for better community support. NanoVNA-F is a very good project to use a larger LCD, but it uses the expensive MDK compiler.
Thank You£¡
hugen