I can't bear to look at a dialed person walking away.
I used to study this kind of thing, like a single-chip TCP / IP protocol stack, USB interface, and GPRS, there are many. That is, these is technology, it is high-tech. In fact, the old ancient TCP development board can be bought, and you can get your hand a week. Old Week's USB board, 300 yuan, cheaper than making a plate. GPRS, manufacturers also have DEMO boards, which can be used. So these are not a core technology, not only you will, and others will not. Developing a product if these things are destined as the core technology is destined to walk into the dead alley. Technology can only be selling points! The real core is to meet the needs of users. On this basis, use new technologies to do something to add, to meet the vanity of customers. This is the right way!
