Our company has a product to obtain a utility
model patent, < > film keyboard controller and RS485 bus based on Modbus
protocol, then our company obtained a total of 18 patents, expounds the
technical scheme of the invention, should be combined with the flow chart,
principle, circuit diagram, system structure diagram shows the realization of
each (a function of invention must have the corresponding technical scheme; all
drawings should have a detailed text description; patent method should provide
the flow chart, and provide system related)