RS232 and RS485 have always been the common interfaces of weak current. The two serial ports have a lot of basic knowledge, including electrical characteristics, mechanical characteristics, link layer, transmission control and other aspects, this article will compare two common interfaces from a simpler perspective and from the differences between the two sides. And from the current practical point of view, such as RS232 and RS485 conversion, and USB conversion, etc.
ARM-based embedded android playbox with simplified instruction sets often have more amazing performance in specific aspects such as playback capability and computing speed. In recent years, Shiningltd, which focuses on the intelligent retail industry, has grasped the trend of the industry and independently developed android player box with ARM architecture to meet the needs of embedded products in different commercial environments.