Wireless transmission of RS232 interface signal based on ZigBee

RS232 interfaces are widely used in data transmission, such as wireless meter reading, digital image transmission, industrial data collection, cell paging, fire-proof system, radio frequency identification card, local alarm system, and so on. Since the longest distance of cable transmission is only 15 meters, so it is important to develop a kind of RS232 interface used for wireless transmission. ZigBee is a new and popular protocol for wireless communication because of its low power assumption, large network capacity and the ability to organize a network automatically. The scheme of converting RS232 signal into wireless signal is introduced. MAX232 is used to connect RS232 interface with ZigBee module, and CC2430 with internal C51 is used to be programmed for wireless communication.