Data Transceiver with Multi-serial-port Based on STC10F04EX

In order to transmit the data of water quality,a multi-serial-port transceiver system is established,which adopts a new 1T cyclical MCU STC10F04EX as a core component,employs the two common pins of multiplexers 4052 to connect to UART(RxD and TxD),and extends the UART of the MCU through time-sharing mode so as to form 4 serial ports.One serial port is connected to a wireless transceiving module,the others communicates with three external equipments monitoring water quality.The MCU gets the monitoring data from those serial devices and transmits through the wireless module.The transmission distance is up to 3 000 m.A computer far away from the scene receives data and analyzes it.This method is simple and reliable for UART expansion and long-distance data transfer.The transceiver can simultaneously connect multiple serial equipments,and makes up for a shortage of computer serial port.The characteristics of this transceiver is different from that of multi-serial-port card.The transceiver has been demonstrated successfully in water monitoring system with multi-sensors.