Using Single-chip Microcomputer to Control Modem to Realize Long-distance Measurement for Flow

This paper introduced the constitute of the long distance flow measuring system, gave the hardware diagram of modem controlled by single chip microcomputer, the communication agreement between single chip microcomputer and PC, software flowdiagram and some program lists. The design is used for long distance flow measuring system of irrigation ditch. It also can be used in other long distance automation measuring system.