... 1 selectable RS-232/485 serial port connect slave to read and writer 32 registers, CWT5002-1 is an ideal solution ... RTU protocol on RS232 or RS485, monitor modbus slaveRead or write 32 registers (coil or input registers) on Modbus via GPRS ... data to server when above the normal rangeSupport SMS operation (read or write registers)GPRS Terminal featureSupport connects 4 servers, the servers ...