问获取所有具有未知地址的Modbus连接设备

EN

  modbus_t *modbusCtxPtr=NULL;
  int modbus_id=9; // Modbus address 

  modbusCtxPtr = modbus_new_rtu(TTYDEVICE, BAUDRATE, 'N', 8, STOPBITS);
  if (modbusCtxPtr == NULL) 
  {
     errorAndLogLogger(TTY_ERROR, "ERROR - Unable to create the libmodbus context.");
     return;
  }
  if (modbus_set_slave(modbusCtxPtr, modbus_id) == -1)
        errorAndLogLogger(TTY_ERROR, "ERROR - Error in setting slave id.");
  if (modbus_connect(modbusCtxPtr) == -1)
        errorAndLogLogger(TTY_ERROR, "ERROR - Modbus Connection failed.");

  /* Here, I called read register over Modbus, function. */