If they are Z-wave or Zigbee temperature sensors you can use @Mariano_Colmenarejo "Zigbee Temp Sensor and Child Thermostat Mc or “Z-Wave Sensor and Child Thermostat Mc” driver. Once you change to his driver you can create a virtual thermostat using the settings menu in that device and it will automatically receive the room temperature from the parent device.
The alternate method which would work with Z-wave, Zigbee, WiFi and c2c devices is to use the API Rules. The rule would transfer the room temperature from your physical device to the virtual thermostat. You can copy some ones rule, edit the devise IDs and upload the revised rule using @TAustin API Browser+.