Well so far I can measure distance with the HC-SR04, temperature and humidity with the DHT11 and get a time / date stamp from the RTC. I can almost have it write to the lcd2004 (4x20) screen. I can get all that data to appear correctly on the serial monitor. However I cant figure out how to include the data logger and the bluetooth module. I have learned how to use both the data logger and the BT by themselves but not with everything else. I cant seem to create a proper sketch.