Hi John, To read the temperature data you have to plug the arduino into a computer that has the arduino IDE installed. The version I have is Arduino 1.8.3. Once you have it plugged in, the console in the IDE should print out "EEPROM contains data. Flip switch to overwrite". At that point you can type the letter 'r' hit enter and it will print out the data. First it will print out the list of inside temperatures then the list of outside temperatures. You can then copy paste from the console. I've attached the code I have. One is from the balloon that used the DHT_11 sensors, and I don't remember the sensors for the other one. Reading the EEPROM is the same for both, so it shouldn't matter. It is probably best that you pull the arduino out of the cube and disconnect it from the switch to avoid accidentally turning it on with the "erase switch" in the on position. Let me know if you have an trouble or more questions. Good luck! -Morgan Miller