I need a little help about testing my code. I have wrote a program in Arduino that uses a clock to turn relays on and off. There are 4 relays that turn on depending on week day hour min. These relays turn on at different times of the day week hour or min. I want to run this program over a week for testing to be sure that all is ok. What can I use that over that week i can have some kind of log telling me when each relay came on and turn off. Thanks for the help.