I am doing a project with the UNO to log GPS data to an SD card every minute then in between every log i want my wifi shield to search for my wifi signal. When the wifi signal is in range it connects to the wifi stops logging gps data and sends that data over a web server. I have everything working, but i'm not sure how to work with interrupts on the arduino. I need an interrupt to go off every 60 seconds to set a flag to check for a wifi signal. Any help is appreciated.
Thank You
xEDWARDSx:
I need an interrupt to go off every 60 seconds to set a flag to check for a wifi signal.
I don't think that's what you need. What you actually need is to check for a WiFi signal every 60 seconds. The blink without delay example sketch shows you how to carry out an activity at regular intervals.