How should I factory reset the BrewPi Spark 3?

Since the valve boards are no longer for sale, and does not seem to come out for sale for a while, I am going for a BruControl solution instead. Now, how do I “factory reset” it and make it ready for the next person? I want to sell it either locally here in Norway or through Ebay.

Is it enough to just remove all widgets and blocks from controller and then ship it or is it connected to my Raspberry Pi?

Your Spark isn’t linked to any specific Pi, so to do a full reset, it’s enough to remove all blocks, and then clear Wifi config by holding down the SETUP button until the LED rapidly blinks blue.