I have an arduino project based on a compilation of neopixel scripts and a wifi CC3000 shield. Everything works fine when I am connected with USB to my computer. I have a lot of Serial.print calls and can see everything fine.
Now I am ready to go live and when I power the arduino through the barrel connector instead of usb… it powers on, but it never executes the code. Seems like it is crashing within. I wondered if it was because it was trying to make Serial calls but since it doesn’t have a serial connection, it just fatally errors silently. Do I need to remove all the serial interfacing before going live? Or would it be something else?
I shrunk my test down to a simple 1m strand of neopixels, powered through the arduino and again it works fine if i power it through usb, but when I switch to the barrel (5.25v switching PS purchased from Adafruit for just such an application) it never executes.