delay() broken on MSP430FR4133? blink doesn't work in Energia - MSP Posted June 20, 2016 Sorry, you are correct, the blink sketch DOES work. Thanks. (I don't know why I chased down this rabbit hole, I was thrashing in updating the firmware or uploading.) Why would Energia be using the WDT? Also, I recall code to enable interrupts in the body of delay(), but not code to disable them. I need to read it more carefully.