Core connects to local server but immediately drops it (showing red light)

[mdma]

Great. Then please investigate your application code - the red light indicates some kind of error.

Core Firmware SOS Panic Codes

Are you getting a red flashing LED after running your code on your Spark core? You may be getting a panic code, telling you what went wrong! The panic code is a red LED blinking out SOS (… — …) followed by N flashes, followed by another SOS. Here are the meanings of the N flashes, but #8, out of heap, is the most common: #1 Hard fault #2 Non-maskable interrupt fault #3 Memory Manager fault #4 Bus fault #5 Usage fault #6 Invalid length #7 Exit #8 Out of heap memory #9 SPI over-run #10 Asserti…