Can't flash working code - Error: Could not compile. Please review your code

[Escko]

Ok, this one is solved. Got a new issue

Particle Core doesn't connect to WiFi (blinking green)

I've followed both options from here:

[Spark core] Common issues

Unable to connect to Wifi (blinking green) usually a CC3000 driver issue use particle-cli and run particle flash --usb cc3000 in DFU mode it will blink magenta and eventually revert to yellow next particle flash --usb tinker now setup wifi credentials using particle serial wifi Very old Spark core and want to update stuff particle flash --factory tinker particle flash --usb cc3000 (will blink magenta and eventually revert to yellow) particle flash --usb tinker next particle flash --usb t…

no luck. - blinking forever