@Timvdv If the led is blinking light blue (cyan) rapidly it means that it cannot connect to the Particle API. This is likely due to ongoing performance issues with the API. If the device can’t connect to the API, then the iOS application probably thinks there is an issue connecting to the WIFI. As long as the device isn’t blinking green rapidly you are successfully connected. Check out http://status.particle.io for up-to-date information on the API status. Right now connection to the API is very hit or miss. It will likely be resolved in a couple hours. You can also go look here for more info on the API issues.