I’ve ran through all the troubleshooting steps; cleared memory,factory reset. I used Putty to add Wifi credentials when the App failed. I have tried 3 different access points: 1) Ubiquti Unifi, 2) D-Link , 3) Cisco Aeronet; all b/g/n friendly, all WPA2+PSK. Powered over USB and a 5v, 750mA charger. Just flashes green. Chip antenna.
Received Spark device early March. Faulty device?