ESP32 wifi smart_config example

[a.cruz]

Hi everyone,
I have flash my ESP32 DeviceKitC with the wifi smart_config example from github.com.
It works sucesffully (using the ESP8266 SmartConfig app), but only if I have connect the usb cable to the PC. When I powered the board with an external 5V source and without the usb cable, the wifi is not working. May I do something in this case? The firmware flashed in the ESP-WROM-32 must be upload each time I start-up system? ThankYou