You download M5Burner,
Connect the M5Stack,
Select the USB port,
Download the latest firmware version for the M5Stack,
Erase the software on the device with the erase button,
Write the UIFlow version to the device and wait for it to restart,
Close M5Burner,
Open wifi manager and connect to M5 wifi device,
Open web browser and goto the IP address on the screen,
Select your home wifi and type in password (spaces are not allowed in wifi SSID),
If you connect succesfully, the API with be shown on the screen as it tries to connect to the UIFlow web server.