I just wanted to add some details here:
- No quoting is required in the file /storage/.cache/connman/mywifi.config for the Passphrase
- If you attempt to connect thru the UI and it prompts you for your passphrase then it's incorrect in this file
- You can see what SSIDs are available with this cmd iw dev wlan0 scan
- You can verify the IP assigned to wlan0 ip addr list wlan0