Where can I start from zero with nRF52

[QQ645116977]

I know nothing about bluetooth like ble_app_uart , uart to where?how to use this uart? like ble_app_alert_notification, alert? beep? vibrator?

any tutorial of develop? forget that infocenter, it doesn't describe details

[RK]

At the top of this very page is a 'Tutorials' link. Have you looked at them? Having your first post complain about the infocenter without providing a single detail yourself about what you think is lacking isn't a great start.

Check the tutorials, if you have actual questions instead of a generic 'it's not good enough', post them.