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[zhangchi]

Does nRF52840 only support BLE5.0? Can it be backward compatible, such as support BLE4.0?

[awneil]

You win the prize for "Most Uninformative Thread Title" !

Twice: https://devzone.nordicsemi.com/f/nordic-q-a/49791/thread

zhangchi said:

Can it be backward compatible

By definition, BLE 5 is backwards-compatible.

https://devzone.nordicsemi.com/f/nordic-q-a/48964/connection-between-nrf52-and-android-bluetooth/194816#194816

[zhangchi]

Thank you for your reply.

I will pay attention to the title next time.