Iphone5s(bluetooth4.0)smartphone can connect with equipment with nRF52810 Bluetooth5.0

[linda]

I'm planning using nRF52810 for a new product to reduce the power consumption. But i worried whether old smartphone with Bluetooth4.0, like Iphone5s can connect with equipment with Bluetooth5.0.

[RK]

Yes bluetooth is entirely backwards compatible and any BLE device should be able to connect with any other one because they start with the simplest protocol and negotiate the features they have.

[run_ar]

@Linda: This is not relevant to the original question, please create a new one (and maybe also search for related question first). Thanks.