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# peripheralManager(_:didReceiveRead:)

Tells the delegate that a local peripheral received an Attribute Protocol (ATT) read request for a characteristic with a dynamic value.

```
optional func peripheralManager(_ peripheral: CBPeripheralManager, didReceiveRead request: CBATTRequest)
```

## Parameters

`peripheral`

The peripheral manager that received the request.

`request`

A [`CBATTRequest`](/documentation/CoreBluetooth/CBATTRequest) object that represents a request to read a characteristic’s value.

## Discussion

When you receive this callback, call the [`respond(to:withResult:)`](/documentation/CoreBluetooth/CBPeripheralManager/respond(to:withResult:)) method of the [`CBPeripheralManager`](/documentation/CoreBluetooth/CBPeripheralManager) class exactly once to respond to the read request.

---

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