---
title: protocolString
framework: externalaccessory
role: symbol
role_heading: Instance Property
path: externalaccessory/easession/protocolstring
---

# protocolString

The protocol being used for communication with the accessory.

## Declaration

```swift
var protocolString: String? { get }
```

## See Also

### Getting Session Information

- [accessory](externalaccessory/easession/accessory.md)