---
title: CBUUIDL2CAPPSMCharacteristicString
framework: corebluetooth
role: symbol
role_heading: Global Variable
path: corebluetooth/cbuuidl2cappsmcharacteristicstring
---

# CBUUIDL2CAPPSMCharacteristicString

The PSM of an L2CAP channel associated with the GATT service containing this characteristic.

## Declaration

```swift
let CBUUIDL2CAPPSMCharacteristicString: String
```

## Discussion

Discussion This PSM is a little-endian UInt16. Servers can publish this characteristic with the UUID ABDD3056-28FA-441D-A470-55A75A52553A.

## See Also

### Characteristic Descriptors

- [CBUUIDCharacteristicExtendedPropertiesString](corebluetooth/cbuuidcharacteristicextendedpropertiesstring.md)
- [CBUUIDCharacteristicUserDescriptionString](corebluetooth/cbuuidcharacteristicuserdescriptionstring.md)
- [CBUUIDClientCharacteristicConfigurationString](corebluetooth/cbuuidclientcharacteristicconfigurationstring.md)
- [CBUUIDServerCharacteristicConfigurationString](corebluetooth/cbuuidservercharacteristicconfigurationstring.md)
- [CBUUIDCharacteristicFormatString](corebluetooth/cbuuidcharacteristicformatstring.md)
- [CBUUIDCharacteristicAggregateFormatString](corebluetooth/cbuuidcharacteristicaggregateformatstring.md)