Bluetooth GATT Characteristic Reference

PnP ID (0x2A50)

org.bluetooth.characteristic.pnp_id

The PnP_ID characteristic is a set of values that used to create a device ID value that is unique for this device. Included in the characteristic is a Vendor ID Source field, a Vendor ID field, a Product ID field and a Product Version field. These values are used to identify all devices of a given type/model/version using numbers.

Quick Summary

Payload length is 7 bytes. This page is generated from official GATT XML and presented as implementation-ready guidance.

At a Glance

Key reference details for BLE implementation, interoperability testing, and AI-assisted troubleshooting.

Property	Value
Name	PnP ID
UUID	0x2A50
Type	org.bluetooth.characteristic.pnp_id
XML Root	Characteristic
Source File	org.bluetooth.characteristic.pnp_id.xml
Field Count	4

Field Specification

Parsed field definitions from the source XML value structure.

Field	Requirement	Format	Unit	Exponent	Notes
Vendor ID Source	Mandatory	uint8	-	-	Identifies the source of the Vendor ID field
Vendor ID	Mandatory	uint16	-	-	Identifies the product vendor from the namespace in the Vendor ID Source
Product ID	Mandatory	uint16	-	-	Manufacturer managed identifier for this product
Product Version	Mandatory	uint16	-	-	Manufacturer managed version for this product

Byte Layout and Decode

Payload length is 7 bytes.

function decodePayload(dataView, offset = 0) {
  const vendor_id_source = dataView.getUint8(offset + 0);
  const vendor_id = dataView.getUint16(offset + 1, true);
  const product_id = dataView.getUint16(offset + 3, true);
  const product_version = dataView.getUint16(offset + 5, true);
  return { vendor_id_source, vendor_id, product_id, product_version };
}

Use Cases and Integration Notes

BLE Telemetry

Map characteristic values into dashboards and alerts for device observability.

Firmware Regression

Compare decoded fields across builds to detect protocol or scaling changes.

App Integration

Build stable parsing paths that convert raw payloads into typed app models.

Implementation Checklist

Validate payload length and mandatory fields before decode.
Decode with Bluetooth-specified signedness, unit, and exponent handling.
Convert units at presentation boundaries to avoid drift in business logic.
Persist raw packets and decoded values for reproducible troubleshooting.

FAQ

What is PnP ID in Bluetooth GATT?

PnP ID is defined as a Bluetooth GATT characteristic entry with type org.bluetooth.characteristic.pnp_id and UUID 0x2A50.

What UUID identifies PnP ID?

The UUID for PnP ID is 0x2A50.

How should I parse PnP ID?