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Bluetooth SIG Guide

1. Introduction

This guide describes the Bluetooth SIG, Bluetooth technologies, and regulatory requirements.

2. The Bluetooth SIG

The Bluetooth Special Interest Group (SIG) is the international standardization and licensing organization behind Bluetooth.

It was founded in 1998 and today manages:

  • Bluetooth specifications (protocols, profiles, test cases)
  • trademarks (Bluetooth name & logo)
  • the qualification/certification process
  • the membership structure (companies worldwide)

Important: The Bluetooth SIG does not develop chips or products itself – it defines rules, tests, and approvals.

3. What is Bluetooth (technical)?

Bluetooth is a licensed radio standard for short-range communication in the license-free 2.4 GHz ISM band.

Core characteristics:

  • Frequency: 2.402 – 2.480 GHz
  • Modulation: GFSK, π/4-DQPSK, 8-DPSK
  • Range: approx. 10 m to >100 m
  • Topologies: point-to-point, star, mesh
  • Focus: low energy consumption, robust coexistence

Bluetooth is not a single protocol, but a protocol stack consisting of radio, baseband, L2CAP, GATT, ATT, profiles, etc.

4. Bluetooth Technologies

4.1 Bluetooth Classic (BR/EDR)

  • High data rate
  • Persistent connections

Typical applications:

  • Audio (A2DP, HFP)
  • Keyboards, mice
  • Automotive infotainment

Technology:

  • Data rate up to ~3 Mbit/s
  • Higher power consumption

4.2 Bluetooth Low Energy (BLE)

  • Extremely energy-efficient
  • Event-based communication

Typical applications:

  • IoT sensors
  • Wearables
  • Beacons

Technology:

  • Data rate: 125 kbit/s – 2 Mbit/s
  • Advertising mode without connection
  • GATT-based services & characteristics

4.3 Bluetooth Mesh

  • Based on BLE
  • Many-to-many networks

Typical applications:

  • Building automation
  • Lighting systems
  • Smart cities

5. Bluetooth Profiles

Bluetooth works on a profile-based approach. A product implements profiles, not “Bluetooth functionality” itself.

Examples:

  • GATT Profile (BLE)
  • HID (Human Interface Device)
  • A2DP (Audio Streaming)
  • HFP (Hands-Free)
  • Device Information Service

Each profile has its own test requirements.

6. Bluetooth Rules & Compliance

Any product that uses Bluetooth AND is marketed must be qualified with the Bluetooth SIG.

This also applies to:

  • OEM products
  • Re-branding
  • Firmware updates with protocol changes

6.1 What does “using Bluetooth” mean?

A product is considered a Bluetooth product if it:

  • uses Bluetooth radio or
  • implements Bluetooth profiles or
  • is marketed with the Bluetooth logo

6.2 What is Bluetooth qualification?

Qualification confirms:

  • compliance with the Bluetooth specification
  • interoperability
  • correct implementation of profiles

Result:

  • QDID (Qualified Design)

7. Conformance Testing

When does a manufacturer need Bluetooth conformance testing?

Conformance testing is required if:

  • a new Bluetooth stack is developed
  • custom profiles or services are implemented
  • the host or controller implementation is modified
  • no previously qualified reference stack is used

Conformance testing is NOT required if:

  • a fully qualified module is used without modification
  • only application code runs on standardized APIs
  • no Bluetooth-relevant changes are made

In that case, a listing/declaration is usually sufficient.

8. Test Labs & Certification

Conformance tests may only be carried out in official laboratories:

BQTF – Bluetooth Qualified Test Facilities

  • Accredited by the Bluetooth SIG
  • Available worldwide (Europe, Asia, USA)

Support and consulting are provided by:

BQC – Bluetooth Qualification Consultants

  • Assist with the testing & qualification process
  • Not mandatory, but strongly recommended

9. Cost Structure

9.1 Membership in the Bluetooth SIG

  • Adopter Member: free
  • Associate / Promoter: several thousand to >50,000 USD/year

Adopter is sufficient for product qualification.

9.2 Qualification costs (per product)

  • Declaration / Listing: 0 – 4,000 USD
  • Conformance testing: 5,000 – 30,000+ USD
  • Re-testing: depends on scope

Costs vary depending on:

  • number of profiles
  • BLE vs Classic
  • number of test failures

10. Timelines

Without conformance testing:

  • 1–3 days (declaration only)

With conformance testing:

  • Preparation: 1–3 weeks
  • Lab testing: 1–2 weeks
  • Debugging: variable

Total duration: 4–8 weeks, sometimes longer

11. Typical Qualification Process

  • Check Bluetooth membership
  • Define architecture (own stack vs module)
  • Select profiles & specifications
  • Pre-compliance testing internally
  • Official BQTF testing (if required)
  • Submission to Bluetooth SIG
  • Receive QDID
  • Use of logo & marketing approval

12. Common Manufacturer Mistakes

  • Using Bluetooth logo without qualification
  • Firmware updates without re-evaluation
  • Assumption: “module = automatically qualified”
  • Incomplete profile testing

These mistakes can lead to penalties or sales bans.

13. Conclusion

  • The Bluetooth SIG is regulator & licensor
  • Bluetooth consists of multiple technologies & profiles
  • Compliance is mandatory
  • Conformance testing depends on the situation
  • Costs & timelines should be planned early