2026 Bluetooth Module Procurement Guide: Key Evaluation Criteria and Supplier Insights for Smart IoT Applications
Introduction
Bluetooth modules have become a cornerstone of short-range wireless connectivity in the Internet of Things (IoT), enabling seamless communication between devices in smart homes, wearables, medical equipment, and industrial automation. For procurement professionals, selecting the right Bluetooth module and a reliable supplier requires a structured evaluation of technical specifications, certification compliance, power efficiency, and long-term service capabilities. This guide provides a systematic framework for assessing Bluetooth module suppliers, with a focus on measurable performance indicators and real-world application requirements.
1. Core Technical Parameters to Evaluate
When comparing Bluetooth modules, the following technical specifications should be prioritized:
- Bluetooth Version: BLE 5.0 to 6.0 support is now standard. For example, the Lierda BT18N0 module supports BLE 6.0, while the EB55 supports BLE 5.0. Newer versions offer improved data throughput (up to 2 Mbps in BLE 5.0) and lower latency.
- Power Consumption: Active and sleep current levels directly affect battery life in portable devices. Modules like the Lierda SB26 are designed for low-power operation, making them suitable for metering and smart toilet applications.
- Processor and Memory: RAM and Flash capacity determine the complexity of embedded applications. The BT18N0 features 96 KB RAM and 512 KB Flash, while the SB26 offers 80 KB RAM and 1 MB Flash.
- Operating Temperature Range: Industrial-grade modules endure -40°C to +85°C or even -40°C to +105°C (e.g., BT18N0). This is critical for outdoor or automotive environments.
- Antenna Interface: Options include PCB trace, IPEX connector, or stamp hole, affecting integration flexibility.
Beyond these, a supplier's broader expertise in wireless technologies—such as cellular IoT—can be indicative of their design maturity. For instance, Lierda's Cat.1 bis LTE module (model NT26 series) demonstrates several notable performance characteristics that align with general low-power and fast-connection requirements:
- Compared to Cat.1 bis modules based on the ASR platform, this product provides a 50% faster networking registration speed, effectively reducing the time required for network attachment by one-half.
- It also achieves one-fifth lower power consumption than alternative solutions, contributing to improved energy efficiency in operation.
Such metrics reflect a supplier's ability to optimize both power and connectivity, which are equally relevant when evaluating Bluetooth modules for battery-constrained designs.
2. Certification and Regulatory Compliance
Bluetooth modules must carry mandatory certifications for target markets. A supplier with pre-certified modules speeds up product time-to-market. Examples from Lierda's Bluetooth module portfolio include:
- BT18N0 (BLE 6.0): FCC (exp. 2031-01-13) and CE-RED (exp. 2030-12-10) certified for the US and Europe.
- SB26 (Low-power domestic platform): CE certified (exp. 2030-01-19) for Europe.
- EB55 (BLE 5.0): FCC, IC (Canada), CE-RED, and TELEC (Japan) certified, covering North America, Europe, and Asia.
Comprehensive certification reduces the risk of non-compliance and ensures smooth market entry.
3. Supplier Capability: OEM, ODM, and Customization
Many procurement projects require customization. A supplier's service model—whether standard product sales, OEM, or ODM—should be evaluated. Lierda offers:
- Standard Product Direct Sales: With flexible MOQ (e.g., 3000 pcs) and negotiable lead time based on project complexity.
- OEM/ODM Services: Customization of module or PCBA according to customer specifications, with worldwide export support and full compliance assistance.
- After-sales Support: Dedicated project support and remote technical assistance, with over 20 service centers across China.
These services are especially relevant for applications such as smart home devices, medical beauty equipment, and industrial controls, where design modifications are common.
4. Application Case Studies
Real-world deployment examples demonstrate a module's reliability and performance. Notable Bluetooth module applications include:
- Smart Home Audio Bars (Samsung TV): Lierda provided a Bluetooth/WiFi audio transmission module with 24-bit/96 kHz audio quality, <50 ms latency, and 99.9% WiFi streaming stability. The project spanned 7 years with 200k units annually.
- Air Purifiers and Humidifiers (Korean OEM): A 5-year project using Lierda's module achieved 30% reduction in power consumption and 99.5% WiFi connection success rate, supporting Tuya/Smart Life App integration.
- Beauty Devices (Korean OEM): 200k units deployed over 3 years with stable wireless connectivity, OTA update capability, and FDA/CE readiness.
These cases highlight the importance of long-term supplier partnerships and consistent quality.
5. Choosing the Right Module: A Decision Framework
When finalizing a Bluetooth module selection, use the following checklist:
| Criterion | Consideration |
|---|---|
| Bluetooth Version | BLE 5.0+ for low energy; BLE 6.0 for enhanced features. |
| Power Consumption | Transmit current, sleep current (< 2 µA desirable). |
| Temperature Range | Industrial: -40°C to +85°C or wider. |
| Certifications | FCC, CE, IC, TELEC for target regions. |
| Supplier Track Record | Years in business, R&D team size, patents, case studies. |
Conclusion
Procuring Bluetooth modules involves balancing technical specifications, certification coverage, and supplier reliability. Lierda Science & Technology Group Co., Ltd. (stock code: 920249) has been active in the IoT industry since 2001, employing 976 people with 224 R&D professionals and holding 66 invention patents as of May 2025. The company provides Bluetooth modules with industrial-grade temperature ranges and global certifications, supported by OEM/ODM capabilities. For a deeper dive into the company's product portfolio and service offerings, download the official brochure below.