NearLink (StarFlash) SLE 1.0 is China's new generation of short-range wireless communication technology, integrating multiple advantages such as high-speed transmission, ultra-low latency, low power consumption, and large-capacity networking. Chengdu Ebyte has launched a complete E105 NearLink product line, divided into two main branches: the NearLink single-mode BS21 series, and the 3-in-1 Combo series (NearLink + WiFi + BLE). These modules cover three major application areas: consumer electronics, smart automotive, and smart manufacturing. Based on Ebyte's official product manuals and public parameters, this guide uses multi-dimensional parameter tables to compare the differences across all E105 models. It provides a standardized selection scheme aligned with application scenarios, hardware requirements, and R&D conditions.

1. Overall Classification of Ebyte E105 NearLink Products

The Ebyte E105 NearLink modules are divided into two primary product categories, comprising 6 mature, mass-produced models. The classification is detailed below:

Product Category Sub-Models Core Protocol Combination Core Positioning Target Industries
Single-Mode BS21 Series

E105-BS21


E105-BS21X

 SLE 1.0 NearLink protocol only Pure NearLink low-power communication, ultra-low cost Consumer electronics, smart car accessories, small sensor devices
3-in-1 Combo Series (NearLink + WiFi6 + BLE)

E105-WBS36S


E105-WBS36SP


EWM105-WBS30S

 SLE 1.0 + WiFi 6 + BLE 5.2/5.4 Tri-protocol integration, featuring wireless transparent transmission, networking, and Bluetooth pairing Smart manufacturing, smart home, industrial IoT, HD wireless screen casting

2. Comprehensive Hardware Parameter Comparison (E105 Series)

The following table integrates the core parameters of all 6 models, including size, RF performance, packaging, interfaces, and transmission distances:

Comparison Dimension E105-BS21 E105-BS21X E105-WBS36S E105-WBS36SP EWM105-WBS30S
Chipset BS21 BS21 TR5336 TR5336 TR5336
Operating Frequency 2.4GHz 2.4GHz 2.4GHz 2.4GHz 2.4GHz
Communication Protocol SLE 1.0 NearLink SLE 1.0 NearLink SLE1.0 + WiFi6 + BLE5.4 SLE1.0 + WiFi6 + BLE5.4 SLE1.0 + WiFi6 + BLE5.2
Transmit Power 6dBm 6dBm 20dBm 20dBm 20dBm
Max Distance 270 meters 270 meters 1000 meters 1000 meters 1000 meters
Communication Interface UART UART UART UART UART
Antenna Interface On-board PCB Antenna IPEX External Antenna SMD Antenna Pin On-board PCB Antenna On-board PCB Antenna
Packaging Form SMD Castellated Hole SMD Castellated Hole Pure SMD SMD + Castellated Hole Castellated Hole
Dimensions 18 * 25.5mm 18 * 19.2mm 10 * 10mm 11.5 * 16mm 12 * 12mm
Weight Not specified Not specified 0.5g ± 0.1g 0.65g ± 0.1g 0.6g ± 0.1g

3. Detailed Comparison of Sub-Models

3.1 Single-Mode BS21 Series (E105-BS21 & E105-BS21X)

The primary differences between the two single-mode modules lie in the antenna design and overall dimensions. All other RF and communication parameters are identical.

Comparison Item E105-BS21 E105-BS21X Impact on Selection
Antenna Configuration Built-in PCB Antenna IPEX External Antenna Base BS21 requires no extra antenna, simplifying design; BS21X supports external high-gain antennas, ideal for devices with metal enclosures.
Dimensions 25.5 * 18mm 19.2 * 18mm BS21X has a shorter length, making it suitable for tight internal installation spaces.
Common Attributes 2.4GHz frequency, 6dBm transmit power, 270m communication distance, UART transparent transmission, SLE 1.0 protocol, SMD castellated hole packaging, low power consumption. Both support only pure NearLink communication (no WiFi or Bluetooth), resulting in lower BOM costs.

3.2 3-in-1 Combo Series (3 Models)

The E105-WBS36S, E105-WBS36SP, and EWM105-WBS30S modules all integrate NearLink, WiFi 6, and Bluetooth. Their differences focus on packaging, dimensions, and Bluetooth version.

Comparison Dimension E105-WBS36S E105-WBS36SP EWM105-WBS30S
Bluetooth Version BLE 5.4 BLE 5.4 BLE 5.2
Packaging Method Pure SMD SMD + Castellated Hole Castellated Hole
Dimensions 10 * 10mm 11.5 * 16mm 12 * 12mm
Antenna Design SMD Antenna Pin On-board PCB Antenna On-board PCB Antenna
Device Weight 0.5g ± 0.1g 0.65g ± 0.1g 0.6g ± 0.1g
Common Attributes TR5336 chip, 20dBm high power, 1000m long-distance communication, UART transparent transmission, SLE 1.0 + WiFi 6 + BLE protocols. All support multi-protocol cooperative operation, enabling high-speed NearLink screen casting, WiFi cloud networking, and rapid Bluetooth pairing.

4. Selection Guide by Industry Application

Application Industry Core Industry Pain Points Recommended Model(s)
Consumer Electronics (Wireless mice, earbuds, drawing tablets) Strict limits on device volume, sensitive to power consumption, stringent cost control. E105-BS21
Smart Automotive (In-car NearLink keys, ambient lighting, TPMS) Metal car bodies shield RF signals; requires external antennas for signal extension. E105-BS21X
Smart Manufacturing (4K wireless projection, industrial noise cancellation) Needs high-speed NearLink data transmission while simultaneously uploading device data to the cloud via WiFi. E105-WBS36S, E105-WBS36SP
Smart Home / Home Automation A single module must handle short-range NearLink control, Bluetooth pairing, and WiFi data uploads. EWM105-WBS30S, E105-WBS36S
Industrial IoT / Smart Data Acquisition Must balance prototype debugging with mass production; high hardware compatibility requirements. E105-WBS36SP

5. Frequently Asked Questions

Q1: What is the core difference between the single-mode BS21 and the 3-in-1 Combo modules?

  • The BS21 single-mode only features the SLE 1.0 NearLink protocol (no WiFi or Bluetooth), resulting in lower power consumption and material costs.

  • The 3-in-1 Combo modules integrate NearLink, WiFi 6, and Bluetooth, allowing simultaneous local high-speed communication, cloud networking, and rapid Bluetooth pairing. While more functional, they have relatively higher costs and power consumption.

Q2: What devices are best suited for the E105-BS21X (IPEX external antenna version)?

  • It is highly recommended for devices with metal enclosures or metal cavities, which severely block the RF signals of built-in PCB antennas. The IPEX interface allows the connection of high-gain antennas that can be extended outside the device casing, ensuring stable communication.

Q3: How should I choose among the three 3-in-1 Combo modules?

  • For extreme miniaturization: Choose E105-WBS36S.

  • To balance mass production (SMD) and manual prototype debugging: Choose E105-WBS36SP.

  • For standard smart home and small industrial equipment selection: Choose EWM105-WBS30S.

Q4: What determines the difference in transmission distance among NearLink modules?

  • The distance is primarily determined by transmit power. The BS21 single-mode has a 6dBm output, yielding a max distance of 270 meters. The 3-in-1 Combo series boasts a 20dBm high power output, providing a maximum line-of-sight communication distance of up to 1000 meters, with significantly improved wall-penetration and anti-interference capabilities.

6. Summary

  • Low-cost, basic short-range NearLink communication, consumer/automotive electronics: Prioritize the E105-BS21. If the device has a metal shell requiring signal extension, choose the E105-BS21X.

  • Full-featured (NearLink + WiFi + Bluetooth) and long-distance/wall-penetrating industrial, smart home, or HD projection projects:

    • Micro-devices requiring minimal footprint: E105-WBS36S

    • Dual need for SMD mass production & manual debugging: E105-WBS36SP

    • Standard-size assembled devices: EWM105-WBS30S

Note: Ebyte's entire E105 NearLink module series comes with comprehensive datasheets, AT command manuals, and debugging software. The manufacturer supports free sample evaluation for customers and provides matching antennas and technical R&D support services.