Note: All parameters in this article are derived from Ebyte's official product specifications, selection manuals, and public technical documents. The nominal values represent ideal test results in an open, laboratory environment. Actual performance may vary depending on the installation environment, antenna matching, and power supply quality.

1. Product Series Overview

1.1 Technical Positioning

SparkLink SLE (SparkLink Low Energy) is a next-generation short-range wireless communication technology independently developed in China. Positioned to compete with Bluetooth Low Energy (BLE), it offers significant improvements in transmission rate, latency, anti-interference capability, and coverage range.

Chengdu Ebyte’s SLE SparkLink modules all utilize domestic chip solutions and support the SparkLink 1.0 protocol standard. The product line is divided into two categories: Pure SLE Passthrough Modules and Wi-Fi + BLE + SLE 3-in-1 Combo Modules. Covering consumer-grade to industrial-grade scenarios, they support AT command configuration, allowing users to quickly achieve wireless networking without complex protocol development.

1.2 Product Line Classification

Product Series Sub-models Core Positioning Typical Scenarios
E105-BS21 Pure SLE Series E105-BS21, E105-BS21X Low-power basic model, pure SparkLink single protocol Battery-powered sensor nodes, smart wearables, low-cost smart home devices
E105-WBS36 3-in-1 Combo Series E105-WBS36S, E105-WBS36SP High-performance multi-protocol model, supports Wi-Fi 6 + BLE 5.4 + SLE 1.0 simultaneously Smart home appliances, industrial gateways, multi-protocol fusion devices
EWM105-WBS30S Combo Series EWM105-WBS30S Stamp-hole encapsulation, highly integrated Compact smart terminals, embedded module solutions

2. Core Parameter Comparison Table

2.1 Basic Information & Hardware Parameters

Product Model Chip Solution Supported Protocols Operating Frequency Communication Interface Package Type Antenna Type Dimensions
E105-BS21 Domestic BS21 SLE 1.0 2402~2480MHz ISM UART SMD Onboard PCB Antenna 25.5×18mm
E105-BS21X Domestic BS21 SLE 1.0 2402~2480MHz ISM UART SMD IPEX External Connector 19.2×18mm
E105-WBS36S Domestic TR5330 SLE 1.0 + Wi-Fi 6 + BLE 5.4 2.4GHz ISM UART, GPIO, SPI, I2C, ADC SMD Onboard PCB Antenna 10×10mm
E105-WBS36SP Domestic TR5330 SLE 1.0 + Wi-Fi 6 + BLE 5.4 2.4GHz ISM UART, GPIO, SPI, I2C, ADC SMD / Stamp Hole Onboard PCB Antenna 16×11.5mm
EWM105-WBS30S Domestic TR5330 SLE 1.0 + Wi-Fi 6 + BLE 5.2 2.4GHz ISM UART, USB2.0, GPIO Stamp Hole Onboard PCB Antenna 12×12mm

2.2 RF Performance Parameters

Product Model Max Transmit Power Receiver Sensitivity Max Line-of-Sight Range Max SLE Air Data Rate Supported Bandwidth
E105-BS21 6dBm (Adjustable -28~6dBm) -90.6dBm 270m / /
E105-BS21X 6dBm (Adjustable -28~6dBm) -90.6dBm 270m (Further with external antenna) / /
E105-WBS36S 20dBm (SLE mode, AT adjustable) / 1000m (With 5dBi external antenna) 4Mbps 1MHz / 2MHz / 4MHz
E105-WBS36SP 20dBm (Built-in PA/LNA) Better Further (Enhanced link budget) 4Mbps 1MHz / 2MHz / 4MHz
EWM105-WBS30S 20dBm (SLE mode) / / 4Mbps 1MHz / 2MHz / 4MHz

2.3 Power Consumption & Electrical Parameters

Product Model Supply Voltage Range Transmit Current Receive Current Deep Sleep Current Operating Temperature
E105-BS21 1.8~3.6V DC 12.5mA (6dBm peak) 2.5mA 6μA -40°C~+85°C
E105-BS21X 1.8~3.6V DC 12.5mA (6dBm peak) 2.5mA 6μA -40°C~+85°C
E105-WBS36S 3.0~3.6V DC (3.3V Rec.) ~450mA (SLE Max Power) / / -40°C~+85°C
EWM105-WBS30S 3.0~3.6V DC (3.3V Rec.) ~450mA (SLE Max Power) / / -40°C~+85°C

2.4 Hardware Resources Comparison

Product Model GPIO Count Peripheral Interfaces Built-in Flash Built-in RAM Processor Core
E105-BS21 / UART 512KB 160KB RISC-V
E105-WBS36S 19 3×UART, 2×I2C, 1×SPI, 1×I2S, 6×ADC, 8×PWM 4MB 606KB 32-bit High-performance MCU

3. Deep Dive into Series Differences

3.1 Pure SLE Modules vs. 3-in-1 Combo Modules

Dimension E105-BS21 Pure SLE Series E105-WBS36 3-in-1 Combo Series
Protocol Support Supports SparkLink SLE single protocol only Simultaneously supports SparkLink SLE, Wi-Fi 6, and BLE 5.4 (switchable working modes)
Performance Basic low-power model, lower rate and power High-performance model, higher transmit power, supports high-speed transmission
Hardware Resources Streamlined resources, basic UART and GPIO only Rich peripheral resources, multiple interfaces, capable of edge computing
Material Cost Lower, ideal for mass production of single-function devices Higher, suitable for multi-functional smart terminals
Development Complexity Very low, pure passthrough mode, AT command configuration Moderate, multi-protocol switching requires corresponding development
Application Scenarios Battery-powered sensors, simple remote controls, low-rate data transmission Smart home appliances, gateways, multi-protocol terminals, high-speed data transmission

3.2 Key Differences Within the Same Series

1. E105-BS21 vs. E105-BS21X

The core parameters of these two models are identical; they differ only in antenna type and dimensions:

  • E105-BS21: Onboard PCB antenna, higher integration, no need for extra antenna sourcing. Best for spacious, cost-sensitive devices.

  • E105-BS21X: IPEX antenna connector, allows external high-gain antennas to boost communication range and penetration. Best for complex installation environments.

2. E105-WBS36S vs. E105-WBS36SP

  • E105-WBS36S: Standard high-performance model, ultra-small size ($10 \times 10\text{mm}$), ideal for compact devices with optimized cost.

  • E105-WBS36SP: Enhanced performance model with built-in PA/LNA, providing a higher link budget, stronger anti-interference, and superior wall-penetration capabilities. Best for harsh industrial environments.

4. Structured Selection Recommendations

4.1 Selection by Core Requirements

Core Requirement Recommended Model Core Selection Reason
Ultra-low cost, pure SparkLink single protocol E105-BS21 Pure SLE transparent transmission, lowest price, easy development, meets basic data transfer needs.
Battery powered, ultra-long battery life E105-BS21X Microamp-level sleep current, low-power mode allows coin cell batteries to last for years.
Requires Wi-Fi + Bluetooth + SparkLink simultaneously E105-WBS36S 3-in-1 single-chip solution, reduces peripheral components, saves PCB space.
Complex environment, long-range & high anti-interference E105-WBS36SP Built-in PA/LNA enhancement, 20dBm transmit power, covers longer distances with an external antenna.
Extremely tight device space, compact design E105-WBS36S $10 \times 10\text{mm}$ ultra-small size, highly integrated, suitable for miniature smart terminals.

4.2 Selection by Industry Scenarios

  • Smart Home (Lighting, Switches, Sensors): E105-BS21 / E105-WBS36S — Low power consumption, supports fast SparkLink connection, easily integrates into HarmonyOS Connect / SparkLink ecosystems.

  • Smart Wearables (Wristbands, Earphones, Health Monitors): E105-BS21X — Small footprint, low power consumption; external antenna optimizes signal performance in body-worn scenarios.

  • Industrial Sensing & Data Acquisition: E105-WBS36SP — Industrial-grade wide temperature range, strong anti-interference, multi-protocol support, seamlessly connects to industrial gateways.

  • Consumer Remote Controls (Drones, Toys, Peripherals): E105-WBS36S — Low latency, high data rate, superior anti-interference compared to traditional Bluetooth.

  • Asset Tracking & Logistics Tags: E105-BS21X — Low power for long battery life, IPEX connector offers flexible enclosure matching.

5. Risks and Considerations During Selection

5.1 RF and Antenna Design

  1. All SparkLink modules feature a 50Ω impedance characteristic. They must be paired with antennas of the corresponding frequency band and impedance. Mismatched impedance causes transmit power attenuation, decreases receiver sensitivity, and severely shrinks the communication range.

  2. For models with an onboard PCB antenna, a keep-out zone must be reserved during PCB layout. Do not place copper, metal components, or trace lines near the antenna area, otherwise RF performance will degrade significantly.

  3. When using an external antenna, the feeder line should be kept as short and straight as possible to avoid excessive bending. Account for feeder line loss over longer runs, and compensate using a high-gain antenna if necessary.

5.2 Hardware Design Standards

  1. The module supply voltage ripple must be controlled within 50mV. It is highly recommended to connect a 100nF ceramic capacitor in parallel with a 10μF electrolytic capacitor at the power input for filtering to prevent power supply noise from interfering with the RF circuit.

  2. The E105-BS21 series operates on 3.3V logic levels. Do not connect it directly to the IO ports of a 5V microcontroller. Level-shifting circuits or voltage-divider resistors must be added to prevent burning out the module.

  3. For outdoor industrial scenarios, adding ESD and surge protection circuits at the antenna port is strongly advised to enhance device reliability.

5.3 Protocol and Ecosystem Compatibility

  1. SparkLink SLE is a domestic standard in China and primarily targets domestic ecosystems like HarmonyOS Connect. For export projects, please verify frequency band compliance and ecosystem support in the destination country or region.

  2. The three protocols in the 3-in-1 Combo modules work via time-division multiplexing; they cannot run at full load concurrently. Scenarios requiring high multi-protocol concurrency should be evaluated thoroughly beforehand.

  3. Pure passthrough mode only supports transparent data transmission. If you require customized development for standard SparkLink services (such as broadcasting or connection management), please contact the manufacturer for SDK support.

5.4 Certification Compliance

  1. Ebyte's mainstream SparkLink modules have obtained SRRC Type Approval, making them compliant for sale and use within mainland China. Qualification documents can be requested from the supplier for bulk projects.

  2. Exporting to regions like the EU or North America requires additional certifications such as CE or FCC. You may opt for certified base versions or contact Ebyte for pre-testing support.

References

  • [1] Chengdu Ebyte Electronic Technology Co., Ltd. IoT Product Selection Manual [Z]. 2024.

  • [2] Chengdu Ebyte Electronic Technology Co., Ltd. E105-BS21 Series SLE SparkLink Module Product Specification [EB/OL]. https://www.cdebyte.com/products/E105-BS21, 2025.

  • [3] Chengdu Ebyte Electronic Technology Co., Ltd. Technical Analysis of Pure Domestic Wi-Fi6+BLE5.4+SLE1.0 Multi-Protocol SparkLink Combo Passthrough Module [EB/OL]. https://ebyte.com/news/4628.html, 2026.