Introduction
The E104-BT52X series Bluetooth low-energy modules from Chengdu Ebyte Electronic Technology Co., Ltd. (EBYTE) have fully passed four international authoritative certifications—CE, FCC, RoHS, and SRRC—marking that this product series has reached an internationally advanced level in RF performance, electromagnetic compatibility, environmental compliance, and market access. It provides safe, stable, and compliant Bluetooth wireless communication solutions for global customers.
This article will introduce in detail the product features of the E104-BT52X series and the differences between the two models.
| Certification | Name | Regulatory Region | Core Requirements |
|---|---|---|---|
| CE | EU Mandatory Safety Certification | European Economic Area (EEA) | Product meets EU basic requirements for safety, health, and environment; mandatory for entering the European market |
| FCC | US Federal Communications Commission Certification | United States | Ensures the product's electromagnetic radiation and interference immunity meet US standards; mandatory for entering the US market |
| RoHS | Restriction of Hazardous Substances Directive | EU | Restricts the content of six hazardous substances such as lead and mercury in electrical and electronic products; an important mark of environmental compliance |
| SRRC | China Radio Transmission Equipment Type Approval | China | China's mandatory access requirement for radio transmission equipment, ensuring equipment complies with national radio management regulations |
The fact that the E104-BT52X series has obtained all four certifications simultaneously means it has met the access thresholds of the most core markets in the world, providing strong compliance assurance for customers' product exports.
E104-BT52X Series Certification Details
| Product Model | Certifications Obtained | Certification Completeness |
|---|---|---|
| E104-BT52X | CE, FCC, RoHS, SRRC | ★★★★★ |
| E104-BT52X-V5.3 | CE, FCC, RoHS, SRRC | ★★★★★ |
Full-series certification: Both models of the E104-BT52X series have passed the four certifications—CE, FCC, RoHS, and SRRC—achieving comprehensive compliance coverage across the Chinese, European, and North American markets while also meeting environmental requirements.
E104-BT52X Series Product Overview
The E104-BT52X series is a Bluetooth low-energy surface-mount module developed by Chengdu Ebyte Electronic Technology Co., Ltd., based on Dialog DA14531 and DA14535 chips. The series adopts the IPEX-3 antenna solution and, with its ultra-compact 10×10mm size, is the most compact choice in the E104-BT52 series. The modules support Bluetooth BLE 5.0/BLE 5.3 protocols and feature master, slave, master-slave integrated, and observer modes. They use universal AT commands for parameter configuration, making operation simple and quick. The modules support low-power broadcasting, transparent transmission, over-the-air configuration, and other functions, with a maximum baud rate supporting data transmission of 460800bps.
Comparison of the Two Models' Parameters
| Main Parameter | E104-BT52X | E104-BT52X-V5.3 |
|---|---|---|
| Chip solution | DA14531 | DA14535 |
| Bluetooth protocol | BLE 5.0 | BLE 5.3 |
| Operating voltage | 2.1–3.6V | 1.8–3.6V |
| Transmit power | -19.5–2.5dBm | -18–3dBm |
| Receive sensitivity | -94dBm | -94dBm |
| Reference distance | 130m | 250m |
| Sleep current | 2uA | 2uA |
| Sleep advertising current | 10.37uA | 12.21uA |
| Sleep connection current | 466uA | 578uA |
| MTU | 244 bytes | 247 bytes |
| Dimensions | 10×10mm | 10×10mm |
| Antenna form | IPEX-3 | IPEX-3 |
| Serial wake-up | Supported | Supported |
| Low-power mode | Supported | Supported |
| Adjustable transmit power | Supported | Supported |
Analysis of Each Model's Features
E104-BT52X (Classic Version)
Based on the DA14531 chip, supports the BLE 5.0 protocol;
Ultra-compact size (10×10mm), uses the IPEX-3 antenna, the most compact model in the series;
Maximum transmit power 2.5dBm, reference distance 130m (with external antenna gain);
Supports serial wake-up and low-power sleep (sleep current 2uA);
Suitable for embedded applications with extremely limited space that require an external antenna for longer communication distance.
E104-BT52X-V5.3 (Upgraded Version)
Based on the DA14535 chip, upgraded to the BLE 5.3 protocol;
Maximum transmit power increased to 3dBm, reference distance increased to 250m;
MTU increased to 247 bytes, supporting larger packet transmission;
Wider operating voltage range (1.8–3.6V);
Suitable for applications pursuing higher performance, the latest protocol standards, and longer communication distance.
E104-BT52X Series Core Functional Features
| Functional Feature | Description |
|---|---|
| Multiple role modes | Supports Bluetooth master, slave, master-slave integrated, and observer modes |
| Dual working modes | Supports configuration and transparent transmission working modes |
| Automatic connection | Supports automatic broadcasting on power-on and automatic connection |
| MAC binding | Supports MAC binding connection, with a maximum of 3 bound devices |
| Flexible UUID configuration | Supports custom 16-bit and 128-bit UUIDs |
| Over-the-air configuration | Supports Bluetooth parameter over-the-air configuration (slave mode) |
| Multi-master/multi-slave | Maximum connection quantity of 2 slaves |
| Broadcast mode switching | Supports iBeacon and normal broadcast switching |
| Serial wake-up | Supports wake-up via serial RX pin |
| Transmit power modification | Supports transmit power modification |
Typical Application Scenarios
| Application Field | Specific Scenarios | Recommended Model |
|---|---|---|
| Smart wearables | Bands, watches, health monitoring devices | E104-BT52X |
| Smart home | Smart lighting, door locks, appliance control | E104-BT52X-V5.3 |
| Home security | Door sensors, infrared alarms, sensor reporting | E104-BT52X |
| Industrial Internet | Data acquisition, equipment remote control | E104-BT52X-V5.3 |
| Accessories and remote controls | Bluetooth remote controls, smart accessories | E104-BT52X-V5.3 |
With its complete combination of CE, FCC, RoHS, and SRRC four international certifications, the E104-BT52X series Bluetooth modules achieve comprehensive compliance coverage across the Chinese, European, and North American markets while also meeting global environmental requirements. From the classic BLE 5.0 E104-BT52X to the upgraded BLE 5.3 E104-BT52X-V5.3, this series, with its ultra-compact 10×10mm size and IPEX-3 antenna solution, provides global customers with compact Bluetooth solutions ranging from 130 meters to 250 meters in communication distance.
Choose the Ebyte E104-BT52X series to select an ultra-compact, high-performance, highly reliable Bluetooth wireless communication solution recognized by global authoritative certifications, allowing your IoT projects to cross borders and pass through without barriers.
