The EBYTE EWM104-BT57UP is a compact, low-power BLE 5.2 USB virtual serial port adapter operating in the 2.4GHz band that features master-slave integration and universal AT command configuration to deliver secure, transparent wireless data transmission up to a range of 220 meters.
| Parameter Item | EWM104-BT57UP Technical Specifications |
|---|---|
| Bluetooth Protocol Version | Bluetooth Low Energy 5.2 (BLE 5.2) |
| Operating Frequency | 2.4 GHz ISM Band |
| Communication Interface | USB (Virtual Serial Port / CDC Virtual COM) |
| Reliable Communication Distance | 220 meters (In open, unobstructed outdoor environments) |
| Supported Functional Modes | Master-Slave Integration (Software switchable via AT commands) |
| Configuration Interface | Universal AT Commands (Simple serial communication commands) |
| Physical Enclosure Dimensions | 60.0 * 18.0 * 8.5 mm |
| Module Net Weight | 7.5 grams plus or minus 0.1 grams |
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【Driver File】CH341SER
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| Main parameters | Performance | Remark | |
| Minimum value | Maximum value | ||
| Power supply voltage (V) | 0 | 5.5 | More than 5.5V may permanently burn the module |
| Blocking power (dBm) | - | 10 | Low probability of burning when used close to the |
| Working temperature (℃) | -40 | 85 | Industrial grade |
| Main parameters | Performance | Remark | |||
| Minimum value | Typical values | Maximum value | |||
| Operating voltage (V) | 3.3 | 5 | 5.5 | ≥5.0V can guarantee output power, and if it exceeds 5.5V, the module may be burned permanently | |
| Operating frequency band (MHz) | 2400 | - | 2480 | Supports ISM bands | |
| Transmission power | -20 | - | twenty three | - | |
| Power consumption | Emitting current (mA) | - | 160 | - | Peak transient current @23dBm |
| Receive current (mA) | - | 6.8 | - | - | |
| Receive sensitivity (dBm) | - | -95dbm | - | ||
| Working temperature (℃) | -40 | - | +85 | Industrial design | |
| Main parameters | describe | Remark |
| Reference distance | 220m | Clear and open environment, height 2 meters, 4.5dBm, airspeed 1Mbps |
| Bluetooth protocol | Was 5.2 | - |
| Communication interface | USB | - |
| Product size | 60.0*18.0*8.5mm | ±0.2mm |
| RF interface | PCB onboard antenna | Equivalent impedance is about 50Ω |
| Product weight | 7.5g | ±0.1g |
Practical Application Scenarios
1. High-Performance Field Engineering Commissioning and Debugging
Field technicians often need to interact with remote, sealed industrial BLE sensors, actuators, or controllers mounted on tall structures or inside electrical cabinets. By plugging the EWM104-BT57UP into a standard USB port on an engineering laptop, the operating system instantiates a virtual serial COM port. Using standard serial terminal tools, the technician can communicate with BLE modules up to 220 meters away, executing real-time parameters and reading logs without opening industrial enclosures or physical wiring.
2. Medical Telemetry and Patient Vital Sign Data Aggregation
In clinical environments, multiple medical diagnostic units (such as digital blood pressure monitors, pulse oximeters, and patient monitors) operate continuously. These wearable or desktop devices stream high-priority metrics via BLE. An EWM104-BT57UP connected to the central nurse monitoring terminal operates as a master BLE node. It aggregates raw telemetry data from multiple patient sensors and translates the wireless payload into clean serial streams for processing by medical software.
3. Smart Warehouse Automated Data Capture and Inventory Scanners
In logistics centers, wireless hand-scanners, automated scales, and localized barcode readers require seamless PC connectivity. By integrating the EWM104-BT57UP as a dedicated Bluetooth 5.2 host controller, warehouse host PCs maintain low-power, high-availability connections with standard handheld devices. Operating in the busy 2.4GHz band, the BLE 5.2 physical layer ensures reliable, interference-resistant wireless transmission, updating central inventories instantly.
FAQ Section
1. Does the EWM104-BT57UP require any custom proprietary software drivers to instantiate the virtual serial port on a host computer?
No. The EWM104-BT57UP utilizes standard USB Virtual Serial Port (VCP) CDC-ACM architecture, which is natively supported by modern operating systems including Windows, Linux, and macOS. Once plugged into a USB port, the host operating system automatically assigns it a virtual COM port number, allowing developers to communicate with it using basic serial terminal software or custom scripts.
2. How do you configure and switch the EWM104-BT57UP between Bluetooth Master and Slave roles?
Role switching is achieved using universal serial AT commands. When connected to a serial debugger or host controller, engineers can issue simple ASCII string commands to query the current mode, switch the operational state from master to slave (or vice-versa), and configure connection parameters such as advertising intervals, connection intervals, and pairing pin codes.
3. What are the core security advantages of using a Bluetooth BLE 5.2 based adapter over legacy Bluetooth adapters?
BLE 5.2 introduces enhanced security features, including LE Secure Connections with ECDH (Elliptic Curve Diffie-Hellman) key pairing. This prevents passive eavesdropping and man-in-the-middle attacks. Additionally, BLE 5.2 features optimized power consumption management and improved channel selection algorithms to maintain data integrity in environments with severe 2.4GHz Wi-Fi congestion.
4. What is the maximum physical line-of-sight communication range of this USB adapter?
Under standard testing conditions in an open outdoor environment, the EWM104-BT57UP provides a highly reliable wireless communication distance of up to 220 meters. Inside typical office spaces or industrial plants, the actual range will vary depending on physical partition walls, concrete floors, and localized electromagnetic background noise.
