WCH BLE Analyzer Pro is a USB-based Bluetooth Low Energy (BLE) sniffer and debugging tool designed to capture, decode, and analyze BLE communication packets in real-time.
The analyzer supports adjustable polling intervals, broadcast and connection packet tracking, address filtering, and detailed packet inspection with statistics and graphical representation. It can monitor BLE broadcast and connection data in real-time and includes functions such as PHY mode selection and whitening control. These features enable low-level monitoring of BLE communication, help identify transmission issues, and verify protocol behavior. Applications include use in R&D, testing, and debugging of Bluetooth-enabled products such as IoT devices, wearables, and sensors.
WCH BLE Analyzer Pro specifications:
- Main chips – 3x CH582F Bluetooth LE RISC-V microcontrollers, and a CH334 USB hub (see board photo at the end of the post)
- Supported protocol – Bluetooth Low Energy (BLE) 4.0/4.2/5.0
- Capture range – BLE advertisement and connection packets
- Frequency band – 2.402 – 2.480 GHz
- PHY modes – 1 Mbps, 2 Mbps (BLE 5.x compatible)
- Whitening support – Optional whitening enable/disable
- Calibration – Adjustable frequency calibration value
- Listening frequency – Selectable channel frequency
- Access address filter – Configurable
- Packet filtering – By address, channel, or connection
- Display features
- Real-time packet decoding
- Broadcast and connection info view
- Detailed packet breakdown
- Statistics summary window
- USB
- USB Type-C port for USB host connection
- USB Type-A port works as a USB Hub
- Misc – Run/Stop button
- Operating Voltage – 5V (via USB)
- Dimensions – 91.00 mm x 64 mm x 15 mm (Including antenna)
- Operating Temperature – 0°C to +70°C (typical)
The device works on Windows 7 to 11. It connects through USB and captures BLE advertisement and connection packets in real-time. The software supports 1 Mbps and 2 Mbps PHY modes and allows users to set parameters such as access address, whitening, polling interval, and listening frequency. It includes options for packet filtering, viewing detailed packet data, and saving or exporting captured results. A computer with an Intel Core i5 processor and 4 GB RAM or higher is recommended for best performance.
In the past, we have written different types of protocol analyzer and debugging tools like the EZ32 ESP32JTAG, the ESP32-C3-powered Spark Analyzer, and the LibreVNA USB vector network analyzer (VNA), but it’s not often we come across a Bluetooth protocol analyzer. The last one we covered was the Ellisys Bluetooth Vanguard back in 2019.
The WCH BLE Analyzer Pro is available on AliExpress for $20.08, but we first discovered it on the Olimex store for €35.95 (about $41). More information about the product can be found on the download page for the software, whose ZIP file also includes a user manual in English and simplified Chinese.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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