If your Bluetooth device isn't working at all, the unknown JL_SPP entry might be a sign of a larger driver conflict. Right-click the Start button and select Device Manager entry, right-click it, and select Uninstall device
If the error appeared after plugging in a phone, try using a different USB-C port or cable, as some ports may fail to properly initialize proprietary serial interfaces.
Unlike standard Bluetooth SPP (e.g., on CSR or Broadcom chips), JL’s implementation is . Trade-offs include:
Resource conflict or corrupt driver cache. jl-spp driver
If you are a developer, the "JL_SPP" entry is a doorway to advanced Bluetooth communication. Jieli provides extensive Software Development Kits (SDKs) for developers to build applications for their Bluetooth chips.
, a major Chinese manufacturer of low-cost Bluetooth chips used in thousands of wireless speakers, headsets, and car FM transmitters. stands for Serial Port Profile
How to Update SPP Drivers on Windows 11
The is a specialized USB-to-Serial communications driver. It allows a computer operating system (usually Windows) to recognize and talk to JieLi (JL) Bluetooth microcontrollers over a standard USB cable. Breaking Down the Name
This comprehensive guide will explain what this driver does, why it appears on your system, and how to safely troubleshoot or ignore it. What is the JL_SPP Driver?
2. Device Appears as "Unknown USB Device (Device Descriptor Request Failed)" If your Bluetooth device isn't working at all,
An outdated master Bluetooth controller driver can cause failures when mapping sub-profiles like SPP.
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| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Pairing succeeds, no COM port | Windows lacks JL-SPP driver | Install vendor’s INF driver | | Data corrupted or slow | Baud rate mismatch on UART | Match baud rate between JL chip and host MCU | | Connection drops after 30 sec | Power saving mode on JL chip | Disable deep sleep in firmware (if you have SDK access) | | “Driver not signed” error (Win 10/11) | JL’s INF lacks WHQL signature | Boot Windows with driver signature enforcement disabled, or use a signed generic SPP driver | , a major Chinese manufacturer of low-cost Bluetooth