: It is a standard Bluetooth profile used for serial communication between a computer and a device (e.g., headsets, OBD-II scanners, or Arduino modules). Common Origin : The "JL" prefix often corresponds to chips from Zhu Hai Jieli Technology
This is a Bluetooth profile that allows devices to emulate a serial cable connection, enabling data transmission between the Bluetooth device and the computer, often used for debugging, firmware updates, or advanced control.
If you are currently setting up a project, tell me you are using and the exact model of your Jieli chip so I can provide the precise setup instructions. Share public link jl-spp driver
: Disable "USB Selective Suspend" in your Windows Power Plan to prevent the port from sleeping.
because the manufacturer may not have provided a WHQL-certified driver for that specific hardware ID. : It is a standard Bluetooth profile used
import serial ser = serial.Serial('COM5', 115200, timeout=1) ser.write(b'AT+VERSION\r\n') response = ser.readline() print(response)
macOS lacks native jl-spp drivers. Use a third-party serial driver like (incompatible with Jieli) – but the best solution is to use a USB-to-Serial converter (FTDI) between the Jieli module and your Mac. Alternatively, run Windows via Boot Camp or a VM with USB passthrough. Share public link : Disable "USB Selective Suspend"
Resource conflict or corrupt driver cache.