Работа с BlueTooth, профиль SPP. - Microsoft Q&A
chipsets, which are widely used in Bluetooth speakers, headsets, and low-cost IoT devices. jl-spp driver
One of the most common use cases for the JL-SPP driver is in conjunction with the Jieli "GMA" or "ISP" tools. For example, when a developer needs to update the firmware on a Bluetooth speaker to add new features or fix bugs, the JL-SPP driver ensures the data packets are transmitted reliably over the wireless link. Without the correct driver, the software will fail to "see" the device, even if it is paired with the PC. Работа с BlueTooth, профиль SPP