The main limitations are (in older models), limited throughput (typically ≤ 115.2 kbps), and no official Bluetooth SIG certification. Still, for low-cost serial cable replacement, JQ-BT remains a viable choice.
Popular for DIY speaker projects, these boards support USB, TF cards, FM radio, and Bluetooth audio streaming. jq-bt bluetooth driver
If the device appears with a yellow exclamation mark in your settings: Right-click the button and select Device Manager . Locate Bluetooth or Other Devices . The main limitations are (in older models), limited
sudo jq-bt --scan --filter "addr == DE:AD:BE:EF:CA:FE" --output json limited throughput (typically ≤ 115.2 kbps)