Jq-bt Bluetooth Driver -

The driver is a simple UART-based command parser supporting:

Basic driver functions:

void jqbt_init(uart_handle_t uart);
void jqbt_send(uint8_t* data, uint16_t len);
void jqbt_recv_callback(uint8_t byte);
void jqbt_enter_data_mode(void);
void jqbt_exit_data_mode(void); // usually "+++" escape sequence

Because this model number is generic, it typically refers to one of two things: jq-bt bluetooth driver

Most of these devices utilize standard Bluetooth chipsets from manufacturers like CSR (Cambridge Silicon Radio), Broadcom, or Realtek. They generally do not require a specific, proprietary driver CD to function.

Pinout Example (JQ-BT100): | Pin | Name | Function | |-----|------|-----------| | 1 | VCC | 3.3V input | | 2 | GND | Ground | | 3 | TX | UART transmit (to host RX) | | 4 | RX | UART receive (to host TX) | | 5 | STA | Status LED / connection state | The driver is a simple UART-based command parser supporting:

Most JQ-BT dongles work out of the box with Linux kernel 5.4+. However:

# For Realtek JQ-BT 5.0
sudo apt install firmware-realtek
sudo modprobe btusb
# For CSR chips
sudo apt install firmware-csr
sudo systemctl restart bluetooth

If it fails, you may need to download the rtl8761b_fw.bin and rtl8761b_config.bin files to /lib/firmware/rtl_bt/. Because this model number is generic, it typically

The JQ-BT module can be driven as a standard HCI UART device using the hci_uart driver.

Driver stack:

Application → BlueZ (libbluetooth) → HCI Socket → hci_uart.ko → UART driver → JQ-BT hardware

Kernel modules involved:

The JQ-BT driver is notorious for defaulting to aggressive power saving, which kills connection stability.