sudo rfcomm bind /dev/rfcomm0 <remote_MAC> 1
The JQ-BT driver is notorious for defaulting to aggressive power saving, which kills connection stability.
The JQ-BT Bluetooth driver is a software component that enables communication between a computer and Bluetooth devices. This guide provides an overview of the JQ-BT Bluetooth driver, its features, and step-by-step instructions for installation, configuration, and troubleshooting. jq-bt bluetooth driver
After successful SPP connection, module enters transparent serial mode. All data received on UART is sent to remote device, and incoming Bluetooth data is output on UART.
Escape sequence to return to AT mode: +++ (with 1-second guard time before/after). sudo rfcomm bind /dev/rfcomm0 <remote_MAC> 1 The JQ-BT
If you are running an older OS, the device may not install automatically.
The driver is a simple UART-based command parser supporting: If you are running an older OS, the
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
Critical Warning: Do not use "Driver Updater" software from pop-up ads. Do not download from driver-download-dot-com. These often contain malware or old, broken drivers.
Here are the legitimate sources:
Many JQ-BT adapters share the 2.4 GHz band with Wi-Fi.