Interface interface: RS232. Whether the TTL level is converted to RS232 and connected to the computer serial port. RS-232 interface Bluetooth adapter with embedded Bluetooth protocol stack. The main function of the product is to replace the traditional serial cable connection.
eBay
Wireless M.2 A+E Key Slot To M.2 M Key Wifi Bluetooth Adapter For Intel AX200 9260 bcm94352Z Card NVMe PCI express SSD Port
Aliexpress UK
Using the currently widely used Bluetooth BLE technology, the Bluetooth master device realizes serial communication with the serial device connected to the BT580 by monitoring and writing the Bluetooth characteristic values inside the BT580.
eBay
New USB to RS232 COM Port Serial Port 9 Pin DB9 Cable Serial Adapter Convertor With Female Adapter Supports for Windows 8 No CD
Aliexpress UK
Bee Adapter is a compact USB to serial adapter equipped with BEE (20pin 2.0mm) sockets. With integrated FT232RL IC, It can be used for programming or communicating with board which basic Arduino but without USB interface, like Sniffer Nano.
eBay
RJ45 to 9-pin female adapter,RJ45 to DB9pin male DB9 female RJ45 to RS232 network port to serial port DB9 pin
Aliexpress UK
Bee Adapter is a compact USB to serial adapter equipped with BEE (20pin 2.0mm) sockets. With integrated FT232RL IC. The Adapter also could support XBee interface. Usage 1: PC via a USB cable directly connected with XBee adapters.
eBay
SAS Serial Attached SCSI SCSI SFF-8482 to SATA power cord 29-pin serial port cable converter HDD hard disk SAS to SATA adapter
Aliexpress UK
Interface interface: RS232. Whether the TTL level is converted to RS232 and connected to the computer serial port. RS-232 interface Bluetooth adapter with embedded Bluetooth protocol stack. The main function of the product is to replace the traditional serial cable connection.
eBay
New USB 2.0 to RS232 COM Port Serial Port 9 Pin DB9 Cable Adapter Convertor With Female Adapter With CD For Windows 10/98/7/8
Aliexpress UK
Interface interface: RS232. Whether the TTL level is converted to RS232 and connected to the computer serial port. RS-232 interface Bluetooth adapter with embedded Bluetooth protocol stack. The main function of the product is to replace the traditional serial cable connection.
eBay
FT232RL FTDI USB 3.3V 5.5V to TTL Serial Adapter Module Debugger Download Cable To Serial for Arduino FT232 Mini Port
Aliexpress UK
The product for the USB serial port + HC06 bluetooth main module combination, operation USB can be turn a serial port from a bluetooth module to send and receive data. with four module, bluetooth status indicator light BT respectively, and the USB serial port ready indicator light D3, receiving and transmitting light TX and RX.
eBay
C90C DTECH Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect PC and RS-232 Device
Aliexpress UK
Type:AM-50S Bluetooth Virtual Serial Port Adapter. Colour:Random Color(Color is random, no specification is accepted). 1 Adapter.
eBay
IDE To SATA Hard Drive Conversion Card, SATA To IDE Adapter Card, 2.5/3.5-Inch Hard Drive To IDE Serial Port To Parallel Port
Aliexpress UK