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Amazon.com: Comimark 1Pcs RS232 Bluetooth Serial Adapter Communication Master-Slave Module 5v Mini USB : Electronics
LM068-1100 Bluetooth® 5.0 Dual Mode RS232 Serial Adapter (AO)
Long Range 100m Bluetooth 3.0 RS232 Serial Male Adapter with Bluetooth Class 1 External Antenna DB9 Pin for Data Transfer Serial Port Wireless Adapters - Newegg.com
LM048SPA2 RS232 Serial Cable Eliminator, Bluetooth Adapter
RS232 Bluetooth serial converter, Serial Bluetooth Adapter RS232
Reviews: Bluetooth Serial Adapter RS232
RS-232 Serial to Bluetooth Adapter
Mettler Toledo® 30086495 Paired Bluetooth RS232 serial adapter ADP-BT-S for wireless connection
Bluetooth RS232 Serial GRIDBluFly Pair - 110V - U.S./North America - DCE (2 Female) – Grid Connect
DIY Wireless Serial Adapter Speaks (True) RS-232 | Hackaday
100m Class 1 RS232 Bluetooth Serial Adapter Link for CNC Machines, PDA, Laptop, or Other Bluetooth Device - China Bluetooth Serial Adapter and RS232 Bluetooth Dongle price | Made-in-China.com