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Mini FT232RL FT232 bluetooth Bee USB to Serial IO Port XBee Interface Adapter Module Nano 3.3V 5V Geekcreit for Arduino - products that work with official Arduino boards
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FT232RL FT232 BTBee Bluetooth Bee Mini USB to Serial IO Port Xbee Interface Adapter Module for Arduino _ - AliExpress Mobile
USB to RS-232 DB9 1-Port Serial Interface Adapter - Sealevel
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