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Amazon.com: DIYmall 3PCS CP2102 USB to TTL Serial Module with DTR Pin, Converter Adapter STC Downloader Module for Arduino, ESP32-cam, GSM Relay, Pro Mini, Nextion Display, Beitian GPS : Electronics
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Amazon.com: DIYmall 5V USB to TTL Serial Cable Adapter + Optical Fingerprint Reader Sensor Module for Arduino 2560 R3 Raspberry Pi ESP8266 ESP32 51 AVR STM32 Red Light : Electronics
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