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![CP2102 module USB to 3.3V TTL [CP2102 module] - US $1.80 : HAOYU Electronics : Make Engineers Job Easier](http://www.haoyuelectronics.com/Attachment/CP2102_module/CP2102_0.jpg "CP2102 module USB to 3.3V TTL [CP2102 module] - US $1.80 : HAOYU Electronics : Make Engineers Job Easier")