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you have to wire the 2 'top' and 2 'bottom' terminals in a 'criss-cross' fashion
The sensor module consists of a rain board and a separate control board for easy installation and flexibility
it must be purchased separately
Crafted with high-quality materials for durability
FM220U Finger Print Scanner Soldering Kits you have to wire theFM220U Finger Print Scanner FM220U is a CMOS based optical reader with high quality. It can capture images and verify fingerprints with high speed. FM 220U has used in enrollment and attendance verification applications as a stand alone or embedded device.
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