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$20 to $100 A GPIO port handles both incoming and outgoing digital signals. As an input port, it can communicate to the CPU the ON/OFF signals received from switches or the digital readings received from sensors.
$7 to $30 Their purpose is to connect wired network hardware in an Ethernet LAN, (MAN), or (WAN).
Subtotal: $75.50
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eMMc
1 × $75.00 
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