Counterfeit boards bear marks that make them look like Arduino.cc-produced boards.? (Much like counterfeit watches marked as "Rolex.")? People can get tricked into buying boards with a USB, or other chip, that makes them compatible only after they download special drivers, etc.? If a company produces an Arduino clone they should mark it as such.? They also should note that a given board is compatible with an Arduino XXX, but is a product not of Arduino.cc but of another company.? Be careful what you buy and read the specifications carefully.? Just my opinion from experiences with Arduino boards.
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Jon Titus, KZ1G
Herriman, UT USA