These are well made and packaged Nano boards. So far I've only done limited testing on one unit, but with very positive results. I'll update this review after more testing. The only issue I encountered was that I could not initially connect to the boards even with the most current Arduino IDE software on either a MAC or Windows computer. Research showed that these boards require the CH340G driver. I found excellent information and links on the driver at a web site that includes the text "How To Use Cheap Chinese Arduinos".
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