For quite some time when you buy FTDI FT232RL chips from shady suppliers you have a good chance of getting mysteriously buggy chip which only works with drivers 2.08.14 or earlier. We’ve got a pair of such FTDI FT232RL chips – one genuine and one fake and decided to check if there is an internal difference between them. On the following photo – left one is genuine, right one is fake. One can notice difference in marking – on genuine chip it’s laser engraved while on buggy it is printed (although this is not a universal distinguishing factor for other chips).
We source only genuine FTDI chips so not a problem for any Adafruit made products!
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