I highly recommend these, I bought others from another seller and spent a lot of time getting them to work and they didn't work, replaced them in the same configuration and worked immediately, no fuss! Use *3.3V* FTDI. Make sure you have a good cable and a quality FTDI adapter that provides stable power. to start your application. Don't forget to turn off the power after every configuration change (IO0 change) and you're done.
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