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I have an FTDI dongle with a jumper for 3.3v (or 5v) operation. I connected my 201 as follows:

GND -> GND
VCC -> 3.3v
TXD -> RX
RXD -> TX
DTR -> IO0
RST -> VCC (or GND to reset)
CHIP_EN -> VCC
IO15 -> GND

With these settings, the serial monitor in the Arduino IDE (v 1.6.11) can connect to it at 74880 baud.