
Although the description says it is compatible with Arduino Pro Mini, it is not. DTR/RTS connections are incorrect. You will need this: https://www.amazon.com/SparkFun-FTDI-Basic-Breakout-5V/dp/B0068QKQEA/ref=sr_1_2?keywords=sparkfun+ftdi+breakout&qid=1564692723&s=gateway&sr=8-2