Introduction: Turn Arduino Into USB to TTL Adapter With 1 Wire

A standard Arduino includes a USB to TTL chip
so we can make it as a adapter

Step 1: One Thing You Have to Do

what we have to do is to plug one wire between RESET & GND

easy, dosen't it?

Now, you can use RX (pin 0) and TX (pin1) to communcate~~

Step 2: How It Works?

after you plug the wire,
this change the MCU into "Reset Mode"
so now only  FTDI chip work on your arduino board!!


turbiny (author)2015-06-10

can i use this board in the same way?
new to arduino


yes i think.

cydiageek101 (author)2016-03-28

Did it on a arduino nano. no pictures though

gustavo.atzingen (author)2015-01-18

Do not work with uno r3 (no FTDI chip ?). Works with arduino mega and two serial port, one recebing and sending to native USART serial (pins 0 and 1).

FongangD (author)2014-11-03

Trying to do this with a DFRDuino and it does not seem to allow me to program an Arduino Pro Mini

pferruscamonroy (author)FongangD2015-01-13

you have to remove the atmega microcontroller to program an Arduino mini or minipro with a bigger one and use 0 and 1 pins (Tx, Rx)