The Arduino Pro Mini is a great microcontroller board based on the ATmega328. The board comes without built-in USB circuitry, so an off-board USB-to-TTL serial convertor must be used to upload sketches. This can be a FTDI TTL-232R USB – TTL Level Serial Converter Cable for the 5V Arduino Mini Pro), or a FTDI TTL-232R-3V3 USB – TTL Level Serial Converter Cable.
In this post we will see how to upload sketches to the Arduino Pro Mini using an Arduino Uno.
Step 1:
Remove the ATmega328 microcontroller from the Arduino Uno Board.
Step 2:
We’re going to use the following pins to connect to the Arduino Uno.
Pro Mini -> Arduino
DTR to Reset
TXD to TX
RXD to RX
VCC to 5V
GND to GND
Step 3:
Make the following changes in the Arduino IDE
Step 4:
Compile and upload your sketches
