I have 2 Arduino Pro Mini 328 - 5v/16Hz. I’m having an uploading issue with one of them. The one I can’t get my sketch to upload to it. Because I have 2, and it works for the one, this makes me think its the arduino, and not my PC or cable. This is what I’m using:
Arduino Pro Mini 328 - 5v/16Hz
Sparkfun FTDI basic breakout board
Have the latest driver
Have the latest version of the arduino software
Here’s the “arduino is not communicating” error code I got:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
I did notice something strange with the non working arduino. When I first plug in the FTDI board and its powering the arduino, the arduino cycles like the other one that works, but once its done with its boot-up, the pin 13 LED flashes at a staggered rate, starting fast and ending extremely fast with the LED becoming progressively brighter until it stops, after about 3 seconds. This flashing pattern also happens after I hit the reset button on the arduino as well.
Any guesses as to what could be wrong?