Hi guys. Its been quite a few years since ive had time to mess with my arduino stuff. Just started playing again.
Anyway, i have 2 Arduino Pro's. 1 is a 3.3v 8mhz and the other im not sure. None of the boxes are colored in on that one so i have no idea what it is. What would this device be?
The 3.3v one im able to install and run programs, the other one i cant do anything with. I assumed that i had bricked it as i was playing with my AVRISP Mk2 clone several years back and i assumed i borked the fuses or something.
I got my AVRISP out and attempted to connect to it and read the fuses or even erase it, but no joy. I then suspected my AVRISP wasn't working properly so i erased my good Pro and then reloaded the boot loader and it works fine.
Now i understand that fuses can bork the arduino if programmed wrong, but when i plug it in it fires up and blinks the led, so im guessing that it has a clock so im at a loss as to whats wrong so i have no idea how to recover it. I understand its only a couple bucks, but i'd like to recover it if i can.
ps. side note: i wonder if it is a 5v device? No info on it.
None of the boxes on the pro mini's (which I think it what you're talking about) I have received EVER had ANY of the boxes filled in.
In hindsight, when you got the board and took it out of the package (at which time you know what it is), you should have marked the back of the board for your future reference.
You should definitely try the following configurations:
5v @ 16MHz Pro Mini - this and 3.3v @ 8MHz are the two common versions.
Arduino Uno - in case you bootloaded a 5v@16MHz board as an Uno. Many people do this (it works fine afterwards if you tell the IDE it's an Uno), in order to get the superior Optiboot bootloader, which takes up less flash and doesn't get stuck in a reset loop if you do a WDT reset.
So you say you can't program it via ISP programmer? What error? Could it be that the board is just straight up dead?
If you bricked the board with wrong fuse settings, just throw it out - you need an HV programmer to unbrick, but with pro mini clones costing less than a cup of coffee, it just ain't worth it. HV to unbrick is worth it if you already have the HV programmer or fuse doctor, or if you've got $100+ in bricked boards (for example, if you had a custom board, mass uploaded firmware, and then realize you put the wrong fuse settings, and had a big pile of bricked custom boards)