All you need to do to start with is remove the Uno from the CNC machine -completely!!
Put the jumper on the FTDI module to 5v and hook it up to the Uno using my instructions:
And then run avrdude -c arduino -P /dev/ttyUSB0 -b 19200 -p m328p -U flash:r:dump.hex:i from your PC the FTDI module is connected to.
IF you can pull the hex dump, you’ll be buying a new UNO and uploading the hex to that.
If not, we will revisit things we can do.
let me see if i’m understanding this correctly and correct me if i’m wrong, you are only trying to dump the hex code right? i thought you were saying that this module could be a solution for the faulty usb connection, you want me to connect the module so i can dump the hex code from the board so i can re assemble it and upload it into another board?
also english is my second language maybe some things are lost in translation.
thanks for the help you are providing, it’s been very helpful.
also, the code that you quoted, i have to use the arduino ide software to use it right?
If you can’t dump the hex, it can be made to work as a replacement, but I would advise trying to dump the hex first as it is a bit of a better and more permanent fix to replace the UNO.
What caused the 16u2 to blow up? What has that damaged? What is going to wear out next because of that?
run it from a linux PC:
sudo apt update
sudo apt install avrdude
and then run avrdude -c arduino -P /dev/ttyUSB0 -b 19200 -p m328p -U flash:r:dump.hex:i in your terminal.
Not the IDE
this conversation is really funny because i respond and in the same time you edit your response and respond with whatever thing i’m asking when i’m writing and then it looks like i’m repeating the same thing you have already said after editing 
don’t worry tho i will try to get that module and then try to do all that (i also work so i’m kinda busy atm) so maybe i will be putting you up to speed next week most likely or maybe later than that.
thanks for all the info my friend
Yeah I’m unfortunately a bit like that, I press reply too fast before I’ve finished thinking it through.
No stress, I also work
Colloquialism. It stopped working hence it has blown up. No actual explosions.
i know but i’ve seen (in this forum) one that did
last question (it won’t be the last) if want to dump the code i have to use 5v to power the board right? what do you recommend, using 3v and power the board with let’s say a 9v battery or use the module and the 5v output to power the board without an external power supply?
Follow this:
Power it from the FTDI module. Keeps everything simple and safe
I have deleted your other cross-post @Siniestro.
Cross-posting is against the Arduino Forum rules. The reason is that duplicate posts can waste the time of the people trying to help. Someone might spend a lot of time investigating and writing a detailed answer on one topic, without knowing that someone else already did the same in the other topic.
Repeated cross-posting can result in a suspension from the forum.
In the future, please only create one topic for each distinct subject matter. This is basic forum etiquette, as explained in the "How to get the best out of this forum" guide. It contains a lot of other useful information. Please read it.
Thanks in advance for your cooperation.
