Duet wifi 2 not connecting WIFI and USB
Before I tell you about my issue let me just do a intruduction. In last year I have been trying to devoloped a "All-in-one" machine, for now just CNC, 3D printer and laser engraver. I first did the machine working as a 3D printer and it was working perfect, I then decided to add the CNC fuction, here is where I started having issues.
I was trying to make E1 working as the signal for M3/M5 and some weeks ago this was working, my only problem was I nedeed the PWM signal from E1 to be 12V and my bord is working with 24V, this to be able to control the speed from Duet, so I added a MOSFET to reduce the voltage from 24V to 12V, for stupidity I forgot to add a pull down resistence and only noticied that after about 2h of testing. Before all of that I should let you know that I might have done a shot-circuit on E1 because my 7.5A fuse did blowned up (This was last week too). Returning to the MOSFET in this time I realised that E1 was always turned on as soon as I powerd VIN. I even removed it from the g-code and the issue as there. As Duet as a lot of Heaters I tought I did blown up the E1 output and then decided to do the exact same thing but this time using a heater controller from the pins in the expasion header. During the test the wifi stoped working, I then connected duet via USB (with VIN off) and the exact same happenned, I then realize the 3.3V led was powered off, I then did all the steps there I found in a guide to try to solve the problem, nothing worked even after removed the sd card, I decided to measure U2 to see if there was 3.3V coming on the ouput, and soon as I mesured it the 3.3V led turned ON. (Weird for me).
The actual issue: Now when I power duet wifi 2 via USB cable the 3.3V led lights up, the 5V lights up, the wifi won't turn on, the DIag led won't turn on too, with or without sd card, tried to do the erase step all files are still on the sd card and everything is the exact same thing. I don't know if it matters or not but sometimes when I plug the usb cable the endstop lights next to the steepers ligths up, and I am doing all this test with everything disconected. PC can't recognise that I pluged a USB too, so I can't send any comands to Duet. I belive something is burned I am just hopping is something I can fix without having to buy a new Duet.
Sorry for the big text.
Sounds like it may be damaged.
Can you post some close up, well lit, photos of the board in case we can spot any damaged chips?
When connected to USB power only, do you notice if any chips get hot?
If you've done the reset jumpers (assuming it's working at all) the firmware will have been erased and you'd need to reflash it with Bossa, but if it's not showing up as a bossa port in device manager that's a problem. Try alternate USB cables just in case.
How far do you get when going through this document?
@Phaedrux Thank you very much for your reply, I have attached some photos, I forgot to metion that I never saw smoke coming out of the board.
The CPU is getting hot when I connect the board via USB.
I did everything I could in the guide, as the jumpers are not working (tested again just now). Change the USB cable was one of the first thing I did, but this cable works fine with my other Duet Wifi 2.
I don't see any smouldering cratters, but failures aren't always visually catastrophic. The fact the CPU is getting hot with only USB connected isn't a good sign.
Can you try again but with the SD card removed, just in case?
@Phaedrux Sorry for the late reply, I just did, and all the same. I'm not an expert but I found it wierd too, I just ordered a new Duet wifi 2 hope this time I dont screw up, but I would still like to know what's going on as I could use it in other machine (That's the idea anyway).
I don't know if this gives any bell, but I believe it's important to notice that before it stoped working my E1 was always on as soon as I applied the 24V on VIN.
Even if that says nothing to you, thank you very much for the help!
Alfredo last edited by
I have the same problem.
I've done a short circuit and then my Mac din't recognize my Duet WiFi.
When I plug the USB cable U11 get very hot, so I've decided to replace it. I'll let you know if my repair works