Arduino UNO on COM3 [Not Connected]
Hi guys, I can't connect my Arduino to my computer. The ON light is on, so it has power. The device just doesn't connect. I have a newer Alienware laptop. The device doesn't even show up in the device manager.
8 Replies
What board? Is your USB cable "power only"?
The board (whatever one you have) must show up in Device Manager under Ports before you can use it.
The thing is, is that I’ve used the board and cable to upload code and run projects. It’s just that it’s not working now. I think it’s a hardware problem with my arduino. I might’ve short circuited something.
it might be you have a faulty cable or board
i'd recommend replacing the cable first and then the board
Have you disconnected everything else??
But the programmer
Also
!avrdude
Solving AVRDUDE communication errors (Try these in order)
1. Is your Serial monitor open?
If it is, close it. this allows your IDE to upload sketches without conflicts with the Serial Monitor.
2. Have you selected the right port in your IDE?
You could have selected something that is not your Arduino. Change the port in the Arduino IDE by going into Tools -> Port.
3. Have you selected the right board in your IDE?
You need to select the right board and model.
4. Does the Power LED on your board light up?
If it does, unplug and re-plug your board, then check for blinking LEDs. If only the Power LED or no LEDs light up ask for further assistance (not for all boards).
5. Do you have a Nano or other Atmega 328p based board?
If so, try using the old bootloader. In the Arduino IDE Go to Tools -> Processor and select 328p(old bootloader). If your board doesn't have an Atmega 328p, you can skip this step.
6. Does your onboard LED blink when you press the reset button?
Try pressing the reset button on your Arduino, if the onboard LED doesn't blink when you reset, you probably have a broken bootloader, you can check out this tutorial on how to burn the bootloader.
7. Is anything connected to your Tx and Rx pins?
If there is, try removing everything connected to them.
8. Is this a problem on your computer's side?
This might be a problem on your computer's side, so try restarting your computer.
9. Are you running Linux?
If you are running Linux, try checking which groups you belong by using the
groups command, then look at which group you need to be in with ls -l /dev/ttyACM*, ls -l /dev/S* or ls -ls /dev/USB* (replace the * with your port number), then use this command:- sudo usermod -a -G <group> <username> and add your user to the necessary groups.10. Are your drivers installed?
Check your drivers, sometimes just reinstalling them works. If you are using a clone board, you might have the CH340 USB-Serial chip, which isn't supported by default. You can check by looking at your board and checking the SMD USB-Serial chip's name (not the big one). Click here to learn how to install CH340 Drivers. If you have an FTDI chip, This website will show you how to install their drivers. If you don't have either we recommend googling the USB-Serial chip that your board uses.
11. Is your cable faulty or capable of sending data?
Some USB cables arent capable of transferring data, and some may be faulty, so make sure to try a different one to see if it works!
12. Is this a problem with your IDE?
If you think that's the case, try reinstalling the IDE.
Arduino Bot • Submit bugs on GitHub!
And if not authentic, load driversb
I had this problem, and it only happened after I pumped it with too much power, so you might have just fried it.
Totally fried it lol yeah
Had to order a new one
Also the servo was an old rc car one from a broken car that I didn’t know was broken
All is well now yall thanks for the help