[SOLVED] Cannot uploading code to Arduino board

Hardware
1

Hi all,
Every time I try to access the serial USB port of my Arduino board that it call /dev/ttyACM0,
It will disconnect the serial port and then reset the port, that leads to an error like this.

Arduino: 1.8.19 (Linux), Board: "Arduino Uno"

Sketch uses 924 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
An error occurred while uploading the sketch
avrdude: ser_open(): can't open device "/dev/ttyACM0": Input/output error

And this the debug message that I can see

[  817.675157] usb 1-1.3: Product: Arduino Uno
[  817.675159] usb 1-1.3: Manufacturer: Arduino (www.arduino.cc)
[  817.675161] usb 1-1.3: SerialNumber: 12354501101136710365
[  817.675875] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
[  829.621381] usb 1-1.3: USB disconnect, device number 13
[  838.018752] usb 1-1.3: new full-speed USB device number 14 using ehci-pci
[  838.117514] usb 1-1.3: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
[  838.117531] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=220
[  838.117537] usb 1-1.3: Product: Arduino Uno
[  838.117541] usb 1-1.3: Manufacturer: Arduino (www.arduino.cc)
[  838.117545] usb 1-1.3: SerialNumber: 12354501101136710365
[  838.118576] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
[ 1409.984337] usb 1-1.3: reset full-speed USB device number 14 using ehci-pci
[ 1415.237928] usb 1-1.3: USB disconnect, device number 14
[ 1415.314078] usb 1-1.3: new full-speed USB device number 15 using ehci-pci
[ 1415.416354] usb 1-1.3: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
[ 1415.416362] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=220
[ 1415.416365] usb 1-1.3: Product: Arduino Uno
[ 1415.416367] usb 1-1.3: Manufacturer: Arduino (www.arduino.cc)
[ 1415.416369] usb 1-1.3: SerialNumber: 12354501101136710365
[ 1415.417486] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device

And I have loaded cdc_acm and ch341 also, but can not solve the problem. Maybe it is the fault of the board?
Thank all.
P/S: My board is Arduino Uno R3, using ATmega328P

2

There are several things that come to mine. Try this:
Type 'groups', is 'dialout' there, if not do the following ?
sudo usermod -a -G tty yourUserName - sudo usermod -a -G tty gil
sudo usermod -a -G dialout yourUserName
Log off and log on again for the changes to take effect. (I just restart)

I found this in my notesL"Run the dmesg, is there any reference to BRLTTTY? If yes, uninstall BRLTTY or create udev rules to disable it. It has been mentioned a few times on the forum, a search for BRLTTY should give you the pointers how to do it.

Note that dmesg output can be very long; I'm not sure when BRLTTY will show up, possibly just after the detection of your board. In that case, you can use dmesg -w (use C to abort).

3

After I run ls -l /dev/ttyACM0

crw-rw---- 1 root uucp 166, 0 Oct 18 09:10 /dev/ttyACM0

And my user is in uucp group.
I have searched for the "BRLTTTY" but no result found.
This is the message for dmesg -w

[  521.407186] usb 1-1.2: reset full-speed USB device number 8 using ehci-pci
[  526.660843] usb 1-1.2: USB disconnect, device number 8
[  526.733725] usb 1-1.2: new full-speed USB device number 9 using ehci-pci
[  526.832663] usb 1-1.2: New USB device found, idVendor=2341, idProduct=0043, bcdDevice= 0.01
[  526.832671] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=220
[  526.832674] usb 1-1.2: Product: Arduino Uno
[  526.832676] usb 1-1.2: Manufacturer: Arduino (www.arduino.cc)
[  526.832678] usb 1-1.2: SerialNumber: 12354501101136710365
[  526.833468] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device
4

Are you sure you have a good USB cable, an intermittent would will do that as well. Try another cable and board, then if that works narrow down to the problem child.

5

After I tried the new board, everything worked fine. So the problem is the fault of the board. Thanks for your responsibility!

6

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