Installed Uni R3 fine and started Projects Book. Since - have been unable to use. Read related issues n forum.
In IDE (2.3.6) 'No board installed' and 'Board not detected' - the Tools>Ports menu command not available (greyed out). In device manager, no Arduino under Other or Unknown devices, therefore cannot update drivers.
New USB cable just tried, no joy. Green power light on the board and one blinking green light. Tried different usb post with cable. Running Windows 11.
Eek... that either means missing driver, bad cable, bad Uno or bad USB port.
Verify the USB port works by plugging in something that is a USB device.
Verify the cable by using it to communicate with another device (print something?)
Verifying the Uno ... the green power LED is good... the blinking "L" LED shows the factory code that was loaded... your Uno is probably good.
The Uno on the USB port will show as a DEVMAN >> PORTS >> COM device (not a USB device)... Do you know if you have an original Uno, or a knock-off (like mine)? My device manager shows my Uno/Nano as "USB Serial CH340"... the CH340 is the driver I installed to have the computer talk to the Uno/Nano... did you install a CH340 driver (if your Uno is a knock-off)?
I would guess your Uno is a knock-off and your computer (and the other computer) do not have the CH340 driver... (I am searching the internet for a link)
OK. USB ports work, with mobile phone data for example.
Cable does work with a printer, brand new too.
Yes green power LED comes on as soon as it’s plugged into USB. Blinking L flashes too.
Here is the link I used... it's been around for a while... there is a lot of reading... but eventually there is the link to the software for download... install... reboot... report what you find.
Installed the CH340 drivers. No change - still with Uno undetected.
A few points: the chip does not appear to be CH340, with ATMEL written on it. It did all also work at the beginning - a ran the first few Projects.
In device manager I still have no Ports listed …
In the IDE - Uno board selected at the top - under Tools >>Ports the option is greyed out. No chime on plugging in the USB and Uno in either of my USB ports. Two cables being tested.
I’m baffled to say the least? Any other ideas??? Cheers.
The green LED indicates power; it's directly connected to 5V and GND (through a resistor).
One yellow LED is the L-LED and on an official Uno is driven from the 328P via an opamp. It depends on the code that was loaded what happens with that LED; if it wasn't used in the code the LED will be on.
The other 2 yellow LEDs are connected to the 16U2. The Tx LED should be off if the Uno is not sending anything. The Rx LED will light up if the Uno receives data over USB.
If you keep the reset button pressed the 328P will be in reset and not send anything to the 16U2 and the Tx LED should be off. If that does not happen there is a (good) chance that you have damaged that IC (e.g. connecting a 9V battery to the 5V input instead of Vin or the barrel).
You can try to flash the firmware of the 16U2 using the Atmel Flip application (or a second Arduino). You can find instructions on the web; I've never had a need to do that exercise.
@bikerpj Would you post a legible photo of top and bottom of the Uno? Perhaps this might give clues (manuf, chips, drivers, buttons)
[edit] Is it possible that your COM ports have been disabled? Some security software (hardware?) do this to prevent USB attacks by unknown hardware (vendor I.D.).
[p.s. to the edit] If you install and start a "terminal emulator" like puTTY or RealTerm... it will complain that "port X is in use" if the comm port is not open/accessible by your session (or this image from my RealTerm seeing my Arduino)...
IF the emulator started (without Arduino inserted), that means the port is accessible, so stop the emulator and insert your Arduino.. then start the terminal emulator... and if the Arduino was talking to the Driver (CH340 or the like)... the emulator should now complain that the port is in use.
Any thoughts here? I can confirm purchase was direct from the Arduino UK store. And I’ve just confirmed (both) USB comms ports work with data from my mobile.
So … it does look like the board is faulty. Must have done something in the last project I was trying. Will get a new board - to manage a range of led lighting sequences on a large model railway. If permitted to round off this thread - I’ll get for another Uno Rev3 unless anyone thinks a different board might be better for what I intend to do? (I don’t need wi-fi or anything fancy.
Final - I will come back here if / when I get anything working!
I agree with getting the Nano R3. I made a stubby USB cable so the Nano+cable can be Velcro(r)ed to my laptop for travel.
If budget is an issue, knock-off NanoR3 can be purchases 3 for US$10 on Amazon. These would need the CH340 driver installed, and OLD BOOTLOADER selected in the IDE.
