When I connect my leonardo to my pc, it didnt show up in Help/port. The led on the board with the word "L" and the one with the word "ON" went on. They remain fixed, not blinking. I cant upload any sketches to the board. Can anyone help me to fix it please? BTW please dont mind if you find this passage weird. English is my second language.
What happens when you double-tap the reset button? Does the L-LED fade in and out? If yes, the bootloader is OK; if no you will have to burmn the bootloader.
When the L-LED fades in and out, what happens in the operating system (e.g. Windows device manager)?
Make sure that you use a data cable (e.g. one that is used to copy files from a cell-phone to a PC). There are plenty charge-only cables around (they come e.g. with power banks) that don't carry the data signals.
Which operating system are you using.
Which version of the IDE are you using?
Thx for ur reply. After double-tapping the reset button, the L_LED started blinking and after a while (around 10 sec) it fades out. I've already check the windows device manager before I send this post. Nothing changes after plugging in and out. I'm using windows11 and the version of the IDE is 1.8.18. I'm quite sure my cable is a data cable. So in this case do i need to burn the bootloader?
I don't think that it will help but you can always try; you need a peogramner or other Arduino for it. Bootloader is working based on the fading in/out of the L-LED after the double tap. And bootloaders usually don't get corrupted.
Are you using a hub? Powered or non-powered? If so, connect the board directly to your PC and try again.
Can you provide a bit of history of the board and the project that you're working on; e.g.
- Did it work in the past? What were the changes between when it worked and now. Different sketch? Or new PC with new OS (win 10 vs win11)? Or ...
Or is this a new board and it has never worked. - What is all connected to the board? Disconnect everything (except USB) and try.
My bet is still on the cable. Do you have any other ones around that you can try?
It did work when i used it for the first time. I've been working on a project that automatically type something when it's connected to a device. but after a few updates of my sketch, I cant upload anything to it. Also can u help me with burning the bootloader? I searched it and im not sure can i use a arduino nano as a programmer. if yes, please provide me some sources to learn about that. Thank you.
There is no difference between a Nano and an Uno when it combes to being used as an Arduino-as-ISP. So you can follow instruction where an Uno is used as the programmer. At the Leonardo side however you will have to use the 6 pin header for the SPI signals (MISO, MOSI and SCK).
I unfortunately can't help you further with that.
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