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What happens if I upload a wrong program to my Arduino?
There are many pieces involved in getting a program onto your Arduino board, and if any of them aren’t right, the upload can fail.
What do I need to troubleshoot my Arduino?
They include: the drivers for the board, the board and serial port selections in the Arduino software, access to the serial port, the physical connection to the board, the firmware on the 8U2 (on the Uno and Mega 2560), the bootloader on the main microcontroller on the board, the microcontroller’s fuse settings, and more.
What to do when you upload code to Arduino Uno?
If nothing appears in your “Tools > Serial Port” menu, try plugging the board directly to your computer and restarting the Arduino IDE. Disconnect digital pins 0 and 1 while uploading as they are shared with serial communication with the computer (they can connected and used after the code has been uploaded).
Why does my Arduino keep crashing my Computer?
The Arduino software scans all the serial (COM) ports on your computer when it starts and when you open the Tools menu, and these networked ports can sometimes cause large delays or crashes. Make sure you don’t have firewall software that blocks access to the serial port (e.g. ZoneAlarm ).
What kind of device does Arduino use on Linux?
On Linux, the Uno and Mega 2560 show up as devices of the form /dev/ttyACM0. These are not supported by the standard version of the RXTX library that the Arduino software uses for serial communication. The Arduino software download for Linux includes a version of the RXTX library patched to also search for these /dev/ttyACM* devices.
Why is my Arduino not connecting to my Mac?
On Linux, you might try running the Arduino software as root, at least temporarily to see if fixes the upload. First make sure your board is on (the green LED is on) and connected to the computer. The Arduino Uno and Mega 2560 may have trouble connecting to a Mac through a USB hub.