Forgive me if I’m just an idiot and failed to find this on google and the forum search, but:
My mega has now stopped talking on serial. This isn’t just “it shows up and I can’t connect” it’s: It doesn’t show up under COM ports, other devices - nadda.
An identical arduino mega, and an uno show up and work just fine.
Now the kicker: The arduino itself seems to be functioning just fine - the code I previous had loaded is working perfectly - however because I can’t communicate with it using the onboard serial / usb interface - I can’t seem to program the board again. (This board is only a week old).
Any ideas?
Thanks
Worst case scenario: The FTDI chip on the ardiono is dead. Your arduino will still work but you will need to connect your arduino to a second ftdi chip if you wand to upload new sketches or if you wand to use the serial library to communicate to a computer.
You can use a second arduino to test this.
Try removing the microcontroller from your arduino uno (Be very careful or the pins might bent) and connect the rx to the rx pin and the tx to the tx pin of your broken arduino mega (make sure to connect the ground pins to each other and connect the 5v pin to the other 5v pin and connect the reset pin to the reset pin).
Now you can use the FTDI chip from your arduino uno as a replacement for your ftdi chip on your arduino mega. Try uploading a sketch. Now you can use the arduino mega. However if the board is just a week old i would consider returning it if it truely is the FTDI chip that is dead.