avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x00 When I plug this in, I do see a power light. There are no cables whatsoever connected other than the USB. I have another Arduino UNO which works fine when I upload the sketch (I'm using the basic blink sketch). How do I resolve this? What kind of problem can it be?

Mar 6, 2018 · My sketch "I2C_scanner.ino" works fine on a Arduino Mega 2560. The computer recognizes port Com 4 (text: "Com 4 (Arduino/Genuino Mega or Mega 2560). When I restart the IDE with the same sketch when it is connected to a Arduino Nano, I only see in a box "Serial ports, Cim1, Com3 and Com 5", but no confirmation that the Nano is recognized. Uploading …

Feb 7, 2017 · Hello everyone, I've been using the Arduino Uno R3 SMD Edition for about two months but, just now, I've encountered this issue: avrdude: verification error, first mismatch at byte 0x0000 0x62 != 0x0c avrdude: verification error; content mismatch The message appears every time I try to upload any kind of program to the Arduino so I think it's a board problem. If you …

Sep 19, 2016 · I am new to Arduino. I can't connect to my Arduino Uno. "Port" is grayed out under the tools tab in the IDE, COM and LTP ports do not show up in the device manager, and the Arduino does not show up anywhere else in the device manager. I have tried a number solutions advised on the Arduino troubleshooting section, but none have worked.

Jan 22, 2015 · When I connect my first Arduino Uno board with the USB cable to the PC, the green light on the board lights up, and the orange light goes into the blinking mode - indicating that the board is working. But NOTHING happens on the computer (tried it on the PC and a laptop - both running Windows 8.1). I mean, simple question: When I hook it up, the computer should …

Nov 10, 2023 · Hijacking is against the Arduino forum rules. The reason is that it may sidetrack the discussion, even preventing the creator of the topic from getting the assistance they need. It also reduces your own chances of getting assistance. This is basic forum etiquette, as explained in the " How to get the best out of this forum " guide.

Jul 20, 2025 · Making embedded systems accessible to allTutoriels et cours Cours et tutoriels autour de l’Arduino Le bar -- Espace détente -- Réalisations et Projets Finis Ce sous forum est destiné à la présentation de projets/réalisations complets et fonctionnels.

Mar 28, 2019 · Installing Libraries | Arduino Documentation Learn how to install additional libraries in the Arduino IDE 1.

Nov 20, 2016 · Simple problem, need to convert String to const char*. Here is what I have done already:

Jul 16, 2013 · Is there a predefined constant for pi in arduino? Or do you have to define it yourself?