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Uploading is the process of updating or changing the sketch on the Arduino board. It does not refer to uploading to a server or a website.

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I am unable to upload any code to my Atmega328PB-MU microcontroller. However I could upload the bootloader just fine. Here is my custom board to upload the bootloader. As you can see I use a adapter ...
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I'm attempting to figure out how to mass-upload a single Arduino INO sketch file to several different microcontrollers on a Windows 10 system. It was understanding that, every time that the Arduino ...
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Hello I just tried to upload a simple sketch to my arduino Uno and the sketch is uploading forever and when I try to change the USB port where my arduino is connected no matter the port I putt the ...
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Recently bought a nano esp32 to play around with the small size and wifi module. However I'm plagued by the No DFU capable USB device available message. My efforts and deductions: I can connect to ...
Nebulous's user avatar
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I'm encountering an issue while attempting to upload an Arduino sketch on my Ubuntu 20.04 system. Despite ensuring that the correct board is selected and the USB port is recognized properly, I ...
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Warn : Transport "sdi" was already selected Ready for Remote Connections Error: open failed *** [upload] Error 1 I have bought a development board (CH32V003F4P6) and I cannot upload a ...
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I'm using Arduino IDE 2.1.1 on a Mac M2 and it's failing to upload, No drive to deploy, I have tried 3 different Mac's, and multiple Picos & USB cables. Summary of what I've done: Loaded Example ...
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I have a few cheap Nano clones that I bought online that have worked for the past couple of months. They were working fine today until suddenly the Arduino IDE had trouble uploading sketches to them. ...
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Do you have to upload the UNO after the applied power is disconnected? Does the UNO retain the code without any power? And when the power is disconnected, if the code is retained, will the timers ...
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I am having trouble uploading code to my Arduino Nano. It has been very trusty in the past, but I am getting this new error when uploading any code to it: avrdude: ser_open(): can't set com-state for &...
syntaxerror's user avatar
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I'm trying to upload a simple sketch to the new Wemos Lolin S3 Pro but unfortunately I can't seem to get it to work. I get the following error message: Connecting......................................
shyney's user avatar
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This question has been asked before and I have carefully read the other questions, but the solutions have not worked in my case, and the details are not the same as mine. Description The Arduino Uno ...
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Are there any options for programming an STM32 black-pill from the Arduino IDE without first having to manually push buttons to go into DFU mode or having to buy an ST-Link device? A solution that ...
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I have timed the double reset as best as possible multiple times but the upload doesn't happen before the board leaves bootloader mode. this is all I'm given as an error which doesn't appear until ...
spendlove57's user avatar
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I'm following the standard process to put an STM32 "black pill" (STM32F401CC) into DFU mode so that I can upload from the Arduino IDE over USB: Hold down boot0. Press and release rst. ...
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When I program atmega328 PU on breadboard,vwhat programmer do I have to use and what arduino board type I have to choose? I am trying this with ftdi converter I have already done the connections and ...
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I have an handful of fake arduino nanos. The work fine, but as an experiment, I tried to program them with a usb serial adapter (a real FTDI one). It doesn't work, but also, strangely, it seems to ...
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I wrote a basic blink code and tried to run it on the auduino IDE. Compilation was sucessfull but the code stucks at uploaing. I turned on the verbose output while uploading and this is what I have ...
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I have an Arduino Pro Micro ATmega32U4 and I'm facing this error message on uploading: Copyright (c) Brian Dean, http://www.bdmicro.com/ Copyright (c) Joerg Wunsch System ...
arksdf's user avatar
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Dealing with this very common issue on IDE v2.0.0., but not sure why. I should be fine group-wise: adm tty dialout cdrom sudo dip plugdev lpadmin lxd sambashare docker I've also seen numerous ...
x1a4's user avatar
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I'm using an Arduino nano, after an unfortunate event, The mega chip heat up and when I tried touching it, it burned my finger. After that, I connected to my laptop's USB port and the computer ...
Hibiki Supersanta's user avatar
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I've old Nanos that to program (upload) with Arduino IDE I have to select "ATMEGA328P Old Bootloader". The programming is via the standard Nano USB cable, and I need the CH340 driver under ...
pathfinder's user avatar
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I have been getting the error avrdude: verification error, first mismatch at byte 0x036c 0xb8 != 0xf8 avrdude: verification error; content mismatch avrdude done. Thank you. When trying to upload the ...
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I'm currently working on a project where you essentially will have multiple Arduinos (1 Uno, multiple Nanos) daisy-chained, only connected through 2 digital pins and one wire for Serial communication (...
Mikoyan's user avatar
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When i try to upload code to the esp32 the following error shows up in the command line: A fatal error occurred: Packet content transfer stopped (received 8 bytes). I use platformio in VScode the ...
exo's user avatar
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I have a Arduino Nano 33 BLE that I've been using for a while. I usually upload new programs to the board through USB with the board in a bootloader loop. The other day this stopped working. The board ...
Tyler Hartwig's user avatar
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I have the same application for both ESP32 and ESP8266 (the same functionality). The person, who is not an IT expert is expected to launch the dedicated installer program to upload the (first/new) ...
pepr's user avatar
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As a complete newbie, after much looking for the best bargain, I ended up buying one of these UNO R3 clones, without realizing it had the chip soldered on the board. It looks like this: It works OK ...
Pere's user avatar
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I am trying to use a RP2040 Pico with the Arduino IDE. This is a huge uphill battle. Initially I couldn't get the upload serial port to show up, then copied the "hello world" UF2 to the Pico ...
Heliophagus's user avatar
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Hello I have a question on why my port is grayed out when I go to upload? I’ve watched so many YouTube videos on what’s the problem and have been trying to do everything but just nothing seems to work!...
Tommy Serluca's user avatar
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I am getting the Arduino console error "the selected serial port serial.serialutil.SerialTimeoutException: Write timeout does not exist or your board is not connected". I recently upgraded ...
mac11's user avatar
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1 answer
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my arduino for the playground adafruit express gets stuck uploading, and is saying that it is not recognizing the ports. <Arduino: 1.8.16 (Windows Store 1.8.51.0) (Windows 10), Board: "...
Ryan Russel's user avatar
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I am using arduino-ide2.0.0-beta.7(CLI Version:0.18.3 alpha) on Manjaro Linux and I get this error when uploading sketch to my Arduino Micro: avrdude: ser_open(): can't open device "/dev/ttyACM0&...
programandoconro's user avatar
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I'd successfully got my Nano 33 BLE Sense to read accelerometer data and subject to there being a difference between current and last readings, to send this via the EasyTransfer library to an XBee ...
RobM's user avatar
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I've got a new Keyestudio ATmega2560 (compatible with Arduino Mega 2560) board and was trying to upload a simple sketch. I noticed that both the Arduino IDE and PlatformIO were unable to do so, they ...
Yanick Salzmann's user avatar
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This is my log, honestly no idea what the problem is here, tried updating java, didnt work. Sketch uses 11216 bytes (4%) of program storage space. Maximum is 262144 bytes. Global variables use 2384 ...
Rory Miley's user avatar
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Arduino: 1.8.13 (Linux), Board: "Arduino Uno" Sketch uses 444 bytes (1%) of program storage space. Maximum is 32256 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 ...
G. S.'s user avatar
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I have bought a new Mega 2560 with WiFi. I tried to upload a sketch that worked OK with the previous Mega 2560 but the upload always fails with the following error message: ****************************...
Ranjith's user avatar
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Im now working on a Node MCU based project but the problem is that i cannot upload the code to the board. Further more whenever i connect the usb to the NodeMCU my keyboard stops working and only ...
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Consider if the lifespan of atmega328 has been wear out. It said on datasheet of atmega how many times we can upload sketch about 10.000times (cmiiw), should i change the arduino or only the ...
Muhammad Ikhwan Perwira's user avatar
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I have an Arduino Due board. I can successfully upload code to it using Arduino upload via USB. However I am also exploring another approach, which is to upload code via Atmel studio using an Atmel ...
daniel's user avatar
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SOLVED! See bottom. I know this question has been asked a lot (believe me, I've been Googling for solutions for 3 days, and have come across many posts on SE), but none of the posts I've found have ...
Carl S's user avatar
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"Sketch uses 23032 bytes (71%) of program storage space. Maximum is 32256 bytes. Global variables use 1342 bytes (65%) of dynamic memory, leaving 706 bytes for local variables. Maximum is 2048 ...
cody blanchard's user avatar
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I actually made a prototype with multiplexing Chip select pin on Arduino, which connects to RESET pin of target board to program. When I am connecting one target board at once I am able to program it ...
Robot's user avatar
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Background In 2019, Microchip acquired Atmel and released several new AVR microcontrollers, including the Tiny-0 and Tiny-1 Series. On these mircocontrollers, traditional Atmel ICSP programming was ...
比尔盖子's user avatar
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Update 12/11 Working through the answer posted. Upload reset appearance - [Works blinks correctly.] Convince yourself that reset appearance code reliable indicates DTR resets. [Opened the serial ...
Rick Dearman's user avatar
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1 answer
985 views

I've been trying to get my nodemcu working for months and tried countless online references but none worked. I'm using the Arduino IDE to upload sketches and always get the error "Timed out ...
Ted Mosby's user avatar
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When I upload a sketch from Arduino IDE to my Arduino Nano (not yet connected to breakout board) via USB, it works. I can then plug the Nano back to the breakout board and let it do its thing. However,...
Mushroom1's user avatar
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I hope it's not a sci-fi for arduino. But I saw that dual system with two MCU can program each other via radio connection. It has been done in experimental space cube projects. It is theoretically ...
Sahasrar's user avatar
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I'm trying to upload an simple blink sketch to my Arduino Nano, which not used for a while. As I remember, I uploaded an sketch to control RF module, at the last time I used. Now, when I connect my ...
Ruwan Kumara Liyanage's user avatar
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