Foreword: I opened a new forum topic although this problem has been brought up in the forum several times already. However, those threads are already closed (mainly due to age, not due to being solved), so I could not attach my solution there. Problem After a while it was all of a sudden NOT possi…

Something similar happened to me. The uploaded sketch was interfering with further upload so I played with reset button until it worked.

Perhaps the comm port is hosed up. You might see this thread until a real Arduino head answers. [image] Lost comm port --- Programming Questions The comm port for my board is no longer seen by the IDE or the device manager. Using IDE 2.0 beta 12, board is Nano iot 33, OS…

Thanks so much for taking the time to share this information @Torschtele ! Regarding the comments, The situation is different depending on whether the board you are using has native USB capabilities (e.g., Leonardo, Micro, MKR, Nano 33 IoT), or a dedicated USB interface chip (e.g., Nano Every, Uno,…

Regarding the comment about comments. Using Serial.print on Nano Every can absolutely interfere with further upload. Thanks for reading.

Can you provide instructions I can follow to reproduce the issue?

Just in case someone is curious, the above question was not directed at me specifically. Thanks for reading.

It is complicated. The reset on Every is done by 1200 baud touch as for boards with native USB and the newer fw for SAMD11 added reset on new USB connection too. I have the new one uploaded in 2019 with the same procedure OP described. I know that I have to first open the Serial Monitor after power…

[image] killzone_kid: the above question was not directed at me specifically It was directed at you specifically. I should have quoted to make that clear. [image] Juraj: I know that I have to first open the Serial Monitor after power up and only then upload (in Sloeber (maybe it matters)…

[image] Torschtele: Step 3: Open Windows command line, navigate to the folder to where you unzipped the firmware and bossac files and enter command: (Replace $portname by COM10 or whatever COM port is assigned by Windows after plugging your bricked Arduino Nano Every to your Windows computer's U…

Hi! Just leftclick w/ your mouse on the Windows Icon (the four rounded squares in one end oh your Windows toolbar) and start typing "cmd". Or enter "cmd" in the Cortana search field. Then Windows will show you results matching the "cmd" search pattern. From those doble click on the one that looks l…

Hello! I knew how to open command prompt, but I didn’t get what you did with the firmware and how to type in the command. I copy + pasted the command into command prompt, pressed enter, and nothing happened.

Arduino Nano Every: upload of sketch suddenly not possible anymore

Development Tools IDE 1.x

captainaubrey January 9, 2022, 3:09pm 2

Perhaps the comm port is hosed up. You might see this thread until a real Arduino head answers.

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Arduino Nano Every: upload of sketch suddenly not possible anymore

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