# Nano Every not uploading

**URL:** <https://forum.arduino.cc/t/nano-every-not-uploading/1410061>\
**Category:** Uploading\
**Created:** [October 20, 2025, 8:22pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061 "2025-10-20T20:22:56Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![allanh2](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/allanh2/32/1099219_2.png) [@allanh2](https://forum.arduino.cc/u/allanh2)\
**Post date:** [October 20, 2025, 8:22pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/1 "2025-10-20T20:22:57Z")

</div>

Hello,

I am trying to upload code to my Arduino Nano Every. Everything seemed to be working fine and the code was uploading, but now that I have added a battery pack the code won't upload. I don't know if the battery pack is related as I hadn't used the Every for a few days when I added the battery pack and attempted to upload again.

The batteries are not in the battery pack when I am connecting via USB to upload code, I am aware that powering via both at the same time can cause issues. The Arduino seems to still be running the previous code I had uploaded (taking measurements and reading to an SD card) but won't upload the new code.

At the moment it is getting stuck on "uploading" forever and never finishes, although I have been getting the following error:

```arduino
avrdude: jtagmkII_reset(): timeout/error communicating with programmer (status -1)

```

I have the board set to the correct megaAVR Nano Every board and the port set to the correct port (COM13, disappears when I unplug the device). I'm not sure what the issue is as the Nano Every was working fine before but has stopped uploading now.

Cheers

---

<div class="post-metadata">

**Author:** ![allanh2](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/allanh2/32/1099219_2.png) [@allanh2](https://forum.arduino.cc/u/allanh2)\
**Post date:** [October 20, 2025, 8:36pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/2 "2025-10-20T20:36:27Z")

</div>

I managed to get a full error code an attempt that failed rather than uploading forever:

```arduino
avrdude: Version 6.3-20190619
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "C:\Users\OEM\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"

         Using Port : COM13
         Using Programmer : jtag2updi
         Overriding Baud Rate : 115200
JTAG ICE mkII sign-on message:
Communications protocol version: 1
M_MCU:
  boot-loader FW version: 1
  firmware version: 1.07
  hardware version: 1
S_MCU:
  boot-loader FW version: 1
  firmware version: 6.07
  hardware version: 1
Serial number: 00:00:00:00:00:00
Device ID: JTAGICE mkII
         AVR Part : ATmega4809
         Chip Erase delay : 0 us
         PAGEL : P00
         BS2 : P00
         RESET disposition : dedicated
         RETRY pulse : SCK
         serial program mode : yes
         parallel program mode : yes
         Timeout : 0
         StabDelay : 0
         CmdexeDelay : 0
         SyncLoops : 0
         ByteDelay : 0
         PollIndex : 0
         PollValue : 0x00
         Memory Detail :

                                  Block Poll Page Polled
           Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
           prodsig 0 0 0 0 no 61 61 0 0 0 0x00 0x00
           fuses 0 0 0 0 no 9 0 0 0 0 0x00 0x00
           fuse0 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse1 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse2 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse4 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse5 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse6 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse7 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           fuse8 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           lock 0 0 0 0 no 1 0 0 0 0 0x00 0x00
           data 0 0 0 0 no 0 0 0 0 0 0x00 0x00
           usersig 0 0 0 0 no 64 64 0 0 0 0x00 0x00
           flash 0 0 0 0 no 49152 128 0 0 0 0x00 0x00
           eeprom 0 0 0 0 no 256 64 0 0 0 0x00 0x00

         Programmer Type : JTAGMKII_PDI
         Description : JTAGv2 to UPDI bridge
         M_MCU hardware version: 1
         M_MCU firmware version: 1.07
         S_MCU hardware version: 1
         S_MCU firmware version: 6.07
         Serial number: 00:00:00:00:00:00
         Vtarget : 5.0 V

avrdude: jtagmkII_initialize(): Cannot locate "flash" and "boot" memories in description
avrdude: jtagmkII_reset(): timeout/error communicating with programmer (status -1)
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.

avrdude: jtagmkII_close(): timeout/error communicating with programmer (status -1)
avrdude: jtagmkII_close(): timeout/error communicating with programmer (status -1)

avrdude done. Thank you.

Failed uploading: uploading error: exit status 1

```

---

<div class="post-metadata">

**Author:** ![gilshultz](https://avatars.discourse-cdn.com/v4/letter/g/67e7ee/32.png) [@gilshultz](https://forum.arduino.cc/u/gilshultz)\
**Post date:** [October 21, 2025, 9:23pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/3 "2025-10-21T21:23:59Z")

</div>

I do not have that board but it appears you may have a bad cable or something connected to a pin causing conflict with the loader. Post an annotated schematic showing exactly how it is wired and power sources as well. Does it keep sending data to the terminal when in terminal mode?

---

<div class="post-metadata">

**Author:** ![allanh2](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/allanh2/32/1099219_2.png) [@allanh2](https://forum.arduino.cc/u/allanh2)\
**Post date:** [October 22, 2025, 12:49am UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/4 "2025-10-22T00:49:40Z")

</div>

I have built a second prototype with a different Nano Every and it is all working now. I think I may have burnt the processor on the first Every when I was figuring out the batteries.

---

<div class="post-metadata">

**Author:** ![gilshultz](https://avatars.discourse-cdn.com/v4/letter/g/67e7ee/32.png) [@gilshultz](https://forum.arduino.cc/u/gilshultz)\
**Post date:** [October 22, 2025, 2:37am UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/5 "2025-10-22T02:37:44Z")

</div>

Good Job, it appears you found the problem.

---

<div class="post-metadata">

**Author:** ![stitech](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/stitech/32/1016377_2.png) [@stitech](https://forum.arduino.cc/u/stitech)\
**Post date:** [October 22, 2025, 8:17pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/6 "2025-10-22T20:17:11Z")

</div>

> [@allanh2](#):
>
> I may have burnt the processor on the first Every when I was figuring out the batteries.

Here's how:

 ![DangerForNanoEvery](https://europe1.discourse-cdn.com/arduino/original/4X/3/c/7/3c7f3e3efdf2bde615c64bf220165a2e07e426ec.png)

This damages the 5V-regulator.  
Protection is possible:

 ![ProtectionForNanoEvery](https://europe1.discourse-cdn.com/arduino/original/4X/b/2/6/b265d1420ead1db31dd47aaba66d7ad5b7093716.png)

---

<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [April 20, 2026, 8:17pm UTC](https://forum.arduino.cc/t/nano-every-not-uploading/1410061/7 "2026-04-20T20:17:25Z")

</div>

Closed on April 20, 2026, 8:17pm UTC

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.