# SV06 Filament Sensor not Recognized

**URL:** <https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903>\
**Category:** Sovol SV06 Fully Open Source 3D Printer\
**Created:** [April 21, 2026, 3:25pm UTC](https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903 "2026-04-21T15:25:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![judgeddreddful](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@judgeddreddful](https://forum.sovol3d.com/u/judgeddreddful)\
**Post date:** [April 21, 2026, 3:25pm UTC](https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903/1 "2026-04-21T15:25:55Z")

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I’m trying to add a filament runout sensor to my sv06, my issue is that it orgs not registering and that I also can’t find anywhere to enable/disable it in the control panel display. I have it connected directly to the mainboard and have 2 different sensors but neither works. I updated the firmware v2.0.0\_A and that didn’t even help.

To see link for shared images [Imgur: The magic of the Internet](https://imgur.com/a/7fryuj1)

 ![177678512846774430152655366188](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/8/85f6f188858074a9f2e73867ffb16d7e7c6fd751.jpeg)

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**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://forum.sovol3d.com/u/cardoc)\
**Post date:** [April 21, 2026, 7:14pm UTC](https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903/2 "2026-04-21T19:14:43Z")

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Hello and Welcome.

> [@judgeddreddful](#):
>
> I updated the firmware v2.0.0\_A

You downloaded directly from Sovol? Weather to monitor the runout sensor is decided BEFORE the firmware is compiled. I believe that all official builds have it enabled.

Test your switch and wire. Check for 5V on the red+ Black- wires at the switch. If missing check at the mainboard plug. If good then check volts from white+ to black-. Should be near 5V with the switch arm extended and near 0 when you press the arm in. Verify the same at the mainboard. The white wire is the input to the MCU. If everything checks out let us know and we’ll circle back to firmware VS bad board possibilities.

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/f/f59e72173edd31347b140b9384b9621f1883fd2a.jpeg)

Is there any possibility the plug is in backwards? The letters on the circuit board make me think I have the red and white wires reversed in test sequence I wrote.

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**Author:** ![Lion](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/lion/32/5586_2.png) [@Lion](https://forum.sovol3d.com/u/Lion)\
**Post date:** [April 21, 2026, 9:04pm UTC](https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903/3 "2026-04-21T21:04:38Z")

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The early SV06’s didn’t come with a filament sensor…I had to build a custom firmware for it.  
Later they added firmware for a filament sensor.

 ![Capture](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/9/932f0c6dfc5fa634cbc62e784cdc186f720d62d5.jpeg)

> **[Firmware Download](https://www.sovol3d.com/pages/download)**
>
> SOVOL SV01 SV02 SV03 SV04 SV05 SV01PRO SV06 SV06PLUS SV07 SV07PLUS COMGROW LASER Z1 Z1PRO T500 T300 FIRMWARE SLICER CURA SETTING.

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**Author:** ![judgeddreddful](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@judgeddreddful](https://forum.sovol3d.com/u/judgeddreddful)\
**Post date:** [April 21, 2026, 9:31pm UTC](https://forum.sovol3d.com/t/sv06-filament-sensor-not-recognized/9903/4 "2026-04-21T21:31:05Z")

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I actually found a forked version on the Facebook group that resolved my issue thanks.