# Need stable firmware for Ender 3 - v4.2.7 Board - BLTouch

**URL:** https://marlin.crc.id.au/forum/t/need-stable-firmware-for-ender-3-v4-2-7-board-bltouch/2300
**Category:** Support
**Created:** [17 October 2024 01:15 UTC](https://marlin.crc.id.au/forum/t/need-stable-firmware-for-ender-3-v4-2-7-board-bltouch/2300 "2024-10-17T01:15:03Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Aaron\_Egger](https://marlin.crc.id.au/forum/user_avatar/marlin.crc.id.au/aaron_egger/32/1206_2.png) [@Aaron\_Egger](https://marlin.crc.id.au/forum/u/Aaron_Egger)
#### Post date: [17 October 2024 01:15 UTC](https://marlin.crc.id.au/forum/t/need-stable-firmware-for-ender-3-v4-2-7-board-bltouch/2300/1 "2024-10-17T01:15:03Z")

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Hi there,

i am currently using the firmware from “Ender 3 - v4.2.7 Board - BLTouch”.  
This was the only source for a prebuilt firmware that supports Bltouch and the smart filament runout sensor.  
The firmware worked fine. But now the sd card slot got broken and i tried to switch to octoprint.  
It first seemed to work fine, but after some layers of printing the printer does weird stuff.  
It stops moving, then moves in a random direction, even one time tried to move out of bounds with the steppers motors going crazy.  
I think there is an issue in the daily build i currently use (Ender3-v4.2.7-BLTouch-20240526).  
I may have a slight chance to get the sd card slot working at least shortly for an firmware update. But i would prefer a stable build over a nightly version to ensure that its not firmware related.  
Octoprint seems not be the source of the issue. I compared the gcodes it sent with those that should have been sent and they are exactly the same.

Can someone help me out? 🙂

Cheers  
Aaron