Shop Filament Sensor Kit: https://store.dremc.com.au/products/filament-detection-device-sensor-kit-for-ender-3-v3-se?_pos=1&_psq=se+filam&_ss=e&_v=1.0
Firmware: Ender-3 V3 SE_HWCR4NS200320C13_SWV1.0.6_GD303
Note: Only support via printing from SD Card, if you're printing from USB due to firmware provided by creality it does not send M600 back. To avoid this, we suggest either using Klipper Pad or Neblua Pad in meantime.
Please refer to your install guide for install process, after install you need to update firmware to latest at least V1.0.6 or higher.
Note: 4 Pin connector goes on Mainboard Side and 3 Pin connector goes on filament sensor.
We also suggest this mode to mount the sensor on toolhead if you using V3 KE.
https://www.printables.com/model/838469-filament-sensor-relocation-hit-fm-for-ender3-v3-ke
Install Video: