8-sensor line follow module (8-channel)

Identifiers (from photo)

• Silkscreen text: "8 sensor lines follow" (Chinese: 8路寻线模块)
• Pin labels: VCC, D0..D7, GND

What it is

• 8-channel IR reflectance / line-following sensor array.

Interface

• Digital GPIO inputs: D0..D7

Power

• VCC likely 3.3V–5V depending on board design — confirm before connecting.

Planned RAK3112 firmware block

• Gate: GateS_line_follow_8ch
• Features:
  • read 8 channels
  • log bitmask + per-channel states
  • optional calibration routine

Next info needed

• VCC range (photo of the back if it lists voltage) or product link.