Researched by Riley Hart · based on ELEGOO Smart Robot Car V4 build guide and docs · we may earn a commission
The line sensor needs contrast and the right threshold. Start with this: Use black tape on a light floor.
The line sensor needs contrast and the right threshold.
In the app, try Obstacle Avoidance: put it on the floor and watch it turn away from walls. Then try Line Tracking on a black tape line.
Tip: If it misses the line, use keys 4, 5 and 6 on the remote to tune the sensor.
Check: It turns away from walls on its own.
Common mistake: Testing line tracking on a dark floor. Use black tape on a light floor.
Open step 29 in the free build tool, tap Stuck and take a photo. The coach checks it against that exact step and tells you what to change. 3 free questions per kit.
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