TINKER PIEDESIGN IN INDIA

Line follower robot

Two line trackers keep the robot on a black tape line.

Sensor projectslinemotors

Open in TinkerPie Studio

What you need

Wiring

Left line tracker: DO → P10, right line tracker: DO → P11. Wheels: left → MOTOR 2, right → MOTOR 1.

Step by step

  1. Open Line follower robot in TinkerPie Studio. It opens as blocks.
  2. Wire it: Left line tracker: DO → P10, right line tracker: DO → P11. Wheels: left → MOTOR 2, right → MOTOR 1.
  3. Press Run to try it in the simulator. Use the sliders and buttons under the board picture to test it.
  4. Connect TinkerPie with a USB-C cable in Chrome or Edge, press Connect, then Download. Or, with Studio started from the TinkerPie launcher on your computer, open the Arduino C++ tab and press Build & Flash.
  5. Change something: a colour, a number, a sound. Then run it again.

The code

This is the program the blocks make. The same program runs in the simulator and on the board.

JavaScript
var left, right;

basic.forever(function () {
  left = sensors.lineTracker(Pin.P10);
  right = sensors.lineTracker(Pin.P11);
  if (left && right) {
    motors.tank(50, 50);
  } else if (left) {
    motors.tank(10, 50);
  } else if (right) {
    motors.tank(50, 10);
  } else {
    motors.tank(25, 25);
  }
  basic.pause(20);
});
Arduino C++ (TinkerPie library)
// Line follower robot
// Arduino C++ made by TinkerPie Studio from the blocks. Board: TinkerPie V1 (ESP32-S3).
// Arduino IDE: install the TinkerPie library (Studio menu > Arduino library), then Tools > Board > ESP32S3 Dev Module,
// USB CDC On Boot: Enabled, Flash Size: 16MB, Partition Scheme: 16M Flash (3MB APP/9.9MB FATFS), PSRAM: OPI PSRAM.
#include <TinkerPie.h>
using namespace tinkerpie;

bool left = false;
bool right = false;

void setup() {
  tinkerpie::begin();
  basic::forever([]() {
    left = sensors::lineTracker(Pin::P10);
    right = sensors::lineTracker(Pin::P11);
    if (left && right) {
      motors::tank(50, 50);
    } else if (left) {
      motors::tank(10, 50);
    } else if (right) {
      motors::tank(50, 10);
    } else {
      motors::tank(25, 25);
    }
    basic::pause(20);
  });
}

void loop() {
  tinkerpie::loop();   // runs the forever blocks and handles events
}

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