Help using the TOF10120 sensors to trigger my model railroad crossing

So I think I know how to wire this up, just not sure where to put the TOF10120 pins in this sketch. I want to use these sensors to trigger the sketch

Here is what I got off of Google code generator thing...

Any help would be greatly appreciated. Thank you in advance.

Certainly! Below is an Arduino code that uses two TOF10120 sensors to control a model railroad crossing gate with an SG90 servo motor and two flashing LEDs. The LEDs will flash when the first sensor is triggered, and the gate will lower after 3 seconds. The LEDs will continue to flash until the second sensor is triggered, after which the gate will rise after a 30-second delay, and the LEDs will stop flashing.

#include <Wire.h>
#include <Servo.h>

#define TOF1_ADDR 0x52 // Address of the first TOF10120 sensor
#define TOF2_ADDR 0x53 // Address of the second TOF10120 sensor
#define LED1_PIN 8
#define LED2_PIN 9
#define SERVO_PIN 10

Servo gateServo;
bool gateLowered = false;

void setup() {
  Wire.begin();
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  gateServo.attach(SERVO_PIN);
  gateServo.write(90); // Initial position (gate up)
}

void loop() {
  if (isSensorTriggered(TOF1_ADDR)) {
    flashLEDs(3000); // Flash LEDs for 3 seconds
    gateServo.write(0); // Lower the gate
    gateLowered = true;
    while (!isSensorTriggered(TOF2_ADDR)) {
      flashLEDs(500); // Continue flashing LEDs
    }
    delay(30000); // Wait 30 seconds
    gateServo.write(90); // Raise the gate
    gateLowered = false;
    digitalWrite(LED1_PIN, LOW);
    digitalWrite(LED2_PIN, LOW);
  }
}

bool isSensorTriggered(uint8_t sensorAddr) {
  Wire.beginTransmission(sensorAddr);
  Wire.write(0x00); // Command to read distance
  Wire.endTransmission();
  Wire.requestFrom(sensorAddr, 2);
  if (Wire.available() == 2) {
    int distance = Wire.read() << 8 | Wire.read();
    return distance < 100; // Adjust threshold as needed
  }
  return false;
}

void flashLEDs(int duration) {
  unsigned long startTime = millis();
  while (millis() - startTime < duration) {
    digitalWrite(LED1_PIN, HIGH);
    digitalWrite(LED2_PIN, HIGH);
    delay(250);
    digitalWrite(LED1_PIN, LOW);
    digitalWrite(LED2_PIN, LOW);
    delay(250);
  }
}

Explanation:

Setup:

Initialize the I2C communication for the TOF10120 sensors.
Set the LED pins as outputs.
Attach the servo motor to the specified pin and set its initial position (gate up).

Loop:

Continuously check if the first sensor is triggered.
If triggered, flash the LEDs for 3 seconds and then lower the gate.
Continue flashing the LEDs until the second sensor is triggered.
Once the second sensor is triggered, wait for 30 seconds, then raise the gate and stop flashing the LEDs.

Helper Functions:

isSensorTriggered: Reads the distance from the specified TOF10120 sensor and checks if it is below a certain threshold.
flashLEDs: Flashes the LEDs for a specified duration.

Feel free to adjust the sensor addresses, pin numbers, and distance thresholds as needed for your specific setup.

4 posts - 4 participants

Read full topic