NodeMCU / HC-SR04 / TM1637

Vyžaduje externí napájení 5V – jinak čidlo nejelo a displej slabě svítí.

co 1 vteřina vyčítá vzdálenost a zobrazuje na displeji.

#include "SevenSegmentTM1637.h"

// defines pins numbers
const int trigPin = 2;  //D4
const int echoPin = 0;  //D3

const byte PIN_CLK = D5;   // define CLK pin (any digital pin)
const byte PIN_DIO = D6;   // define DIO pin (any digital pin)
SevenSegmentTM1637    display(PIN_CLK, PIN_DIO);

// defines variables
long duration;
int distance;

void setup() {
pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
Serial.begin(9600); // Starts the serial communication
Serial.print("Meric-vzdalenosti-HC-SR04 ");
display.begin();            // initializes the display
display.setBacklight(100);  // set the brightness to 100 %
display.print("INIT");      // display INIT on the display
delay(200);                // wait 1000 ms
}

void loop() {
// Clears the trigPin
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

// Sets the trigPin on HIGH state for 10 micro seconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);

// Calculating the distance
distance= duration*0.034/2;
// Prints the distance on the Serial Monitor
Serial.print("Distance: ");
Serial.println(distance);

  display.clear();                      // clear the display
  display.print(distance);                // print SUCC for success
  
delay(1000);
}