Ultrasonic sensor HC-sr04 doesn't work, conflict?

Projects General Guidance
1

Hi, i'm using a D1 mini board with a 1.8 inch TFT SPI LCD and a ultrasonic sensor HC-sr04
My project is about a weather station so i also have "WundergroundClient and TimeClient librarys

Here is my code(simplified):

#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
#include <Adafruit_ST7735.h>
#include <Adafruit_GFX.h>
#include <SPI.h>
#include "WundergroundClient.h"
#include "TimeClient.h"

#include <Ultrasonic.h>

#define TRIGGER_PIN D6
#define ECHO_PIN D2


#define cs   D8
#define dc   D3
#define rst  D4

// Color definitions
#define BLACK    0x0000

//const char* ssid     = "G3orG3";      // SSID of local network
//const char* password = "xxxx";   // Password on network

// TimeClient settings
const float UTC_OFFSET = 3;

// Wunderground Settings
const boolean IS_METRIC = true;
const String WUNDERGRROUND_API_KEY = "xxx";
const String WUNDERGRROUND_LANGUAGE = "RO";
const String WUNDERGROUND_COUNTRY = "RO";
const String WUNDERGROUND_CITY = "xxxx";

TimeClient timeClient(UTC_OFFSET);

// Set to false, if you prefere imperial/inches, Fahrenheit
WundergroundClient wunderground(IS_METRIC);

Ultrasonic ultrasonic(TRIGGER_PIN, ECHO_PIN); // (Trig PIN,Echo PIN)

Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, rst); //initialize LCD



void setup() {

  Serial.begin(115200);
  tft.initR(INITR_BLACKTAB);   // initialize a ST7735S chip, black tab
  tft.setRotation(3);
  tft.fillScreen(BLACK);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
  Serial.println("Connected");

}

void loop() {
  Serial.println(ultrasonic.Ranging(CM));
  delay(1000);
}

In the serial output i got the connected msg from the setup and then only the number 51 as the result ultrasonic sensor

I also tried using NewPing library
I also tried to measure the distance using this:

digitalWrite(TRIGGER_PIN, LOW);
    delayMicroseconds(2);

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

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

    // Calculating the distance
    int dist = (duration * 0.034) / 2;
    Serial.println(dist);

but still no luck !

2

Sure your wiring is correct, and you have set the correct pins for trig and echo in your sketch?

3

wvmarle:
Sure your wiring is correct, and you have set the correct pins for trig and echo in your sketch?

Yes i even used other pins
But when i upload only the code for ultrasonic it works

4

Ah, that's important to know. So the sensor is in working order.

How do you power the LCD screen? If through the WeMOS that's probably your problem: unstable/insufficient power for the HC-SR04.

5

wvmarle:
Ah, that's important to know. So the sensor is in working order.

How do you power the LCD screen? If through the WeMOS that's probably your problem: unstable/insufficient power for the HC-SR04.

I have a step down convertor to power them
Another thing to know is that everything is working(including lcd and weather updates) even the sensor doesn't