Help for a newbie 77

[beiracing77]

I have searched for similar topics and can’t find the answer I need.
I have built a distance sensor using wemos D1 mini

I had a guy write the code for Blynk and when I try to upload thru Arduino I get
Blynk.begin line highlighted with the error message- pass not declared in this scope-

Below is the code, I don’t write code and I would appreciate any help I could get.

#define BLYNK_PRINT Serial
#define CALIBRATION 0.968656756
//pins for the distance sensor  HSSR04
#define trigPin D5
#define echoPin D6

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

BlynkTimer timer;
//////////////////////////////////////////////////////auth code sent to your mail 
char auth[] = "6aa3eed2506d4a158f3aae3dxxxxxx";
///////////////////////////////////////////////////
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid [] = "NETWORK77";
char password [] = "82FCB97xxx";
                    
//////////////////////////////////////////////////////////

void setup()
{
  // Debug console
  Serial.begin(115200);
Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, myTimerEvent);
}

void loop()
{
  Blynk.run();
  timer.run(); // running timer every second
}



////_____________________________
void myTimerEvent()
{
Blynk.virtualWrite(V1,distanceReading() );
}


long distanceReading(){
  float duration, distance; //our beloved variables
 digitalWrite(trigPin, LOW);  //PULSE ___|---|___ 
 delayMicroseconds(2);  
 digitalWrite(trigPin, HIGH); 
 delayMicroseconds(10);  
 digitalWrite(trigPin, LOW); 
 duration = pulseIn(echoPin, HIGH);
 distance = ((duration*0.0168422+0.221)*0.393701)*CALIBRATION;//returns inches 1cm =*0.393701 inches
 //Serial.print("distance(inch): ");Serial.println(distance);
 return distance;
}

[Gunner]

I don’t write code and I would appreciate any help I could get.

You could ask the guy that DID write the code

char password [] = “82FCB97xxx”;

Blynk.begin(auth, ssid, pass);

But you are using the variable password in the declare but referencing just pass in the command.

That and now we all know your WiFi and Auth codes

The WiFi is no big deal unless you are my neighbor… but others can mess around with your hardware until you change you AUTH code. (refresh in the App and replace in the sketch).

I have also never tried to run a Blynk.virtualWrite() that way… directly calling a function. I know functions can return final results of a process, but I though it is coded differently? Something for me to Google

Anyhow, not how I would have done such a simple process… more like this…

timer.setInterval(1000L, distanceReading()); // Call the scanning function directly

long distanceReading(){ 
float duration, distance; //our beloved variables 
digitalWrite(trigPin, LOW); //PULSE ___|---|___ 
delayMicroseconds(2); 
digitalWrite(trigPin, HIGH); 
delayMicroseconds(10); 
digitalWrite(trigPin, LOW); 
duration = pulseIn(echoPin, HIGH); 
distance = ((duration*0.0168422+0.221)*0.393701)*CALIBRATION;//returns inches 1cm =*0.393701 inches //Serial.print("distance(inch): ");Serial.println(distance); 
//return distance; 
Blynk.virtualWrite(V1,distance);  // Send the result directly to the App
}

[beiracing77]

Thank you Gunner for your reply. Like I said, new and learning and I can’t make contact with the guy to ask. So can I copy and paste what you wrote?
Also, how do I fix the variable password in the declare issue?

[Gunner]

Like I said, new and learning and I can’t make contact with the guy to ask

Understandable, but there are sites that teach in-depth programming… but not here We mainly try to help people learn about using Blynk, although we may we toss out a coding snippet or so

So can I copy and paste what you wrote?

Sure… but if you don’t understand the differences you might end up with yet another compiling error.

Also, how do I fix the variable password in the declare issue?

Change one or the other to match. Eg. use pass or password in both places, otherwise they are actually considered two totally separate variables.

BTW, I also have an Ultrasonic example sketch here that adds in a servo response…

C++ Blynk - Code Examples for Basic Tasks (Work in Progress)

#16 - Ultrasonic Distance Sensor with Servo This little project used the HC-SR04 Ultrasonic sensor… but instead of boring old distance numbers, it will also position a servo within a range of selected distances. This sketch demonstrates a timer that can be enabled and disabled, so as not to be running something like the Ultrasonic sensor if other critical timing functions need to run. And also demonstrates enabling and disabling the servo, so that there is no jitter or fluttering when it is n…

[beiracing77]

Ok, thank you.
I tried your, timer.setInterval(1000L, distanceReading()); // Call the scanning function directly, and got an error saying -distance reading was not declared in this scope-
When I put the original one back in I got an error - My timer event not declared in this scope-.
Do you have any ideas on these?

[PeteKnight]

Do you have any ideas on these?

It’s exactly as @Gunner predicted…

if you don’t understand the differences you might end up with yet another compiling error

You really need to understand at least the basics of C++ programming if you’re going to make any progress with this, or get someone else to modify the code for you.
The time you invest in learning will be useful in the long run.

Pete.