Class Projet 1

Projects Programming
1

Hello;
I'm trying to solve the problem here:
Realize a system measuring an ultrasonic distance, and taking into account the temperature for the ultrasonic propagation speed (other assumptions: altitude 0 and dry air). Distance and temperature will be displayed on the serial monitor.
Attention: for more precision you will take two temperature sensors and you will do their average. If you detect a problem in the sensors (more than 0.5 ° C difference), switch on a red LED.
Material: HC-SR04 + TMP36 + 74HC151 + Arduino

To solve the problem, I propose the following algorithm:

int Value1; 
int Value2;
int S0=1;
int S1=2;
double temps;//Or time
double distance;//Distance
double vitesse=0.034;//Speed

void setup()
{
pinMode(S0, OUTPUT);
pinMode(S1, OUTPUT);
digitalWrite(S1,LOW);
digitalWrite(S0, LOW);
pinMode(7, OUTPUT);
 digitalWrite(7, LOW);
 Serial.begin(9600);
  pinMode(2, OUTPUT);


}
void loop()
{
digitalWrite(S1,LOW);
digitalWrite(S0, LOW);
pinMode(7, OUTPUT); 
digitalWrite(7, HIGH);
delay(15);
digitalWrite(7, LOW);
digitalWrite(S0, HIGH);
digitalWrite(S1,LOW);
Serial.print("Capteur");
pinMode(7, INPUT);
temps=pulseIn(7, INPUT);
distance=(float)((vitesse*temps)/);
Serial.println("La distance est:")//The distance is 
Serial.print(distance);
digitalWrite(7, LOW);
digitalWrite(S0, LOW);
digitalWrite(S1,HIGH);
pinMode(7, INPUT); 
Value1=analogRead(7);
digitalWrite(S1,HIGH);
digitalWrite(S0,HIGH);
 pinMode(7, INPUT);
  Value2=analogRead(7);
  Serial.println("Premier capteur");
  Serial.print(Value1);
  Serial.println("Second capteur");
   Serial.print(Value2);
   if ( abs( Value1- Value2)<0.5)// Connected to led for blinking it 
   {
     pinMode(2, OUTPUT);
     digitalWrite(2,HIGH); 
     
   }

Can you tell me if it's okay please?

2

Can you tell me if it's okay please?

No, it isnt, but the compiler already told you that.

Also, pulseIn returns an unsigned long, not a float.

(How is it that this is project 1 in English, but project 2 in French?)

3

To answer your question I posted on the English and French forum. To have answers more quickly.
In addition I initialize the function PulseIn with signature "double" with the variable "time".

4

To answer your question I posted on the English and French forum.

So, which topic do you want me to delete?

In addition I initialize the function PulseIn with signature "double" with the variable "time".

No.

5

Can you give the answer . Because i'm Noobie .

6

I already did give you an answer, in my first reply.

Now, which topic do you want me to delete?

7

Delete All in french please .
Can you help me for my " Class projet 2" too?
Then how modificate "Class Projet 1" 's algorithm ?

8 
int S0=1;
...
pinMode(S0, OUTPUT);
...
 Serial.begin(9600);

Do you see the problem here?

9

No
Explain to me please..

10

Look carefully at your Arduino.
Look what it says next to pin 1.

11

I just saw that the pin 1 does not correspond to what I ask him to do. I would choose another. Pin 2, for example. Apart from that, do you think that the program will work ?

12

Code that does not compile cannot work.

13

Hum...what kind of maths is this? distance=(float)((vitesse*temps)/);

What is connected to pin 7?

...
temps=pulseIn(7, INPUT);
...
Value1=analogRead(7);
...
Value2=analogRead(7);

Don’t mess with pins 0 and 1 if you use the Serial (the USB cable communication with your computer goes in there)

14

J-M-L:
What is connected to pin 7?

...

temps=pulseIn(7, INPUT);
...
Value1=analogRead(7);
...
Value2=analogRead(7);

Analogue pin seven (assuming this is not a Uno) is a different pin to digital pin seven.

15

I use a Arduino Uno . And i saw on the Website that , i can use "analogRead" even the port isn't analog .
Or it's false ?

16

And i saw on the Website that , i can use "analogRead" even the port isn't analog .
Or it's false ?

That is not true. analogRead() ONLY operates on analog pins. digitalRead() will work on the analog pins, though, since the analog pins are also digital pins.

17

PaulS:
That is not true. analogRead() ONLY operates on analog pins. digitalRead() will work on the some* analog pins, though, since the some* analog pins are also digital pins.

*On products where the A6 and A7 pins are present, these are analogue-only inputs.

18

AWOL:
Analogue pin seven (assuming this is not a Uno) is a different pin to digital pin seven.

Yes - but probing / wanted to double check as I suspected uno being used and OP not making the difference.