Ultrasound sensor in Snap4Arduino

[Bernat Romagosa]

We've managed to hook it up! :)

Here's the blog post with a video and all files you'll need to control an ultrasound sensor from Snap4Arduino:

http://blog.s4a.cat/2015/03/31/Ultrasound-Library-for-Snap4Arduino.html

Just specify the pin where you've connected it and you're done!

The formula to convert from the value the sensor gives and centimeters is to just divide it by 58.

Enjoy!

--

Bernat Romagosa

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[蔡其蓁]

Thank you so much for the wonderful work.

[Tom....@madatech.org.il]

I have modified the code to work with HC-SR04 popular ultrasonic sensor with TRIG/ECHO (4 pins)
I cannot upload so this is the snippet that needs changing
this assumes ECHO pin is connected at the pin next to TRIG (ex. 2, 3)

---------

unsigned long pollUltrasound(int pin) {
pinMode(pin, OUTPUT);
pinMode(pin+1, INPUT);
digitalWrite(pin, LOW);
delayMicroseconds(2);
digitalWrite(pin, HIGH);
delayMicroseconds(5);
digitalWrite(pin, LOW);

return pulseIn(pin+1, HIGH);// add this for conversion to cm: / 29 / 2;
}

[Bernat Romagosa]

Hi Tom!

Thanks for the modification, we'll feature it in our official site soon.

Cheers!

Bernat.

}

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[mza...@gmail.com]

Hi,

My daughter tried to follow the instructions on the most recent version (1.6) and there is no File->Import option... Only Import Project.
Also, once sketch is uploaded, S4A doesn't seem to connect to Uno (it's connecting with the regular sketch).

Should the library still work on the recent version?

thanks,
Michael

[Bernat Romagosa]

Hi Michael!

I think you may be downloading the wrong software (S4A vs Snap4Arduino). The latter can be found at http://snap4arduino.org.

Cheers,

Bernat.

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Bernat Romagosa

[이기호]

Hi~ Thank you for your valuable information

I have a question related with HC-SR04.

I uses TRIG pin to digital 9 and ECHO pin to analog 5.

In this case How to modify javascript code.

Can you help me? or anybody else?

2015년 5월 31일 일요일 오전 12시 25분 52초 UTC+9, Tom....@madatech.org.il 님의 말:

[이기호]

I solve the problem...

s4a gives me hint

unsigned long pollUltrasound(int pin) {

 

  long duration, distance1, distance0;

  if(distance1 > 1)

    distance0=distance1;

  

  pinMode(pin, OUTPUT);    // ponemos el pin 3 como salida

  pinMode(A5, INPUT);    // cambiamos el pin como entrada

  

  digitalWrite(pin, LOW);

  delayMicroseconds(2);                 // give a short LOW pulse beforehand to ensure a clean HIGH pulse

  digitalWrite(pin, HIGH);    // lo activamos

  delayMicroseconds(5);    // esperamos 10 microsegundos

  digitalWrite(pin, LOW);     // lo desactivamos

   duration = pulseIn(A5, HIGH, 50000);  // lee el tiempo que tardo el pulso en regresar echo

  distance1 = duration / 29 / 2;  // calculo de la distancia en cm

  if (distance1==0)

    distance1=distance0;

  return distance1;// add this for conversion to cm: / 29 / 2;

}

return cm 

don't need to calculate return values.

2017년 5월 24일 수요일 오후 1시 42분 36초 UTC+9, 이기호 님의 말:

[Armaan]

sir pls help me! i havee to do this project  soon!!! likee sooooo soon and i found you but the thing is am using hc-sr04 and the frimataa is not loading can u pls hlp me by sending the link for tht waiting for your reply ........... yours Armaan

[Armaan]

sir tq i appreciate ur work but the thing is i have thee latest version of ultrasonic sensor which is HC-SR04 but i guess the ultrasonic senor u hav used is different so..... it would be a great hlp if u hlp me with tht pls am just a 13 year old boy i wanna learn and explore and the possible way is u pls hlp me pls......... Armaan

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[Joan Guillén i Pelegay]

Hi Armaan,

What is "the latest version" of the ultrasonic sensor?

More or less, all those HC-SR04 sensors are the same. I guess you can use our firmware and blocks without any problem.

Notes:

- That sensor works at 5V. If you are using 3.3V, the sensor doesn't run ok. It is not about the firmware, is about the sensor itself.

- Usually you have two pins (echo and trigger) but some sensors have only one pin (three pins in total). But this is not a problem. In that case (3 pins) echo and trigger are the same pin.

Joan

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