Movement data display in Graph and Steps Counter

[espruino-discuss]

Posted at 2018-04-05 by Pzr0

Hello Gordon,
I would like to display in graph all the movement data(moving or be still) and also is it possible to count how many steps i do as i walk?? Also i want to put a password for my puck when it's time to connect with it
Thanks in advance!

[espruino-discuss]

Posted at 2018-04-06 by @gfwilliams

Hi - where do you want to display the graph? On a Web Page? If so, the http://www.espruino.com/Web+Bluetooth+Dashboard page is probably pretty useful.

I'm afraid you can't easily get the number of steps though (without adding a separate accelerometer), but you can use the Magnetometer to get a good idea of when the Puck is/isn't moving.

To set a password, just use the http://www.espruino.com/Reference#l_E_setPassword command

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Posted at 2018-04-07 by Pzr0

could you please send me sample of movement function in dashboard and setpassword function also? thanks

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Posted at 2018-04-09 by @gfwilliams

For movement, there's a thread on it here: http://forum.espruino.com/conversations/301185/

Maybe increment a counter based on movement (instead of the LED.write) and then use that counter in the Web Bluetooth example instead of E.getTemperature()

Use E.setPassword("password") for the password.

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Posted at 2018-04-09 by Pzr0

Last thing please.. Just want to know how to implement this code http://forum.espruino.com/conversations/­301185/ in my web bluetooth dashboard in order to get live graph for every value I get.. Thanks in advance!

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Posted at 2018-04-10 by @gfwilliams

Something like this:

var avr = Puck.mag();
var magDiff;
var movementCounter = 0;
var magCounter = 0;
Puck.on('mag', function(xyz) {
  // work out difference in field
  var dx = xyz.x-avr.x;
  var dy = xyz.y-avr.y;
  var dz = xyz.z-avr.z;
  magDiff = Math.sqrt(dx*dx+dy*dy+dz*dz);
  // update average
  avr.x += dx/2;
  avr.y += dy/2;
  avr.z += dz/2;  
  magCounter++;
  if (magDiff > 50) movementCounter++;
});
Puck.magOn();

setInterval(function(){
  var movement = movementCounter / magCounter;
  movementCounter = 0;
  magCounter = 0;
  Bluetooth.println(movement);
}, 60000 /* update every minute */);

But you then need to remove the whole connection.write("reset();\n", function() { .... part from the Web Bluetooth example.

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Posted at 2018-04-10 by Pzr0

Thanks.. Do I have to put the whole piece of code in my connectDevice() function and get the movement value like that? elements.movement.setValue(j.movement); and then display that in my graph because I tried and i saw nothing to be displayed. Sorry for the inconvenience..

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Posted at 2018-04-10 by @gfwilliams

try just elements.movement.setValue(j)?

You could stick it in your connectDevice function yes (leaving the reset() part in and just changing the code it uploads).

Otherwise you could remove the reset and upload the code to the Puck separately - which would allow you to maybe keep a history of movement in the Puck and initially populate the graph.

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Posted at 2021-08-12 by Yuvika

Hi Gordon,
I am doing this project where I need to create step counting goals by asking the user what the goal is, then they answer, and it starts step counting. Could you help me?

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Posted at 2021-08-12 by @gfwilliams

What device are you doing this on? It might alter how you want to enter the information.

But having said that are you doing this for something like a university project? If so I guess the idea was that you figure this out, so apart from giving some pointers I probably can't be too much help!

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Posted at 2021-08-12 by Yuvika

I'm using a puck.js, and it's for a kids coding class

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Posted at 2021-08-13 by Yuvika

My project is due in a few days

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Posted at 2021-08-13 by @gfwilliams

Ok - so where are you supposed to ask the user what the goal is? On a Web Bluetooth website? Or via the Puck itself?

If so I guess you're going to have to count the number of times the button is pressed to input the goal - it could make it a bit of a pain to use?

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Posted at 2021-08-13 by Yuvika

On the espruino.web/ide/ website

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Posted at 2021-08-14 by user133129

hi gordon,

I have a project due tomorrow and we are wrapping up, but I see a few issues and wondering if you can help me with it. The first problem i ran into was that if i put a goal higher than 30, the puck thinks that 30 is the goal but the goal is 40 (shown in provided screenshots). On the code it says "if steps 30", then print "congratulations you have reached the goal". When we set the goal i want the if step is 30 and you said 40 in the what is your goal, the 30 should change to 40. Is there any possible way to fix that? Also we want all LEDS to flash, can you give us a easy code for that?

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Attachments:

• Screen Shot 2021-08-14 at 5.22.53 PM.png
  
• Screen Shot 2021-08-14 at 5.20.37 PM.png

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Posted at 2021-08-15 by Robin

Sun 2021.08.15

Hi @user133129

Some thoughts as a suggestion, untested:

Replace the constant number 30 with a global variable if(steps == 30)
Declare that variable just below the var definitions assignments section

Follow along with this discussion on how to capture input:

What command to use in Espruino instead of prompt

How to implement a simple text menu in console?

via web page    https://www.espruino.com/Web%20Bluetooth

To flash LEDs

See examples below heading 'On-board LEDs, Button and GPIO'

http://www.espruino.com/Puck.js

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Posted at 2021-08-15 by Yuvika

Replace the constant number 30 with a global variable if(steps == 30)
Declare that variable just below the var definitions assignments section
What does that mean????

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Posted at 2021-08-15 by Robin

Is your code block from an existing tutorial?

Your var definitions

var steps = 0;
var stepsOn = 0;

As the code block did not have line numbers, explaining where to insert code became problematic.

As a suggestion, highlight your code in the edit window, then click on the < / > code button located between the Quote and Donate button

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Posted at 2021-08-16 by user133129

Hi, I need to define a variable goal and goal will be given by user input, what function do we use?

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Posted at 2021-08-16 by @gfwilliams

Actually getting user input can be a little tricky, so what I'd say is you get the user to type GOAL=40 rather than just 40:

var GOAL = 30;
print("What is your goal?");
Bluetooth.inject("GOAL="); // writes 'GOAL=' to the input line
// ...
if (steps == GOAL) print("Congratulations ... ");

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Posted at 2021-08-16 by Yuvika

Does this code look good?
setWatch(function(e) {
if(e.time - e.lastTime > 1) {
console.log(require("puckjsv2-accel-steps").off());
}
}, BTN, { repeat:true, edge:'falling' });
var lastTimePressed = 0;

setWatch(function(e) {
if((e.lastTime - lastTimePressed) < 1) {
console.log(require("puckjsv2-accel-steps").on());
console.log(steps = 0);
}
lastTimePressed = e.lastTime;
}, BTN, { repeat:true, edge:'falling' });
var steps = 0;
var stepsOn = 0;
Puck.on('accel',function(a) {
steps++;
print(steps);
if(steps == 10){
print("Congratulations! You have reached your first goal!");
print(steps);
setTimeout(function () {
console.log(LED1.set());
}, 100);
setTimeout('console.log(LED1.reset());', 5000);
}
if(steps == 20){
print("Congratulations! You have reached your second goal!");
print(steps);
setTimeout(function () {
console.log(LED2.set());
}, 1000);
setTimeout('console.log(LED2.reset());', 5000);
}
if(steps == GOAL){
print("Congratulations! You have reached your final goal!");
print(steps);
setTimeout(function () {
console.log(LED3.set());
}, 1000);
setTimeout('console.log(LED3.reset());', 5000);
}
});
setWatch(function()
{ if(stepsOn === 0) {
require("puckjsv2-accel-steps").on();
var GOAL = 30;
print("What is your goal?");
Bluetooth.inject("GOAL=");
stepsOn = 1;
}
}, BTN, { edge: "rising", debounce: 50, repeat: true });

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Posted at 2021-08-16 by Yuvika

I'm in the same group as user133129. We are working together

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Posted at 2021-08-16 by user133129

yeah

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Posted at 2021-08-16 by user133129

hi robin and gordon,

Thanks for the advice as it worked really well. However, I'm still confused for all the LEDS to flash when the goal is reached. We know how to set a timer for how long should all the LEDS flash but we don't know how to make it flash. Before we could used
(var l;setInterval("digitalWrite(LED1,l=!l);",200);
var l;setInterval("digitalWrite(LED1,2=!l);",200);
var l;setInterval("digitalWrite(LED1,3=!l);",200);)
but it doesn't work anymore. I tried one of them but it was not flashing. Do you guys have any ideas?

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Posted at 2021-08-16 by @gfwilliams

I think you're seeing l=!l and thinking it's the number one, not the letter l?

If you want them all to blink the same, it's best just to use the single variable l and call digitalWrite 3 times:

var l;setInterval("l=!l;digitalWrite(LED1,l);digitalWrite(LED2,l);digitalWrite(LED3,l);"­,200);

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Posted at 2021-08-16 by user133129

it works thanks

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Posted at 2021-08-16 by user133129

also thank you robin and gordon for helping us on our project

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Posted at 2021-08-16 by Yuvika

Thanks!