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Hello,

I need to set some variables. Those variables are positions of motors that I use in my project. I want to set those variables because I want to continue work if device restarts somehow.

I'm setting the devices position after each step. When stepping job done, I use save() function to save current position.

But this way causes some conflicts, I think it doesn't only change value and save it. It appends some code after my pure code, then saves it.

Are there a better way to set variables without using an external storage device?

Yes, I have copied and paste it here. All outputs are correct.
I don't know how can It be.

I'm trying to code "Reset to factory defaults" function, Every think is OK but I need to reboot the board.

Are there a way to reboot the board?

@allObjects

No I didn't check time/profile, I don't have any idea how to check it.
Timing is not critical for me, that's why I will continue on this way.
I'm going to check if this problem occurs only on my board and write it here.

@Gordon
Thanks for your response. I think there is no short circuit. There is only one button plugged on the board, no thing else.

Debounce doesn't help me, I have tried various variables. from 1 to 300.

I'm trying more than one button, I think it is not a mechanical problem.

Power saving is not important for me at the moment, I'm pluging it to direct electric source.

I have coded a class for this problem. Works great and stable for me. I'm sharing it.

watchClass=function(pin,callback){
    var lastTime=0;
    lastState=1;
    var interval=setInterval(function(){
        currentState=digitalRead(pin);
        currentTime=getTime();
        if (currentState!=lastState) {
            var e={
                state:currentState,
                lastTime:lastTime,
                time:currentTime
            }
            lastTime=currentTime;
            lastState=currentState;
            callback(e);
        }
    },30);
}
pinMode(E2, "input_pulldown");
x=new watchClass(E2,function(e){
console.log(e);
});

smilar error occurs on the boards button BTN1, but it is more stable.

Hello,

I'm using setwatch to detetch keypress events. I wired up a pin as button. Voltage flows as "5V -> Button -> E2 Pin"
I'm using STMF32F4 Discovery.

Here is my code :

var button1=E2;

pinMode(button1, "input_pulldown");


setWatch(function(e) {
       console.log(e);
        }, button1, { repeat: true, edge: "both",debounce:10});

Some times it prints console while I'm not pressing button. Some times prints 2-3 times on a button press. Some times it doesn't print anything. So, I can't understand which is the real button press event;

Here is the output :

{ "state": true, "lastTime": undefined, "time": 2106.83884495238 } 
{ "state": false, "lastTime": 2106.83884495238, "time": 2107.13843809523 }
{ "state": true, "lastTime": 2107.13843809523, "time": 2102.44481219047 } 
{ "state": false, "lastTime": 2102.44481219047, "time": 2108.03721752380 }
{ "state": false, "lastTime": 2108.03721752380, "time": 2106.63911619047 }
 { "state": true, "lastTime": 2106.63911619047, "time": 2106.43938742857 } 
{ "state": true, "lastTime": 2106.43938742857, "time": 2107.33816685714 } 
{ "state": false, "lastTime": 2107.33816685714, "time": 2107.53789561904 } 
{ "state": true, "lastTime": 2107.53789561904, "time": 2107.13843809523 } 
{ "state": true, "lastTime": 2107.13843809523, "time": 2108.03721752380 } 
{ "state": false, "lastTime": 2108.03721752380, "time": 2107.13843809523 } 
{ "state": false, "lastTime": 2107.13843809523, "time": 2122.91701028571 } 
{ "state": false, "lastTime": 2122.91701028571, "time": 2122.91701028571 } 
{ "state": false, "lastTime": 2122.91701028571, "time": 2126.01280609523 } 
{ "lastTime": 2126.01280609523, "time": 2126.81172114285, "pin": E2, "state": true } 
{ "state": false, "lastTime": 2126.81172114285, "time": 2127.11131428571 } 
{ "state": true, "lastTime":2127.11131428571, "time": 2127.11131428571 } 
{ "state": true, "lastTime": 2127.11131428571, "time": 2125.81307733333 } 
{ "state": false, "lastTime": 2125.81307733333, "time": 2132.90344838095 } 
{ "state": true, "lastTime": 2132.90344838095, "time": 2125.91294171428 } 
{ "state": true, "lastTime": 2125.91294171428, "time": 2133.30290590476 } 
{ "state": false, "lastTime": 2133.30290590476, "time": 2133.50263466666 } 
{ "state": true, "lastTime": 2133.50263466666, "time": 2132.40412647619 } 
{ "state": true, "lastTime": 2132.40412647619, "time": 2131.90480457142 } 
{ "state": false, "lastTime": 2131.90480457142, "time": 2133.60249904761 }

Yes, I'm going to use 7 steppers in my project. It is not only about steppers, OOP is easiest way to build application for me.

By taking advantage @Gordon's code I have build my OOP like this; The way below is easy to read and understand the code for me.

modules/stepperClass.js

exports.stepperClass = function (p1, p2, p3, p4) {
    var step = 0;
    var steps = [0b0001, 0b0011, 0b0010, 0b0110, 0b0100, 0b1100, 0b1000, 0b1001];
    var stepperPins = [p4, p3, p2, p1];

    this.writeStep = function () {
        step++;
        digitalWrite(stepperPins, steps[step % steps.length]);
    };

    this.stop = function () {
        digitalWrite(stepperPins[0], LOW);
        digitalWrite(stepperPins[1], LOW);
        digitalWrite(stepperPins[2], LOW);
        digitalWrite(stepperPins[3], LOW);
    };

    this.doStep = function (cnt) {
        for (i = 0; i < cnt; i++) {
            x = 0;
            while (x < 10) x++;//delay a little bit
            this.writeStep();
        }
        this.stop();
    };

projects/main.js

var stepperClass=require('stepperClass').ste­pperClass;

stepper1=new stepperClass(A1,A2,A3,A4);
stepper2=new stepperClass(B1,B2,B3,B4);
stepper3=new stepperClass(C1,C2,C3,C4);

stepper1.doStep(100);
....
....
....

Yes, I'm doing it with projects options in Web IDE.

How to import a class that gets parameters on construction like this :

modules/stepper.js

var stepperClass = function (p1, p2, p3, p4) {
    var step = 0;
    var steps = [0b0001, 0b0011, 0b0010, 0b0110, 0b0100, 0b1100, 0b1000, 0b1001];
    var stepperPins = [p4, p3, p2, p1];
    this.writeStep = function () {
        step++;
        digitalWrite(stepperPins, steps[step % steps.length]);
    };
    this.stop = function () {
        digitalWrite(stepperPins[0], LOW);
        digitalWrite(stepperPins[1], LOW);
        digitalWrite(stepperPins[2], LOW);
        digitalWrite(stepperPins[3], LOW);
    };
    this.doStep = function (cnt) {
        for (i = 0; i < cnt; i++) {
            x = 0;
            while (x < 10) x++;
            this.writeStep();
        }
        this.stop();
    };
};

Hello,

I'm trying to build my application as OOP, that's why I have parted all classes in different files. I have placed those files in modules directory.

Example ;

modules/connectionClass.js

var connectionClass=function(){
    getVars=function(){
        return {social_id:Math.floor((Math.random() * 4)),text:zeroFill(Math.floor((Math.rando­m() * 10) + 1),6)}
    };
}

modules/helper.js

function zeroFill( number, width )
{
    width -= number.toString().length;
    if ( width > 0 )
    {
        return new Array( width + (/\./.test( number ) ? 2 : 1) ).join( '0' ) + number;
    }
    return number + ""; // always return a string
}

projects/main.js

require('connectionClass');

var connection=new connectionClass();

But at the line var connection=... I'm getting this error

Uncaught Error: Field or method does not already exist, and can't
create it on undefined at line x col y

What I am doing wrong?

Yes, I have counted it step by step. In order to get a full tour I need to call doStep() 512 times . This motors stride angel is 64, so it is mutliplied by 8.

Thank all again, I have made it work with your helps.

First thanks all, at the end I could drive it normally. Here is my code

var step = 0;
var steps = [0b0001,0b0011,0b0010,0b0110,0b0100,0b11­00,0b1000,0b1001];
var stepperPins = [E13,E11,E9,E7]; // Change these to pins for your motor driver
function doStep() {
 step++;
 digitalWrite(stepperPins, steps[step % steps.length]);
}

function stop(){
  digitalWrite(stepperPins[0],LOW);
  digitalWrite(stepperPins[1],LOW);
  digitalWrite(stepperPins[2],LOW);
  digitalWrite(stepperPins[3],LOW);
}

function go(f) {
  for (i=0;i<f;i++) {
    x=0;
    while (x<10) x++;//Delaying needed I don't know why.
    doStep();
  }
  stop();
}

Can you explain me please how much degrees does the motor moves for each doStep() call?
I think it must move 5.625° for each doStep() but it is not, may be it is 32 time less than 5.625°.

Also, I have tried both 5V and 9V , 9V has a great torque. 5V some times unable to start spinning, torque is not hight.

Hi @Gordon,

I don't know why, but when I remove the while(i!=3)i++; line stepper stops working. Change interval to 2-3-4 doesn't help. I have tried to change interval from 1 to 100 but no effect.

Also change polarity didn't do any effect; Leds and motion is the same

digitalWrite(stepperPins[0],!(stepval&1)­);
digitalWrite(stepperPins[1],!(stepval&2)­);
digitalWrite(stepperPins[2],!(stepval&4)­);
digitalWrite(stepperPins[3],!(stepval&8)­);

Hello,

There is many questions, I'm sorry if I forgot to answer anyone.

At first, all 3 code work. The first code that write at the start of this thread works so slow.
The second one (http://forum.espruino.com/comments/12041­929/) works good bot not fast as @DrAzzy's code (http://forum.espruino.com/comments/12042­026/)
@DrAzzy code is the fastest (Apx. 13 RPM) When I use this code leds are not blinking in sequence any more. Leds allways on.

I think that I'm wiring up correctly.

I'm using stm32F4DISCOVERY. I'm using my boards power supply(5+), today I'm going to try with +9 Volt external battery and write results here.

I have catched an interesting point.
@DrAzzy's code works good but only with console.log("doing step:"+step); line.
When I comment out this line it doesn't work :)

Also, when I flash the code -with save()- in to the device and restart it @DrAzzy's code doesn't works. It's about console.log() command. I think console.log() command doesn't work if device is working stanalone.

So, I thought that it needs to wait a little bit before doing next step, here is my new code works good without comments and after save()

var step = 0;
pinMode(D1,'output');
pinMode(D2,'output');
pinMode(D3,'output');
pinMode(D4,'output');
var steps = [0b0001,0b0011,0b0010,0b0110,0b0100,0b11­00,0b1000,0b1001];
var stepperPins = [D4,D3,D2,D1]; // Change these to pins for your motor driver
function doStep() {
 step++;
  i=0;
  while(i!=3)i++; //delay a little bit before doing steps. Better than console.log()
var stepval=steps[step % steps.length];
digitalWrite(stepperPins[0],stepval&1);
digitalWrite(stepperPins[1],stepval&2);
digitalWrite(stepperPins[2],stepval&4);
digitalWrite(stepperPins[3],stepval&8);
}
var stepInterval = setInterval(doStep, 1);

But I would want to understand why the code below doesn't work?It is expected to do same think but not.

var step = 0;
var steps = [0b0001,0b0011,0b0010,0b0110,0b0100,0b11­00,0b1000,0b1001];
var stepperPins = [D1,D2,D3,D4]; // Change these to pins for your motor driver

function doStep() {
 step++;
 digitalWrite(stepperPins, steps[step % steps.length]);
}
var stepInterval = setInterval(doStep, 1);

Hi @russdx,

As you pointed; I have converted the code to javascript.at the end It worked great :)
Here is what I have done

var Pin0 = D1;
var Pin1 = D2;
var Pin2 = D3;
var Pin3 = D4;
var _step = 0;
var boolean=true;
var dir = true;

function setup() 
{ 
 pinMode(Pin0, OUTPUT);  
 pinMode(Pin1, OUTPUT);  
 pinMode(Pin2, OUTPUT);  
 pinMode(Pin3, OUTPUT);  
}

function loop() 
{ 
 switch(_step){ 
   case 0: 
     digitalWrite(Pin0, LOW);  
     digitalWrite(Pin1, LOW); 
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
   break;  
   case 1: 
     digitalWrite(Pin0, LOW);  
     digitalWrite(Pin1, LOW); 
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, HIGH); 
   break;  
   case 2: 
     digitalWrite(Pin0, LOW);  
     digitalWrite(Pin1, LOW); 
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
   break;  
   case 3: 
     digitalWrite(Pin0, LOW);  
     digitalWrite(Pin1, HIGH); 
     digitalWrite(Pin2, HIGH); 
     digitalWrite(Pin3, LOW); 
   break;  
   case 4: 
     digitalWrite(Pin0, LOW);  
     digitalWrite(Pin1, HIGH); 
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
   break;  
   case 5: 
     digitalWrite(Pin0, HIGH);  
     digitalWrite(Pin1, HIGH); 
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
   break;  
     case 6: 
     digitalWrite(Pin0, HIGH);  
     digitalWrite(Pin1, LOW); 
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
   break;  
   case 7: 
     digitalWrite(Pin0, HIGH);  
     digitalWrite(Pin1, LOW); 
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, HIGH); 
   break;  
   default: 
     digitalWrite(Pin0, LOW); 
     digitalWrite(Pin1, LOW);
     digitalWrite(Pin2, LOW); 
     digitalWrite(Pin3, LOW); 
   break;  
 } 
 if(dir){ 
   _step++; 
 }else{ 
   _step--; 
 } 
 if(_step>7){ 
   _step=0; 
 } 
 if(_step<0){ 
   _step=7; 
 } 
}
setup();
var stepInterdal = setInterval(loop, 1);

Thanks for your answer @Gordon
I have wired it up like this

Stepper Pin 1-D1
Stepper Pin 2-D2
Stepper Pin 3-D3
Stepper Pin 4-D4

My new code is below, I'm changing the sequence by code

var step = 0;
var targetStep = 0;
var steps = [0b0001,0b0010,0b0100,0b1000];
var stepperPins = [D1,D3,D2,D4];

function doStep() {
 step++;
 digitalWrite(stepperPins, steps[step % steps.length]);
}
var stepInterval = setInterval(doStep, 100);

Now leds blinking in 1-3-2-4 sequence, but now it is juddering back-forward with very very small and quick steps. It is not forwarding any more.

Also, I have forgot to tell; I'm using ULN2003 driver that shown here : http://www.instructables.com/id/BYJ48-St­epper-Motor/

Addition :
This step motor works really fast, please check this video. Stepper in the video works 20 times faster than mine. The same stepper and driver I have.
http://www.youtube.com/watch?v=KPR1Zt37G­PE

it is juddering, it only goes to forward never comes back. I think orders are correct.
I can see all leds are blinking one by one, in sequence. I think this means that stepper motor wired up correctly.

It doesn't plugged to a gear, it is working freely.

Hello,

I'm using this code to run my step motor :

var step = 0;
var steps = [0b0001,0b0010,0b0100,0b1000];
var stepperPins = [A3,A2,B10,B11]; // Change these to pins for your motor driver

function doStep() {
 step++;
 digitalWrite(stepperPins, steps[step % steps.length]);
}
var stepInterval = setInterval(doStep, 200);

I'm using 28BYJ-48 – 5V stepper motor and controller : http://robocraft.ru/files/datasheet/28BY­J-48.pdf

But it works so slow, approximately 0.5RPM. When I set interval to 30ms it is a little bit faster, but approximately 1RPM. I have tried with 5V and 9V input.

What I am doing wrong?

Yes, my logic was right. It was about wiring problem. Code works fine for me except of getting IP address. I'm now trying to get an IP address.

I'm sorry to say that, It was about wiring problem. I have verified it, now I can runn all commands but still can't get the IP Address. I will write here my proccess.

Thanks for all helps.

I'm trying @JumJum 's code init function allways return false. I'm a newbie, I don't know if my device works and wired properly.

I have tracked the code, I see that code enter in to sendCommandWaitFor() function but it never enters inside sp.on('data',function(d){}); function.
I think it means that I can send command but it doesn't return any data. So, my device doesn't wired properly or not working.

Is my logic right?

Thanks for your response, but no way, it didn't worked again. I'm giving up for now.
Here is the error message :

Uncaught Error: No Acknowledgement  at line 1 col 46 var wifi = require("ESP8266").connect(Serial4);
                                              ^ Uncaught Error: Field or method does not already exist, and can't create it on undefined  at line 2 col 5 wifi.connect("WiFi_Name","WPA2_Key", function() {
     ^ in function called from system

@Gordon thanks for your response.

I have tried only this code, but result is the same:

Serial4.setup(115200, { rx: C11, tx : C10 }); 
var wifi = require("ESP8266").connect(Serial4, function() {   
wifi.connect("WiFi_Name","WPA2_Key", function() {   
}); 
});

I think you are pointing this thread on the forum : http://forum.espruino.com/conversations/­253943/?offset=25
I'm going to check it.

Thanks.