Different setInterval

[espruino-discuss]

Posted at 2021-04-03 by psc1988

Is it possible to set different intervals?

I have two operations using setInterval().
One is to read out a sensor via I²C and on the other hand I would like to let a LED blink, depents on the counter value, e. g. counter == 3 >>> LED should blink 3 times all 10 seconds.

My problem is that the LED blinks continiously - I tried it with arguments but it does not work.

///Sensor_Data        
     setInterval(() => {
     i2c.writeTo(0x18, 0xAA, 0x00, 0x00); 
     setTimeout(() => {
     let output = i2c.readFrom(0x18, 5);
     var output_bit = output[1] *100 *100 + output[2]*100 + output[3];    
     var pressure1 = (output_bit-1200000)*(1-(-1));
     var pressure2 = pressure1/(1500000-1200000);
     var pressure_final = pressure2 + (-1) - 0.29;    
     log(pressure_final, counter);  
///Counter    
     if (pressure_final < -0.2) {
     status_counter = 1;
     }
     if ((status_counter == 1) && (pressure_final > -0.2) && (pressure_final < 0.2)) {
     counter = counter + 1;            
       if (counter + 1) {
       status_counter = 0;}
       }
         if (counter > 6){
         counter = 1;
         }

[espruino-discuss]

Posted at 2021-04-03 by Robin

Sat 2021.04.03

'Is it possible to set different intervals?'

Yes

'LED should blink 3 times all 10 seconds'

Unsure of intention here ref 'all 10'

'the LED blinks continiously - I tried it with arguments but it does not work'

Missing logic for LED control and the 'tried it' code block


Hi @psc1988 in post #1 code snippet L2, L4, L15, L22, it appears there are mismatched closing curly braces, along with no LED control logic, making comprehension difficult, so I created one possible stand alone code block.

const BLINK_TIMES = 3;
const PIN_LED = B4;  // Device dependant - external LED

var doOnce = 1;

// sec
var durationTest = 12;
var durationWait = 2;

// msec 
var delay = 600;  // Arbitrary screen update interval
var timeout = 3500;

var durationBlink = 40;


var timeStart = 0;
var timeStop  = 0;
var timeCurr  = 0;
var timeElapsed = 0;

// http://www.espruino.com/Reference#l__global_getTime
// Return current system time in Seconds (as a floating point number)
//>getTime()
//=946685458.84333419799


// Interval timer

var intervalID = {};
var timeoutID  = {};
var blinkID    = {};

function ci() { clearInterval( intervalID ); }
function cb() { clearInterval( blinkID ); }
 

function startTest() {
  var toggle = false;
  var nCount = BLINK_TIMES;
  
  timeStart = getTime();
  timeStop  = timeStart + durationTest;
  
  
  intervalID = setInterval(function () {

      timeCurr = getTime();

      // When duration of test is over stop the timer
      if ( timeCurr >= timeStop ) { ci(); intervalID = null; }

      // Send our write command to our external device
      if( ( timeCurr >= (timeStart + durationWait) )  &&  ( doOnce ) ) {
    
        doOnce--;
    
        // Send a command instruction to external device
        Serial1.write([0xB5,0x62]);   // arbitrary - modify as required
        console.log( "L60     Sending write command to device" );

        timeoutID = setTimeout(function () {

          // After a specific time, attempt to read that device response
          Serial1.write([0x85]);   // arbitrary - modify both as required
          var dataRecd = getData(); 
          console.log( "L67    Sending read command to device" );


          blinkID = setInterval(function () {

            if ( nCount < 0 ) {  cb(); blinkID = null; }

            // ternary operator
            toggle = toggle ? false : true;

//DEBUG:    console.log( "L77  toggle: " + toggle );
            console.log( "L78  State LED: " + ( toggle ? "on" : "off" ) );
//DEBUG:    console.log( "L79  count: " + nCount + "   toggle: " + toggle );

            // Set state of LED - watch pin mode - If LED anode tied hi
            digitalWrite( PIN_LED, toggle );   // a lo will turn on

            nCount--;
           }, durationBlink);
      
        console.log( "L87   TERMINATING Test" );
        }, timeout)

        // if
        }

    console.log( "L93  time: " + getTime() );
    }, delay);

// function
}
  

startTest();
  


// Simple watchdog in case our test loop above runs amuck
setTimeout(function () {    
   console.log( "L106  WatchDog  TERMINATING   should never get here though" );
   ci();
   cb();
}, ( (durationTest*1000) + 2000 ) );

 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v04 (c) 2019 G.Williams
>
L93  time: 946685464.98464584350
L93  time: 946685465.58461284637
L93  time: 946685466.18463134765
L60     Sending WRITE command to device
L93  time: 946685466.78632259368
L93  time: 946685467.38473415374
L93  time: 946685467.98462772369
L93  time: 946685468.58465099334
L93  time: 946685469.18467044830
L93  time: 946685469.78472423553
L67     Sending READ command to device
L78  State LED: on
L78  State LED: off
L78  State LED: on
L78  State LED: off
L78  State LED: on
L78  State LED: off
L93  time: 946685470.98464107513
L93  time: 946685471.58464050292
L93  time: 946685472.18469142913
L93  time: 946685472.78465366363
L93  time: 946685473.38461399078
L93  time: 946685473.98462963104
L93  time: 946685474.58469295501
L87     TERMINATING   Test
> 

More Info:

https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Asynchronous/Timeouts_and_intervals#setinterval

[espruino-discuss]

Posted at 2021-04-04 by @MaBecker

@psc1988 have o look at this led sample

https://www.espruino.com/Flashing+Lights

it is also possible to use toggle()

https://www.espruino.com/Reference#l_Pin_toggle

there are more samples in the forum - use seach in section conversation.