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hi, I wonder how to write some switch off/on function on my Espruino,
I use OLED ssd1306 and ADS1115 for low voltage readings and display them into OLED,
would like to switch off my Espruino for battery saving when I don't use it,
I know I can write some clear() function for OLED when I press button and send some low voltage for ADS vcc pin but maybe there is some simple solution?
is there any function I can use?

yes, I did, I can upload standard olimexino_stm32 but my mini then have some mess with pinout, pins are not the same as on the rev3+ maple, rev3+ maple works fine but not mini

could anyone explain how to load Espruino into mini as user51876 did?

Oli and Gordon, the way your wrote isn't working, OLED doesn't start after reset,
but MaBe advice looks like good one, OLED and all code is starting after reset, but EspruinoIDE return some error in console

>echo(0);
Erasing Flash.....
Writing.........
Compressed 81600 bytes to 6195
Checking...
Done!
Uncaught ReferenceError: "o" is not defined
 at line 1 col 1
o(1);
^

btw. is this save operation store some data on the MCU every save I make? I mean should I flash espruino to save space on the mcu or during save oparation it will erase all old data and replace them with new one?

is it possible to make for loop with some delay? I want to make an average sum for first few readings from ADS but for loop without delay between following readings pico return only 0 value,
when with the same code but analogRead function instead of ads read it works fine, maybe ADS need some time to send another value and for loop in espruino is to fast? some debounce kind operation is necessary?

hi, I play now a couple hours with save and onInit function and can't run my program when my pico is starting after reset (unplug from usb), is there any simple explanation?
here is the code

function oled(){
 
         g.clear();
         g.setFontVector(28);
         g.drawString("FIRST",0,12);  
         g.flip();
  
  setTimeout(function(){
    nextOne();
    setTimeout(function(){clear();},3000);
    setTimeout(function(){setInterval(data,1000);},3200);
  },2000); 
}

function nextOne(){
    g.clear();
    g.drawString("NEXT",0,12);
    g.flip();
}

function clear(){ g.clear();g.flip(); }

function data() {
  var bat = analogRead(A5);
  g.clear();
  g.drawString(bat.toFixed(2) + "v",0,0);
  g.flip();
}

function onInit(){
setTimeout(function(){
  oled();
  },2000); 
 // onInit();
}

onInit();

I2C2.setup({scl:B10,sda:B3});
var g = require("SSD1306").connect(I2C2);
  
E.on('init', function() { onInit();  });

can't find command for screen rotation in ssd1306 graphic library, is there any?

thank you, got my code construction and can deal with my data ;)

in my case ILI9341 is working but on the original Espruino board is pretty fast, and on the pico very slow, I mean about demonstration code form espruino.com, it slower than avr, much slower,
what could be a reason?

thank you Gordon, it is working now, espruino is reading all channels and gain is working as well,
I can now move on and try to finish my project ;)

do you know the way how to create new var value which will get readings from this ADS function?

ads.getADC(0, function(val0) {});

I have to do plenty of mathematical operations with my variable on few channels, it would be much simpler to use eg. var inputOne instead of this function above,
actually I can't print val0 outside the function, and I need to use readings from ADS in few steps, make a math and then print it,
I appreciate help in this case

I didn't get readings of all sensors I connected, just first one, but I connected 3 of them,
it might be typeof 0 issue you wrote, but I don't know how to deal with this?

any updates about new version of espruino software? or ads1115 error fix?

I still use 1v81 , now used this code

    var CONFIG = {
    OS_MASK      : (0x8000),
    OS_SINGLE    : (0x8000),  // Write: Set to start a single-conversion
    OS_BUSY      : (0x0000),  // Read: Bit = 0 when conversion is in progress
    OS_NOTBUSY   : (0x8000),  // Read: Bit = 1 when device is not performing a conversion
                
    MUX_MASK     : (0x7000),
    MUX_DIFF_0_1 : (0x0000),  // Differential P = AIN0, N = AIN1 (default)
    MUX_DIFF_0_3 : (0x1000),  // Differential P = AIN0, N = AIN3
    MUX_DIFF_1_3 : (0x2000),  // Differential P = AIN1, N = AIN3
    MUX_DIFF_2_3 : (0x3000),  // Differential P = AIN2, N = AIN3
    MUX_SINGLE_0 : (0x4000),  // Single-ended AIN0
    MUX_SINGLE_1 : (0x5000),  // Single-ended AIN1
    MUX_SINGLE_2 : (0x6000),  // Single-ended AIN2
    MUX_SINGLE_3 : (0x7000),  // Single-ended AIN3
                
    PGA_MASK     : (0x0E00),
    PGA_6_144V   : (0x0000),  // +/-6.144V range = Gain 2/3
    PGA_4_096V   : (0x0200),  // +/-4.096V range = Gain 1
    PGA_2_048V   : (0x0400),  // +/-2.048V range = Gain 2 (default)
    PGA_1_024V   : (0x0600),  // +/-1.024V range = Gain 4
    PGA_0_512V   : (0x0800),  // +/-0.512V range = Gain 8
    PGA_0_256V   : (0x0A00),  // +/-0.256V range = Gain 16
                
    MODE_MASK    : (0x0100),
    MODE_CONTIN  : (0x0000),  // Continuous conversion mode
    MODE_SINGLE  : (0x0100),  // Power-down single-shot mode (default)
              
    DR_MASK      : (0x00E0),  
    DR_128SPS    : (0x0000),  // 128 samples per second
    DR_250SPS    : (0x0020),  // 250 samples per second
    DR_490SPS    : (0x0040),  // 490 samples per second
    DR_920SPS    : (0x0060),  // 920 samples per second
    DR_1600SPS   : (0x0080),  // 1600 samples per second (default)
    DR_2400SPS   : (0x00A0),  // 2400 samples per second
    DR_3300SPS   : (0x00C0),  // 3300 samples per second
             
    CMODE_MASK   : (0x0010),
    CMODE_TRAD   : (0x0000),  // Traditional comparator with hysteresis (default)
    CMODE_WINDOW : (0x0010),  // Window comparator
              
    CPOL_MASK    : (0x0008),
    CPOL_ACTVLOW : (0x0000),  // ALERT/RDY pin is low when active (default)
    CPOL_ACTVHI  : (0x0008),  // ALERT/RDY pin is high when active
            
    CLAT_MASK    : (0x0004),  // Determines if ALERT/RDY pin latches once asserted
    CLAT_NONLAT  : (0x0000),  // Non-latching comparator (default)
    CLAT_LATCH   : (0x0004),  // Latching comparator
               
    CQUE_MASK    : (0x0003),
    CQUE_1CONV   : (0x0000),  // Assert ALERT/RDY after one conversions
    CQUE_2CONV   : (0x0001),  // Assert ALERT/RDY after two conversions
    CQUE_4CONV   : (0x0002),  // Assert ALERT/RDY after four conversions
    CQUE_NONE    : (0x0003),  // Disable the comparator and put ALERT/RDY in high state (default)
    };
    var GAINS = {
      6144 : CONFIG.PGA_6_144V,  // +/-6.144V range = Gain 2/3
      4096 : CONFIG.PGA_4_096V,  // +/-4.096V range = Gain 1
      2048 : CONFIG.PGA_2_048V,  // +/-2.048V range = Gain 2 (default)
      1024 : CONFIG.PGA_1_024V,  // +/-1.024V range = Gain 4
      512 : CONFIG.PGA_0_512V,  // +/-0.512V range = Gain 8
      256 : CONFIG.PGA_0_256V,  // +/-0.256V range = Gain 16;
    };
    var REG = {
      MASK : 3,
      CONVERT : 0,
      CONFIG : 1,
      LOWTHRESH : 2,
      HITHRESH : 3
    };
    function ADS1X15(i2c) {
      this.i2c = i2c;
      this.addr = 0x48;
      this.gain = 0;
    }
    ADS1X15.prototype.writeRegister = function(reg, value) {
      this.i2c.writeTo(this.addr, reg, value>>8, value);  
    };
    ADS1X15.prototype.readRegister = function(reg) {
      this.i2c.writeTo(this.addr, reg);  
      var d = this.i2c.readFrom(this.addr, 2);
      return (d[0] << 8) | d[1];  
    };
    /// set the gain, with a value in mv (6144, 4096, 2048, 1024, 512 or 256). The value is the full swing, so 256 = +/- 0.256v
    ADS1X15.prototype.setGain = function(gain) {
      if (!(gain in GAINS)) throw new Error("Gain "+gain+" not found");
      this.gain = gain;
    };
    ADS1X15.prototype.getADC = function(channel, callback) {
      var config = CONFIG.CQUE_NONE    | // Disable the comparator (default val)
                        CONFIG.CLAT_NONLAT  | // Non-latching (default val)
                        CONFIG.CPOL_ACTVLOW | // Alert/Rdy active low   (default val)
                        CONFIG.CMODE_TRAD   | // Traditional comparator (default val)
                        CONFIG.DR_1600SPS   | // 1600 samples per second (default)
                        CONFIG.MODE_SINGLE;   // Single-shot mode (default)
      // Set PGA/voltage range
      config |= this.gain;
      // Set single-ended input channel
      config |= [CONFIG.MUX_SINGLE_0,CONFIG.MUX_SINGLE_1,CONFIG.MUX_SINGLE_2,CONFIG.MUX_SINGLE_3][channel];
      // Set 'start single-conversion' bit
      config |= CONFIG.OS_SINGLE;
      // Write config register to the ADC
      this.writeRegister(REG.CONFIG, config);
      // Wait for the conversion to complete
      var ads = this;
      setTimeout(function() {
        // Read the conversion results
        // Shift 12-bit results right 4 bits for the ADS1015
        callback(ads.readRegister(REG.CONVERT)); 
      }, 8);
    };
    // then try with
    I2C1.setup({ scl : B6, sda: B7} );
    var ads = new ADS1X15(I2C1);
      ads.setGain(512); // +/- 0.256mV


    function everySecond() {
     ads.getADC(0, function(val0) {
      ads.getADC(1, function(val1) {
       ads.getADC(2, function(val2) {
        ads.getADC(3, function(val3) {
         console.log(val0,val1,val2,val3);
        });
       });
      });
     });
    }
    setInterval(everySecond, 1000);

and ADS shows me only one channel value, I've connected 3 voltage sources into it,

|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v81 Copyright 2015 G.Williams
>echo(0);
=undefined
4531 75 79 78
4533 74 79 78
4580 75 79 77
4527 75 78 78
4622 75 79 78

I checked 3 other ADS, they are working on arduino, but here I get only one value,
could anyone help to fix it? please

also I am not sure about gain settings,
seems they have some error too, as eg. 256 gain shows lower value than 2048?

not sure, but before I updated WebIDE code works fine, could that be a problem? any chance do return to earlier version of WebIDE?

yes, value are not reliable, maybe I better connect it into ADS1115 and get Co2 value by that amp?
as have no idea how to set it for proper analog readings, multimeter is stable with readings, espruino not

Gordon, I'll checked that, values are still floating :(
maybe is possible to use average example code you wrote, and set something like permanent refresh of function which will count analog Value again and again from the start?
average function was very accurate on the beginning but not after a while, maybe is should reset old value and start with new one every let say 1000 ms?

median filter from the code above Gordon is returning 0 value, could you fix it?
average way isn't correct after while, on the beginning values are corresponding to multimeter but after few minutes average isn't change as fast an as accurate as value on the multimeter

average filter could be quite good if it could reset every some cycle of time and take fresh reading values for count

allObjects: your code is working but after setTimeout time I see both "waiting" and "CO2 measured..." commands - would like to leave only readings after 5min

hi lads, I thought to use 2 espruinos at both sides and some communication between them,
esp8266 looks interesting or no microcontroller way but firstly I want something simple and reliable, and range would be max 1.5km

looks very interesting, I would like to send from one espruino pwm signal to drive motor at other side (up to 1.5km away), trigger function would be necessary as if I push trigger harder would like to get faster speed of the motor and decrease it when trigger has low tension or switch off when the trigger is released

hi, I wonder what type of wireless communication would be optimal for sending and receiving data between two espruinos? I thought about 1-1,5km distance.
bluetooth and wifi working range would be to short? any ideas?

median filter looks better for my purposes, I’ll check that today, thanks Gordon

thank you will check that later on,
have another problem with this sensor,
when I connect it into multimeter it shows quite stable measurements,
when I blow on the sensor volts value is changing quite fluent,
but when I use espruino with analogRead function for this, and convert it into volts,
then my measurements are not stable, and are changing more than a little,
is any way to stabilize it?

hi, haven't use yet Espruino timers, would like to make some command on the beginning for 5minutes and then read and print values from MG-811 sensor,
I want print "wait" on the console or display and when 5minutes times from the start will finish I want to Espruino start read the values from sensor and print these values instead of wait word
could someone help me with this?

now I fixed timeouts, added 4,7k resistors from sda and scl to vdd, but can't see nothing on the screen, but Arduino code works and run display,

fixed ;)
usb socket cable wasn't keep pico strong enough to establish good connection

Hi, I've used code to run ssd1306 display from Espruino Web but it has some error
code I used

function start(){
 // write some text
 g.drawString("Hello World!",2,2);
 // write to the screen
 g.flip(); 
}

// I2C
I2C1.setup({scl:B6,sda:B7});
var g = require("SSD1306").connect(I2C1, start);

error I've got

>echo(0);
Uncaught InternalError: Timeout on I2C Write BUSY
 at line 1 col 19
{b.writeTo(d,[0,a])}
                  ^
in function called from line 1 col 147
...tion(a){b.writeTo(d,[0,a])});void 0!==c&&setTimeout(c,100);g...
                              ^
in function "connect" called from line 1 col 47
var g = require("SSD1306").connect(I2C1, start);
                                              ^
=undefined
>

anyone knows how to fix it?