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thank you

@allObjects could you drop some link about it?

So you would expect it to work only if WebIDE is connected to the
device? This is just for prototyping and debugging?

Yes, when I do something in JavaScript, I often check if this code is working also on Espruino ;)

@allObjects yes this is what I am looking for

Hi, I appreciate some information how to get prompt window when working with espruino by the console.
In JS is possible to write some input using prompt, would like to use it in espruino too.

hi @MaBe I use Pico this time

hi, I want to write code for analogReads sampling, in C i use for loop, I want to make let say 50-100 reads before I print them to console or to display, then can make analogRead a bit more precise as the readings floats a bit when use just simple analogRead function and timer Interval,
I appreciate some advice in this case

I still have same error in console, even after sucessful firmware upgrade by ./wiflash

Uncaught ReferenceError: "Graphics" is not defined
 at line 1 col 20
k(c);var g=Graphics.createArrayBuffer(128,f[4]+1,1,{vertical...
                   ^
in function "connect" called from line 1 col 40
var g = require("SSD1306").connect(I2C1);
                                       ^
=undefined

I've been trying to upload this code

pinMode(NodeMCU.D3,'input_pullup');
pinMode(NodeMCU.D4,'input_pullup');

function draw(){
  g.clear();
  g.drawString("Hello World",0,0);
  g.flip();
}
I2C1.setup({scl:NodeMCU.D4,sda:NodeMCU.D3});
var g = require("SSD1306").connect(I2C1);

I deal with another NodeMcu, before I tried with Lolin board and now with CP2101 chip, but still can't connect OLED

thank you @Wilberforce it works on esp-12E,
but can't run it on NodeMCU Lolin

hi, had anyone some issue with nodeMcu Lolin with CH340G to make it work generally on mac?
when I plug it into usb port it will restart my mac,
however on PC it is working eg. with arduinoIDE,
in Espruino case, when I use PC it flash code for Espruino firmware for ESP8266 but wifi upload not work, not sure what's wrong because when I connect another no nodeMcu Esp8266-12E board it works fine, I can flash Espruino firmaware by usb and upload code by wifi,
it could be problem whith this board? (this board works with OTA arduino)

I can't upload new firmware by

./wiflash 192.168.1.9 espruino_esp8266_user1.bin espruino_esp8266_user2.bin

I've got terminal error

Error retrieving http://192.168.1.9/flash/next

i have that error in console when use last @Ducky code

Uncaught ReferenceError: "Graphics" is not defined
 at line 1 col 20
k(c);var g=Graphics.createArrayBuffer(128,f[4]+1,1,{vertical...
                   ^
in function "connect" called from line 1 col 40
var g = require("SSD1306").connect(I2C1);
                                       ^
=undefined

how can I fix it?

hi, did anyone solve how to connect OLED into ESP8266 on Espruino?

@DrAzzy ,what is the proper code form to stop interval that way you said?
I tried

clearInterval(){1}

and it works when I typed it into console,
but when I placed that form into my code into if statement
WebIDE shows errors,
I used then clearInterval(1); instead but it isn't work

found another issue,
if I want to just read analog values there clearInterval is ok, but if I want to measure something continuously, like time, stopwatch etc. then every time I swap between my screens I clear interval and will stop time or stopwatch which I don't want,
any solution?
or maybe there is some already written stopwatch code here?

yes, I found it myself Gordon ;) just wanted to post I found solution ;)
my code looks now that, and is working now ;)

function OLED(){
clearWatch();

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

pinMode(B15, 'input_pulldown');

//Button tests
var BTN22 = B15;
var screen = 0;
var battery; // = analogRead(A5)*2*3.3;
var analogSample;

function screens(){
  g.clear();
  g.setFontVector(15);
  g.drawString("one",25,20);
  g.flip();
}

function screens2(){
  analogSample = analogRead(A2);
 g.clear();
 g.setFontVector(15);
 g.drawString("OLED OFF?");
 g.setFontVector(10);
 g.drawString(analogSample,60,50);
 g.flip();
}

function screens3(){
  battery = analogRead(A5);
 g.clear();
 g.setFontVector(20);
 g.drawString("" + battery.toFixed(2),20,20);
 g.flip();
}


setWatch(function(e) {
    screen++;
    console.log(screen);
    clearInterval();
    if(screen === 0) screens();
  if(screen === 1) setInterval(screens2,200);
  if(screen === 2) setInterval(screens3,500);
  if(screen >= 2) screen = 0;

  
},BTN22, {repeat: true, edge: 'rising', debounce:150});

}
           
OLED();

I have version 1v85 and it isn't work, I have that error I described above

Could anyone help to solve an issue with my code?
I have 3 screens, first screen "one" on the beginning, then second screen "OLED OFF?" and third "analogRead(A5)"
until I change screens by button (setWatch) and have no intervals set then it works really well, no lags, but when I want to update this analogRead(A5) informations every 500ms then I noticed that I can't switch to the other screen just by one push of the button, sometimes I need several or dozen push to do it, when I don't use intervals it works again,
what should I change to be able to have few screens where I can watch on different analog values updated every 500-1000ms?

function OLED(){
clearWatch();

I2C1.setup({scl:B6,sda:B7});
var g = require("SSD1306").connect(I2C1);
g.clear();
  g.flip();
  
pinMode(B14, 'input_pulldown');

var BTN22 = B15;
var screen = 0;
var battery = analogRead(A5)*2*3.3;

function screens(){
  g.clear();
  g.setFontVector(15);
  g.drawString("one",25,20);
  g.flip();
}

function screens2(){
 g.clear();
 g.setFontVector(15);
 g.drawString("OLED OFF?");g.flip();
}

function screens3(){
  battery = analogRead(A5);
 g.clear();
 g.setFontVector(20);
 g.drawString("" + battery.toFixed(2),20,20);
 g.flip();
}


setWatch(function(e) {
  clearInterval();
    screen++;
    console.log(screen);
    if(screen === 0) screens();
  if(screen === 1) screens2();
  if(screen === 2) screens3();setIterval(screens3,500);
  if(screen >= 2) screen = 0;
},BTN22, {repeat: true, edge: 'rising', debounce:150});

           
OLED();

@MaBe I see that dots sometimes, usually on the beginning, when I upload new code first, then when I upload it again I see on the display what I wanted,
and also when I wake up the display I see something like a flash with dots in some parts of the display for a short time, and after details I wanted, I use graphic library from Espruino example http://www.espruino.com/Graphics
Could it be something with unstable current? wiring? what you think?

MaBe your way is working for me too ;)
thank you

DrAzzy, I still learn javascript code proper form ;)

this is the code

    function i2c1(c){I2C1.writeTo(0x3C, [0,c]);}
        function dispoff(){i2c1(0xae);}
        function dispon(){i2c1(0xaf);}

function OLED(){
pinMode(A7,'output');
digitalWrite(A7,1);

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

  g.setFontVector(15);
  g.drawString("OLED",25,20);
  g.flip();

}
           
OLED();

but this only change the position of string displayed on the OLED,
when I type 'i2c1(dispoff)' or 'i2c1(dispon)'

thank you, now it works, no lags,
I'll start new posts in similar case again

I tried this but won't work in my case, possibly code from is wrong?

function i2c(c){i2c.writeTo(0x3C, [0,c]);}
    function dispoff(){i2c(0xae);}
    function dispon(){i2c(0xaf);}

it just prints 'screen' value in console,
values are from 0 up to 2,
those values correspond to details I see on the OLED display (from functions screens(), screens2() and screens3()

If (screen === 2) and I press BTN11 then my OLED is switched off by disconnecting the VCC line, when I press BTN11 again VCC line is again connected into display and OLED() function starts. The same time I have console.log with value of 'screen'.
When I do this sequence (screen ===2) and BTN11 press again, every time I see more console.logs in WebIDE console window, and program start to slow down, wait for all logs and then react for my button presses, after a while it stock

This is the code I use when Espruino stop working.
There is some error as console log after first "wake up" print console value twice, then every next wake up it increase the number of console.log prints

function OLED(){
pinMode(A7,'output'); //A7 Mosfet Gate PIN for OLED
digitalWrite(A7,1);

I2C1.setup({scl:B6,sda:B7});
var g = require("SSD1306").connect(I2C1);
g.clear();
  g.flip();
  
pinMode(B14, 'input_pulldown');
pinMode(B15, 'input_pulldown');

//variables
var BTN22 = B15;
var BTN11 = B14;
var screen = 0;
var battery = analogRead(A0)*2*3.3;
var i = true;

function screens(){
  g.clear();
  g.setFontVector(15);
  g.drawString("MOTOR ON",20,20);g.flip();
}

function screens2(){
 g.clear();
 g.setFontVector(15);
 g.drawString("OLED OFF?");g.flip();
}

function screens3(){
 g.clear();
 g.setFontVector(20);
 g.drawString("" + battery.toFixed(2));
 g.flip();
}

  
setWatch(function(e) {
  if(screen === 0) screens();
  if(screen === 1) screens2();
  if(screen === 2) screens3();
    screen++;
    console.log(screen);  
  if(screen > 2) screen = 0;
},BTN22, {repeat: true, edge: 'rising', debounce:150});

  
setWatch(function(e) {
   i = !i;
 if(screen === 0) OLED();
 if(screen === 2) digitalWrite(A7,i); screen =0;
   console.log(screen);  
},BTN11, {repeat: true, edge: 'rising', debounce:150});

  screens();
}
OLED();

about reset
do you mean about this pin?