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I've just unsolder the battery but still can't reset or flash Pico, no com port visible
...after a while
com port is visible,
I don't understand what happen?
I didn't change nothing in hardware, what might be wrong,
I am afraid about reliability of it, as when I use it for some project,
solder the battery, add some programming connection don't want
to take it apart but just program it.
Any advice how to make Pico stable?
...again
same story, no com port visible,
It is really very hard to finish programming with this effort

Is any chance to reset it other way?
My Pico stock 3rd time I uploaded the code, before I unsoldered other parts and fixed it,
now I realized that it must be something different than my quality soldering as I uploaded code over 20 times with no problem, I didn't change nothing in hardware and now Pico stoped.
I have soldered there 3.7lion battery already, don't want to unsolder it 4th time.
Is any way to reset Pico by hardware (this way with push button not working)?
Or I have to wait till battery will be empty enough to stop Pico?

I have I2C OLED

I fixed it, before I soldered 4 usb wires into usb plug on Pico and after some time it stop working (bad wiring) and when I cleaned it port com wasn't recognized until I cleaned plug more.

Hi, today plenty of times I uploaded code into my Pico and it stock,
I wanted to flash it but now I can't see the com port, when I pressed the button I see two LEDS on, stable not dimming.
How Can I fix it?

could you help with proper form for this command?
cmd(0xae); isn't work when I tape it in Espruino Web IDE console,
is there any example how to use commands in this case?

Tnx Lads, Gordon do you know the command for SSD1306 to switch it off and on again?
would that be for OFF 0xae and for ON 0xaf ?
should I use it in that form you made it in your watch code like that "cmd(0xaf);" ?

Hi, I just want to ask about proper connection for Pico with OLED SSD1306 and Mosfet in VCC line for OLED.
I want to save more current on the battery, yesterday I left OLED connected to PICO and li-po battery, OLED was cleared, and today battery is empty, thought to use Mosfet to steering VCC supply line for OLED, but what I noticed is when I put (in my case B4) gate pin to 0 (digitalWrite(B4,0)) 0r (analogWrite(B4,0)) then my OLED still works. Screen isn't blank.

any advice how to switch this Mosfet off to cut off current for OLED?
I use IRFZ44N Mosfet

fortunately Pico is alive when I did short it out ;)
and have original Espruino board for next tests
I ordered diode, thank you.

Hi today I burned one thing on the Pico, can I replace it?
https://flic.kr/p/DzaUeU

Before I thought to use charger and next read about FET on Pico, I tested it yesterday and It looks like I espruino can "protect" the battery by software, but I'll follow your recommendations
thank you,

Thanks Gordon,

and what do you think about charging battery from Pico? I thought to use voltage divider and then connect it to analog pin to read it and "stop" fet from charging by software,
would my code be ok for this?

function stop(){
  digitalWrite(B0,1);
}

function charge(){
  digitalWrite(B0,0);
}

function check(){
 var a = analogRead(A5)*E.getAnalogVRef()*2;
  console.log(a);
  if(a>3.7) stop();
  else if(a<3.71) charge();
}

Hi, I would like to connect Espruino Pico permanently with battery in my project.
I thought to do it like that:
BAT >> CHARGING BOARD >> Pico
would like to charge it by this module, but
I am not sure I need to install some switch there when I want to programming it by USB?
should I disconnect battery circuit from espruino when I program it or I can leave it?
I already linked FET/B0, not sure I did right

I would like to make some circuit which let me programming pico by USB, use battery for powering pico when not connected to USB and charge battery by this module,
I had read in one of posts on the forum that FET can overcharge battery when USB is connected, is it ?

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battery module

thank you, I wrote that informations from espruino.com already ;)

I use Android phone, however don't know how to change this code you link posted, is any simple example how to send data from Espruino?

Hi, is it possible to send some data by Espruino and HC-05 module eg. into mobile?
there is plenty apps that use bluetooth data, I would like to use it for variometer apps,
need to send data from pressure sensor into it

thank you Gordon, will check it today later on with new firmware

yes, it stops after several dozen press of the button, then works again and next stops

any idea what can I do to get smooth change between screens?

I am afraid it's to hard for me at the moment, don't understand well this array construction

I checked that, even if I use internal BTN it still stop after several times, sometimes after tens of times, then works again, and stock, still same, maybe is something wrong in the construction of my code?

yes, numbers printed into console stop when I have the problem with the button

in my code button didn't react for every press I did, after 8-9 times it stock for a while, and working again and then stock next time, would like to make this screen change smooth, no lags

thank you for rotation tip,

since couple days I wonder how to write proper code to make something like display few screens on the ssd1306, let say 3 of them, and every screen will display different values, I made simple code where espruino count how many times I press the button, then depend of the number will change the screen display, but there is some issue, until I put on the display some value once (without setInterval ) then it works fluently, but when I put setInterval() function (for analog readings) I have some lag, and can't switch between screens smoothly
here is one of the codes I tried

I2C2.setup({scl:B10,sda:B3});
var g = require("SSD1306").connect(I2C2);

g.clear();
g.flip();


var S1,S2;
var BTN22 = B14;
var BTN11 = B15;
var screen = 0;

g.setFontVector(20);

pinMode(B14, 'input_pulldown');
pinMode(B15, 'input_pulldown');

function read(){
  g.clear();
  S1 = analogRead(A1);
  g.drawString("S1 " + S1.toFixed(3));
    g.flip();
}

function read2(){
    //clearInterval();
  g.clear();
  S2 = analogRead(A2);
  g.drawString("S2 " + S2.toFixed(3));
  g.flip();
}

function interval(){
  setInterval(read,500);
}

function interval2(){
  setInterval(read2,500);
}

function display(){
  if(screen === 1)interval();
  if(screen === 0)interval2();
  //console.log(screen);
}

setTimeout(function(){
  display();
},2000);

setWatch(function(e) {
  clearInterval();
  setTimeout(function(){
  display();
  console.log(screen);
  screen = screen + 1;
  if(screen > 1) screen = 0;
  },200);
},BTN11, {repeat: true, edge: 'rising', debounce:50});

where could be something wrong in my code?

i don't want to use mechanical switch, oled and pico would be in the housing, I thought to use some piezzo switch to "make it work or sleep", so I can't simply turn off the pico