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Member since Apr 2015 • Last active Sep 2018
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    I will try to clean the code, and trace the callĀ“s order, and come back again tomorrow. But basically the call to start is in the require(ssd1306) callback.

    Thanks for your help.

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    OK, i found it. This SSD1306 module, apparently, need at least 1.5 seconds to stabilize.

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    if I plug the USB, connect the IDE and execute "g = require("SSD1306").connect(i2c, start, { height : 32 });" from the console the display update all the information. Looking further to understand why...

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    Looking further, The problem apparently lies in the initialization of SSD1306.

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    This is the full code

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    After upload, did you a) run it and then save it? - or b) save it right away?
    I have tried both options.

    Save will after completion call onInit, can you verify that?
    Yes it does, in fact while connected it works very well. The problem happens when I connect it without a console, but in the code I do not have any call to write to the console.

    Compacting Flash...
    Calculating Size...
    Compressed 81600 bytes to 19967
    Running onInit()...

    if force the running mode with load(), works ok...

    Loading 20034 bytes from flash...
    Running onInit()...

    I 'm sure you already worked through the Troubleshooting section...
    Yes I did but without success.

    Thanks for your help.

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    I think a my be doing something wrong, when run the code from the IDE, everything runs fine. But, when i try to save the code, wrapping the initialization code in a function and calling it from the onInit function does not run unless I call it manually with load(). When I run manually load() everything runs fine too.

    The code is uggly, but it's working when i run it manually.

    //All VAR are declared globally
    function initializeall() {
      i2c = new I2C();
      i2c.setup({ scl : B6, sda: B7, bitrate: 1000000  });
      g = require("SSD1306").connect(i2c, start, { height : 32 });
      dht = require("DHT22").connect(B5);
      setWatch(selection, B15, { repeat: true, edge:'falling', debounce:20});
      setWatch(BtnUP, B14, { repeat: true, edge:'falling', debounce:20});
      setWatch(BtnDown, B13, { repeat: true, edge:'falling', debounce:20});
    function onInit() {
      setTimeout(function () {

    Does anyone has a hint?


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    Hi, there is any simple way to scroll text in a 32x8 Led Matrix with MAX7219 controller? Any help will be appreciated.

    Thanks and regards