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backup  -> esptool --baud 115200 --port COM3 read_flash 0x0 0x400000 antrian_printer.wifi.bin

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How to create Telegram Bot and send messages to your group

1. Create Telegram bot:

   Search for user @BotFather in Telegram app. Type /help in BotFather chat and wait for the reply. Type in the chat:

   /newbot

or select /newbot command from Help text. Answer few setup questions:

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http://bit.ly/driverCD

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As GraalVM still does not support creation of executable files for Windows, it was decided to take advantage of other capabilities offered by the Java ecosystem, specifically, creation of a minimalized JRE version.

In order to create the minimized JRE version, first it is needed to know the dependencies on certain packages that will be included in the JRE.

First of all, it is necessary to create the “fat jar” file with all dependencies.

Then run the jdeps -s <path to jar file> command to get a list of all dependencies. For example:

jdeps -s application.jar
application.jar -> java.base

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{
    // Based on: https://gist.github.com/pakLebah/dab98067e9a388a3a8d2f5c0b44a7d3f#file-tasks-json
    "version": "2.0.0",
    "options": {
        "cwd": "${workspaceFolder}",
        "env": {
            // task settings for files and folders, use full path for commands
            "FPC_COMMAND": "fpc",
            "PROJECTFILE": "${relativeFile}",
            "PROJECTBASE": "${fileBasenameNoExtension}",

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avrdude for windows -> https://github.com/mariusgreuel/avrdude

avrdude -p atmega328p -c arduino -P com4 -U flash:w:board.hex:i


Change :r: to :w: and you can write the hex file back into the flash of the Arduino. Or upload it to another board.


Uploading Arduino HEX files -> https://www.hobbytronics.co.uk/arduino-xloader

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Using MSYS2 with Visual Studio Code is extremely easy now thanks to the Shell Launcher extension by Tyriar.

First, install the extension and reload Visual Studio Code.

Then, open the settings.json to edit your settings.

Add the field shellLauncher.shells.windows. I recommend using autocompletion here so that all the default shells are added.

You should having something like this now:

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Go development environment on Windows with MSYS2

Normally, it is sufficient to grab the Go MSI installer from the website in order to set up the toolchain. However, some packages that provide Go wrappers for C libraries rely on cgo tool, which in turn, needs the GCC toolchain in order to build the glue code. Also, 3rd-party dependencies are usually hosted on services like GitHub, thus Git is also needed. This mini-guide illustrates how to setup a convenient development environment on Windows using MSYS2.

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Go development environment on Windows with MSYS2

Normally, it is sufficient to grab the Go MSI installer from the website in order to set up the toolchain. However, some packages that provide Go wrappers for C libraries rely on cgo tool, which in turn, needs the GCC toolchain in order to build the glue code. Also, 3rd-party dependencies are usually hosted on services like GitHub, thus Git is also needed. This mini-guide illustrates how to setup a convenient development environment on Windows using MSYS2.

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/**************************************/
/*      https://myhomethings.eu       */
/*                                    */
/**************************************/

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);   // I2C address: "0x3F" or "0x27"

const byte upButtonPin = 4;