How to extend the Ubuntu guest OS’s hard disk for VirtualBox on Mac Steps: resize the VDI file on Mac OS: How to Resize a VirtualBox VDI or VHD File on Mac OS X boot the Ubuntu with the image(ISO) and Gparted(resize the partition). Note: firstly resize the extension partition (/dev/sda2), then resize the partition (/dev/sda5) Ubuntu VM in VirtualBox: How to increase the size of a disk and make small(er) exports for distribution reboot the ubuntu with local vdi file and check the result.

[ESP32_lvgl] From demo to own UI component with lvgl on ESP32 This is the FIRST blog for denoting my learning process of lvgl on platform of ESP-IDF for chip ESP32. After a lot of experinment, I gues ESP-IDF should be the best sdk that suit for ESP32 lvgl development. Rather than the toy – micropython. 1. Motivation and value of this post After configuring the ESP32 LVGL development environment, developer will try to run demo on the development board. But for beginners, from running demo to developing the specific project, they may meet some little but not-easy-to-solve difficalties.

[ESP32_lvgl]Use LVGL with Micropython for ESP32 devBoard Table of contents: [TOC] Table of contents: 1 Some basic concepts 2 The one: lv_micropython 3 Quick use of lv_micropython 3.1 Build micropython for Linux port (optional for newbie): 3.2 Building lv_micropython micropython fork for ESP32 port: [3.2.1 install the ESP-IDF sdk](#321-install-the-esp-idf-sdk) [Get ESP-IDF v4.2](#get-esp-idf-v42) [Set up the environment variables](#set-up-the-environment-variables) [3.2.2 Build the `lv_micropython` firmware](#322-build-the-lvmicropython-firmware) [3.2.3 Flashing the `lv_micropython` firmware](#323-flashing-the-lvmicropython-firmware) [3.2.4 Getting a Python prompt on the device](#324-getting-a-python-prompt-on-the-device) 4 Confiture wifi and use the board Reference and read more

Getting started with MicroPython with NodeMCU(ESP8266) board 1. Follow the official tutorial to flash the MicroPython firmware Link: https://docs.micropython.org/en/latest/esp8266/quickref.html https://docs.micropython.org/en/latest/esp8266/tutorial/intro.html#intro Comands you may need: $ esptool.py --port /dev/tty.usbserial-14120 erase_flash $ esptool.py --port /dev/tty.usbserial-14120 --baud 460800 write_flash --flash_size=detect -fm dout 0 esp8266-20210902-v1.17.bin you’ll receive message from ESP8266 on serial monitor such as puTTy: microPython v1.17 on 2021-09-02; ESP module with ESP8266 Type "help()" for more information. micropython script can be run in the REPL shell. The Adafruit ampy tool gives you more function and recommended to use it.

Tips for getting started with lvgl project on ESP32 Before you get started with lvgl on ESP32, the first problem is which SDK(firmware platform) is going to be based on. You may dev ESP32 project based on Arduino or ESP-IDF(espreessif officially offered). There are two pathes at least to implement ESP32 project. By the way, the esp32_library for arduino can be used as a submoduel(component) of ESP-IDF SDK. path1: ESP-IDF: Develop ESP32 lvgl project with vsCode, platformIO and ESP-IDF before start, you need to know how to implement a “Hello world” or “LED blinking” project using the vsCode+platformIO+ESP_IDF

Start a lvgl project on ESP32 with vsCode, platformIO on Arduino platform WARING : The version confilict problem may crazy you if you play lvgl on Arduino platform. Fortunately, this post offers you one solution for version_conflict problem. This is the sister post for ‘Complile the lvgl sample proj in vsCode with ESP-IDF extension’. The difference is the dev-kit based on Arduino vs ESP-IDF. Here, we use Arduino + platformIO in vsCode for developing ESP32 SoC project with lvgl GUI.

Complile the lvgl sample project in visual studio Code (vsCode) with help of ESP-IDF extension If you’ve go through esp-idf vscode extension installation, esp-idf blink example, just skip the section 1 and section 2. Directly check the lvgl example project lv_port_esp32 cloning/configure/build/etc. steps in section 3. Implement a “Hello world” or “LED blinking” project using the vsCode+platformIO+ESP_IDF Prerequisit: Go through the official “get started with ESP-IDF” tutorial (highly recomemded, link) section 1. install the esp-idf vscode extension Note: if you have go through the official “get started with ESP-IDF” tutorial (highly recomemded, link), you can specify the path of ESP-IDF code and tools when install the ESP-IDF vscode extension.

Node.js realtime communication with NodeMCU with socket.io Reference: https://salfade.com/tutorials/realtime-communication-with-nodemcu-with-socketio Goal of this post Establish a real-time communication between a server and the NodeMCU, this can be really useful like a situation where the server has to notify the client asynchronously, Let’s get started with the back-end We are going to use a Node server, where we can integrate Socket.io init. Install Node.js if you haven’t it yet. In node, we ‘ll be using the framework called express to deal with the communication with HTTP requests.

Attiny85 Arduino SleepMode 睡眠模式使用笔记 Attiny 85 board: 这款迷你开发板带了6个IO口，4个ADC，I2C通信结构等资源，已经能应付很多控制场景了。 使用VScode + platformIO ， 在Arduino框架下进行开发。睡眠模式探究

First, PIP 1, add a source For example, add SJTU Source https://mirror.sjtu.edu.cn/pypi/web/simple： pip config set global.index-url https://mirror.sjtu.edu.cn/pypi/web/simple If SET has multiple times, it seems to be only saved the mirror source of the last set. 2, delete the source pip config unset global.index-url 3, check which source now pip config list Second, Conda 1, add a source For example, Tsinghua Source: conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/ conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/ conda config --set show_channel_urls yes SJTU: conda config --add channels https://mirror.