Since the official NUS NextBus Android app requires Google Play services which my phone does not support. I wanted to develop a custom app for NUS NextBus. To do so, I need to be able to access the APIs used by NUS NextBus. A quick google search led to this reverse engineered API by SuibianP: However, I noticed that executing any of these requests would give a 401 Unauthorized error: It seems that SuibianP did not document how to make authorized requests here. Let's reveal how the NUS NextBus app does it by reverse-engineering the app ourselves. Since it is my first attemp to reverse-engineer an Android app, I did a quick search and found this wonderful article: Following that article, let's first get the package name of NUS NextBus by opening the app on my phone and runing the following command: > adb shell dumpsys activity recents | grep 'Recent #0' | cut -d= -f2 | sed 's| .*||' | cut -d '/' -f1 nus.ais.mobile.android.shuttlebus The next step is to get the apk path: > adb shell pm path nus.ais.mobile.android.shuttlebus package:/data/app/nus.ais.mobile.android.shuttlebus-gywHKqGywO_xoIevMtAYrA==/base.apk And then pull the apk to the computer: > adb pull /data/app/nus.ais.mobile.android.shuttlebus-gywHKqGywO_xoIevMtAYrA==/base.apk Let's decompile the apk with apktool: > apktool d base.apk We can now see a new folder under the current directory that holds the decompiled source. Let's view the source code using jadx: > jadx-gui base.apk After glancing through some of the code, I noticed that the Java source code does not seem to hold any logic. I also found that there are imports of the…

Introduction The official NuttX documentation seems to be incomplete. Therefore I listed here the steps I did to get NuttX working under Ubuntu 18.04. Prerequisites sudo apt install \ bison flex gettext texinfo libncurses5-dev libncursesw5-dev \ gperf automake libtool pkg-config build-essential gperf genromfs \ libgmp-dev libmpc-dev libmpfr-dev libisl-dev binutils-dev libelf-dev \ libexpat-dev gcc-multilib g++-multilib picocom u-boot-tools util-linux KConfig frontend Clone the tools repository: git clone https://bitbucket.org/nuttx/tools.git Build KConfig frontend: cd tools/kconfig-frontends ./configure --enable-mconf --disable-nconf --disable-gconf --disable-qconf make sudo make install sudo echo 'include /usr/local/lib' >> /etc/ld.so.conf sudo ldconfig Toolchain Follow the first 4 steps in https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/ Then, run the following to add ESP32 toolchain to PATH get_idf Get NuttX mkdir nuttx cd nuttx git clone https://github.com/apache/incubator-nuttx.git nuttx git clone https://github.com/apache/incubator-nuttx-apps apps Initialize Configuration List pre-existing configurations: ./tools/configure.sh -L | less Choose a configuration: ./tools/configure.sh -l esp32-devkitc:nsh make menuconfig Build NuttX make Flash to ESP32 esptool.py --chip esp32 elf2image --flash_mode dio --flash_size 4MB -o ./nuttx.bin nuttx wget -O bootloader.bin https://github.com/saramonteiro/esp32_binaries_nuttx/blob/main/bootloader.bin?raw=true wget -O partitions.bin https://github.com/saramonteiro/esp32_binaries_nuttx/blob/main/partitions.bin?raw=true esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 115200 write_flash 0x1000 bootloader.bin 0x8000 partitions.bin 0x10000 nuttx.bin Access NuttShell minicom /dev/ttyUSB0 -b 115200 References https://nuttx.apache.org/docs/latest/quickstart/index.html https://blog.csdn.net/u010947832/article/details/111572602 https://medium.com/the-esp-journal/getting-started-with-esp32-and-nuttx-fd3e1a3d182c https://medium.com/the-esp-journal/blink-led-on-esp32-with-rtos-nuttx-d33c7dc62156 https://www.youtube.com/playlist?list=PLd73yQk5Fd8JEsVD-lhwYRQKVu6glfDa8

I recently came across this tiny ESP32 deb board on Taobao. It is priced at only 16 RMB but it has all the necessary features including a CH340 chip and a charging chip with a JST-PH battery connector. On Taobao it seems to have the following name: It came without any documentation. It took me a while to find out that it is a Wemos Lolin32 Lite board that is no longer maintained by Wemos. The official information about the board can only be found on archive.org at here. The schematics is attached here.

Connecting an ESP32 to a WPA2 Enterprise WiFi requires a bit more configuration than other more common WiFi protocols like WPA PSK or WPA2 PSK. The code below has been tested on NUS_STU, which is a WPA2 Enterprise access point with PEAP, no certificate, and MSCHAPV2. #include "esp_wpa2.h" #include <WiFi.h> #include <HTTPClient.h> #define EAP_IDENTITY "e1234567a" #define EAP_PASSWORD "nusnet-pswd" const char *ssid = "NUS_STU"; void setup() { Serial.begin(115200); delay(10); Serial.println(); Serial.println(ssid); WiFi.disconnect(true); WiFi.mode(WIFI_STA); esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD)); esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT(); esp_wifi_sta_wpa2_ent_enable(&config); Serial.println("MAC address: "); Serial.println(WiFi.macAddress()); WiFi.begin(ssid); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("IP address: "); Serial.println(WiFi.localIP()); HTTPClient http; String serverPath = "http://ip-api.com/line"; http.begin(serverPath.c_str()); int httpResponseCode = http.GET(); if (httpResponseCode > 0) { Serial.print("HTTP Response code: "); Serial.println(httpResponseCode); String payload = http.getString(); Serial.println(payload); } else { Serial.print("Error code: "); Serial.println(httpResponseCode); } http.end(); String payload = http.getString(); Serial.println(payload); } void loop() {}

apt Follow Ubuntu 镜像使用帮助 conda Follow Anaconda 镜像使用帮助 pypi Follow pypi 镜像使用帮助 npm npm i -g nrm --registry=https://registry.npm.taobao.org nrm ls nrm use taobao 淘宝 NPM 镜像 nrm -- NPM registry manager

Introduction When installing Anaconda in Windows, it is common to not add its executables' location to the system PATH. In this case, we would usually run Python from the Anaconda Prompt: This post is about how to add Anaconda Prompt to Windows Terminal. Prerequisites Windows 10 Windows Terminal Anaconda Add Anaconda Prompt Open the settings of Windows Terminal: This will open the configuration file of Windows Terminal in an editor (VS Code in my case): Add the following under the profiles.list array (change the paths accordingly): { "commandline" : "powershell.exe -ExecutionPolicy ByPass -NoExit -Command \"& 'C:\\Users\\li_ru\\anaconda3\\shell\\condabin\\conda-hook.ps1' ; conda activate 'C:\\Users\\li_ru\\anaconda3' ; cd ~ \" ", // Make changes here to the Anaconda Prompt profile. "guid" : "{01234567-35be-5f56-a8ff-afceeeaa6101}", "hidden" : false, "icon" : "C:\\Users\\li_ru\\anaconda3\\Menu\\Iconleak-Atrous-PSConsole.ico", "name" : "Anaconda Prompt" } If you want this to be the default profile, then also add the following: "defaultProfile" : "{01234567-35be-5f56-a8ff-afceeeaa6101}" Note that you can change the guid, just make sure it is unique.

Here is a list of awesome npm packages I have used, kept here for future reference. PDF package description pdfkit a nice pdf generation library for Node and the browser markdown-pdf a CLI tool to generate pdf from markdown, using PhantomJS Captcha package description projects that use the package svg-captcha a pure JS library to generate captcha in SVG format captcha-provider Documentation package description projects that use the package swagger-jsdoc reads your JSDoc-annotated source code and generates an OpenAPI (Swagger) specification captcha-provider swagger-ui-express serve auto-generated swagger-ui generated API docs from express, based on a swagger.json file captcha-provider

Intro A WordPress wrapper plugin for MetingJS. Installation Download the latest release as a zip file Upload the zip file as a plugin to WordPress admin area Activate the plugin Usage Set default options in Admin -> Settings -> RC Meting. Add the following shortcode to where you want a Meting player to be placed at: Refer to Admin -> Settings -> RC Meting for supported attributes. Refer to MetingJS Options for how to set these attributes. Additional Information if the no_referer option is set to true, a meta tag will be added to the head section of the webpage to prevent sending the Referer header. It is noticed that if referer header is sent, sometimes Netease api will return 403. However, enabling this option will affect all requests made on the web page. Hence you should only enable this option if you know what you are doing. autoplay does not work due to an issue with Aplayer fixed mode is currently not displayed correctly

Deprecated! Since the Kratos theme I am using for this site uses a custom version of jQuery, it breaks some of the plugins that use the default jQuery that comes with WordPress which is in no conflict mode (must be invoked by jQuery(...) instead of $(...)). Below is an ugly workaround that seems to work. This is a record of the modifications I made to the theme files for later reference. header.php: line 22: from to inc/theme-core.php: line 72: from wp_enqueue_script('kratos', ASSET_PATH . '/assets/js/kratos.min.js', array(), THEME_VERSION, true); to wp_enqueue_script('kratos', 'https://lirc572.com/wp-content/themes/kratos-3.2.3' . '/assets/js/kratos.js', array(), THEME_VERSION, true); assets/js/kratos.js: line 5: from (function () { to (function ($) { line 191: from })(); to })(jQuery); Another problem with the theme is that it breaks all words in post content by default (so that English words at the end of lines can be separated in the middle). Below are the modifications to avoid this behaviour: inc/theme-core.php: line 72: from wp_enqueue_style('kratos', ASSET_PATH . '/assets/css/kratos.min.css', array(), THEME_VERSION); to wp_enqueue_style('kratos', 'https://lirc572.com/wp-content/themes/kratos-3.2.3' . '/assets/css/kratos.css', array(), THEME_VERSION); assets/css/kratos.css: line 819: from word-break: break-all; to word-break: normal; line 889: from word-break: break-all; to word-break: normal; line 988: from word-break: break-all; to word-break: normal; line 1091: from word-break: break-all; to word-break: normal;

URL of GitHub avatar: https://github.com/[username].png URL of GitHub identicon: https://github.com/identicons/[username].png For example, my avatar: https://github.com/lirc572.png My identicon: https://github.com/identicons/lirc572.png