"Based on the provided content, here is the translation of the key segments into English."

"This article is sourced from: https://mp.weixin.qq.com/s/n8tS6vXCmOcxRkEmydQ8zg If there are any copyright issues, please notify us at 13951431913#139.com or submit a comment on the right."

"That Kindle 7 in the drawer has been gathering dust for years. After switching to the Paperwhite 10 with a front light, this non-backlit 7th generation model was replaced."

"A few days ago, I pulled it out with the intent of repurposing it as a desktop calendar and weather display in the entryway: schedule wake-ups, update the monthly calendar and weather on the e-ink screen, then go back to sleep."

"The prompt is attached at the end of this post. You can copy it and send it to an AI assistant like Claude Code, Cursor, or Codex to have them perform the setup. The assistant will first diagnose the device and then carry out the necessary actions. For those who prefer a hands-on approach, the details are outlined below."

"Confirming Hardware and Firmware"

"I flipped the device over to check the label and confirmed the model: Kindle 7 (the 2014 7th generation entry-level model, codenamed KT2)."

"Display: 6-inch electronic ink screen (600×800, 167 ppi, 16 levels of grayscale)"

"Front Light: None (it won't be visible in the dark, making it suitable for a bright hallway or desk)"

"Storage: 4 GB"

"Firmware Version: 5.11.1.1"

"This machine was previously flashed with CrackDroid for dual-platform use."

"Years ago, I installed the CrackDroid dual-platform firmware (Android 4.4.2 + native Kindle OS) via fastboot:"

"To switch from native to Android: Settings → Device Options → Reboot"

"To switch from Android to native: 'Eink Settings' → Click 'Start Kindle'"

"While Android 4.4.2 was significantly slower on this hardware, the installation did reset the native platform, clearing any pre-existing jailbreaks or KUAL. Therefore, the current modification will be performed solely on the native platform."

"Jailbreaking the Firmware (KindleBreak)"

"The 5.11.1.1 firmware is compatible with the KindleBreak exploit (supporting versions 5.10.3–5.13.3), which was downloaded from the MobileRead community as the jb-kindlebreak.zip package."

"I enabled Airplane Mode to prevent automatic updates."

"I extracted the zip file and copied the jb, jb.sh, kindlebreak.html, and kindlebreak.jxr files to the root directory of the Kindle."

"I placed the file__0.localstorage file into the /.active_content_sandbox/browser/resource/LocalStorage/ directory (creating the folder if it didn't exist)."

"I disconnected the data cable and launched the built-in 'Experimental Browser'."

"After the browser crashed, I waited 1–5 minutes for a restart. The appearance of the 'Application Error' or 'Collecting Debug Info' pop-up confirmed a successful jailbreak."

"Verifying Jailbreak and Applying Hotfixes"

"Entering ;log into the browser's address bar yields no result, which is expected as this command requires the installation of the hotfix package."

"I checked the root directory for the jailbreak log file, kindlebreak_log.txt, to confirm the process succeeded."

"Next, I installed the Universal Hotfix by downloading Update_hotfix_universal.bin from KindleModding/Hotfix and copying it to the root directory."

"I disconnected the cable again, navigated to 'Settings → Menu Icon → Update Your Kindle',"

"After the restart, I selected 'Run Hotfix' from the library. Confirming the installation was successful, entering ;log now opened the debug window."

"This hotfix provides three critical features: the ability to inject ;log commands, the installation of the FBInk tool, and the activation of sh_integration, which allows library scripts to run with root permissions."

"Abandoning KUAL and linkss in Favor of Screen Saver Replacement Scripts"

"The traditional method of using the KUAL menu with the linkss plugin is not viable here. The new KUAL (PEKI) requires firmware 5.12.2.2 or higher, and many linkss links are outdated and limited to static, local rotations, failing to meet the needs of a remote, timed grabbing service."

"The hotfix's sh_integration feature allows .sh scripts placed in the documents/ folder to appear as readable books in the library, executing with root privileges."

"Since the goal is to replace the screen saver images, using a Shell script is a cleaner approach than relying on outdated plugins. The script can temporarily mount the filesystem as read-write, backup the original images, and replace them with the updated calendar and weather data."

"Screen Saver Replacement Details"

"The native screen saver images are stored as PNG files (bg_ss00.png to bg_ss19.png) at a resolution of 600×800 in the /usr/share/blanket/screensaver/ directory."

"Key points:"

"The root filesystem is mounted as read-only, so the mntroot rw command is required before replacement, followed by mntroot ro to restore it."

"It is essential to backup the original images (likely located in the ~/.cache/blanket/ directory) for future restoration."

"Replacing all 20 images with a single file ensures that the device displays the calendar consistently while asleep."

"There is no need to restart the Kindle framework (stop framework && start framework) as the platform reads the images directly from disk when entering sleep mode. Therefore, the replacement should be completed before the device goes back to sleep."

"Automation Update Mechanism"

"Server-side (Small Computer / NAS):"

"A Python script uses the Pillow library to generate a 600×800 image containing the monthly calendar (with support for lunar calendars, holidays, and solstices) and the current weather data."

"The weather information is fetched via the Open-Meteo API, which is free and does not require an API key."

"If there is an error fetching the data, the previous cache is used as a fallback."

"Client-side (Device):"

"Scheduled Wake-ups: The device is set to wake up using the RTC (Real Time Clock). It is crucial to interact with the powerd service rather than writing directly to the kernel, as the Kindle's rtcWakeup function overrides direct writes. This is typically set during the 'readyToSuspend' phase."

"Wi-Fi Recovery: Since Wi-Fi takes time to reconnect after waking up, the script implements a three-stage retry logic (waiting 15 seconds, resetting and waiting 30 seconds, with a maximum retry time of 150 seconds) to ensure the image is downloaded before the battery is drained."

"Display Refresh: After downloading the new image, the script forces a screen refresh using the eips -g command to update the display."

"Timestamps: All time calculations are based on POSIX time (wall-clock time) to prevent errors related to the device sleeping while a sleep timer is running."

"Device-side Execution Flow"

"![Execution Flow Diagram]"

"Final Result"

"Project Code"

"The full code and a record of the challenges faced during this project are available on GitHub: https://github.com/fanzhh/kindle-calendar-weather"

"The docs/pitfalls.md file contains detailed notes on issues such as ;log dependencies, the powerd service overwriting RTC alarms, the delay in Wi-Fi reconnection, the behavior of the BusyBox timer, and the parsing of Shell parameters."

"Appendix: Automated Setup with AI"

"If you prefer not to perform the manual configuration steps, you can copy the following prompt to a compatible AI assistant with terminal and file access (such as Claude Code / Cursor / Codex). Ensure your Kindle is jailbroken, hotfixes are installed, and the device is connected to your computer via USB."

```json { "prompt": "Based on the provided context, here is the translation of the key segments into English." } ```

Placed at the door entrance, it's clearly visible during daytime. Idle hardware is being re-utilized.

项目代码

Code and troubleshooting notes have been organized on GitHub:

https://github.com/fanzhh/kindle-calendar-weather

The docs/pitfalls.md file records specific challenges encountered (such as missing log dependencies, powerd overwriting RTC alarms, WiFi recovery time after wakeup, busybox timer mechanisms, and shell parameter parsing).

Appendix: Delegating most work to the AI assistant

If you don't intend to write manually, you can copy the following prompt to an AI assistant compatible with terminal and file operations (like Claude Code / Cursor / Codex). Prerequisites include a jailbroken Kindle with installed hotfix and connected to a computer.