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wtf is lvgl-seniverse-weather-screen-esp32?

ocfh/lvgl-seniverse-weather-screen-esp32 — explained in plain English

Analysis updated 2026-05-18

49CAudience · developerComplexity · 3/5Setup · moderate

TL;DR

This is ESP32 firmware for a small desktop weather display that auto-detects your city by IP and shows live temperature from the Seniverse weather API on an LCD screen.

Mindmap

mindmap
  root((weather screen))
    What it does
      IP based city detection
      Live temperature display
      LCD graphics UI
    Tech stack
      ESP-IDF
      FreeRTOS
      LVGL
      cJSON
    Use cases
      Desktop weather display
      ESP32 hardware project
      RTOS reference example
    Setup
      ESP32 board and LCD
      Seniverse API key
      WiFi credentials

Code map

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filefunction / class

Why would anyone build with this?

REASON 1

Build a physical desktop weather display using an ESP32 and an LCD screen.

REASON 2

Reference how to coordinate WiFi and HTTP tasks on ESP32 using FreeRTOS event groups.

REASON 3

See a working example of drawing a refreshing UI on an ESP32 with the LVGL graphics library.

What's in the stack?

CESP-IDFFreeRTOSLVGL

How it stacks up

ocfh/lvgl-seniverse-weather-screen-esp32dantiicu/wine-nxeriktromp/colibri-hy3
Stars494850
LanguageCCC
Setup difficultymoderatehardhard
Complexity3/55/55/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 1h+

Requires ESP32 hardware with an LVGL-compatible LCD screen, ESP-IDF installed, and your own Seniverse API key.

No license information is provided in the README.

Wtf does this do

This project is firmware for a small desktop weather display built on an ESP32 microcontroller. It shows the current city, temperature, and last update time on an LCD screen, and it figures out your city automatically from your network's IP address rather than requiring you to set a location by hand. It is built with ESP-IDF, the official ESP32 development framework, and uses FreeRTOS to coordinate tasks like connecting to WiFi and making network requests. Once WiFi is connected, the device calls an IP based location service to determine the city, then calls the Seniverse weather API to get the current temperature and the time the weather data was last updated. The screen itself is drawn using the LVGL graphics library, with separate text labels for the city name, temperature, and update time that refresh on a timer. The code also handles HTTP responses that arrive in chunks rather than all at once, and parses the weather API's JSON response using the cJSON library. To build and run this yourself, you need an ESP32 board with a compatible LCD screen wired up, plus the ESP-IDF toolchain installed. You clone the repository, replace a placeholder API key with your own Seniverse weather API key, fill in your WiFi network name and password in a configuration file, and then build and flash it to the device using standard ESP-IDF commands. The README also mentions needing to fill in a city name font library and uncomment the IP location code before it will fully work. This is a hobbyist electronics project for people who already work with ESP32 hardware and want a small physical weather display for a desk, rather than a general software tool. The README documents the RTOS synchronization mechanisms used, such as event groups for signaling when WiFi and HTTP tasks complete, which may also be useful as a reference example for other ESP32 and LVGL projects.

Yoink these prompts

Prompt 1
Walk me through wiring an ESP32 and LCD screen and flashing this weather display firmware.
Prompt 2
Explain how the FreeRTOS event groups coordinate WiFi and HTTP requests in this project.
Prompt 3
What do I need to change in the code before I can compile and flash this to my own ESP32?
Prompt 4
How does this project use LVGL to draw and refresh the city, temperature, and time labels?

Frequently asked questions

wtf is lvgl-seniverse-weather-screen-esp32?

This is ESP32 firmware for a small desktop weather display that auto-detects your city by IP and shows live temperature from the Seniverse weather API on an LCD screen.

What language is lvgl-seniverse-weather-screen-esp32 written in?

Mainly C. The stack also includes C, ESP-IDF, FreeRTOS.

What license does lvgl-seniverse-weather-screen-esp32 use?

No license information is provided in the README.

How hard is lvgl-seniverse-weather-screen-esp32 to set up?

Setup difficulty is rated moderate, with roughly 1h+ to a first successful run.

Who is lvgl-seniverse-weather-screen-esp32 for?

Mainly developer.

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