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ESP32 tips, tricks, specs, guides & tutorials · ESPHome LVGL UI designer 🤓🧑‍💻👩‍💻

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My camera roll has more microcontrollers than people. Just a hobby though 🫠

#microcontrollers #esp32 #electronics #solderlife #techhobby by @espboards

ESP-Mosaico by @espressif_systems_official is a dev board built for coding agents.

Your agent writes the firmware, flashes it, then tests and debugs it on the real board, all by itself.

So I vibe-coded a plant that guilt-trips me 🌵 One chat, one prompt to Claude Code, zero lines of code from me.

Live on Product Hunt today. Go upvote it, link in bio.

Board provided by Espressif.

#ESPMosaico #Espressif #ProductHunt by @espboards

NerdMiner is real bitcoin mining on a $5 esp32 - 21 kH/s of SHA256, hoping for a hash below target.

Your odds: one block per ~700 billion years (50x the age of the universe). But every 10 minutes is a fresh draw, solo means winner takes all 3.125 BTC, and it burns 1 watt.

Worst lottery ticket, best desk toy.

#nerdminer #nmminer #btc #mining #esp32 by @espboards

MT3608 in one minute 🔋

How a coil, a diode and a chip clicking a million times a second turn 2 V into 5 V, why you set the pot first, and why 1 A out is the line.

#mt3608 #voltage #converter #esp32 #buck by @espboards

A real calculator on real hardware, not an app.

Products in 2026 be like…

#calculator #subscription #premium #hardware #2026 by @espboards

Why the ESP32 antenna is a squiggle?..

A 12.5 cm wave needs ~31 mm of antenna. The module is 18 mm wide. Fold it, tune it, keep the board under it empty. by @espboards

Random ESP32 resets? It’s a brownout, not your code ⚡

WiFi TX pulls 400 mA almost instantly. Nothing local to supply it, so the rail dips and the chip resets - every single time.

Fix: 100 µF near the power input. Five cents.

#esp32 #brownout #power #capacitor #vin by @espboards

14 chips. One name. Which ESP32 should you actually buy in 2026? 🤔

Swipe for the letters decoded, the spec sheet, the wireless breakdown, and our picks for every kind of project.

TL;DR: ESP32 for tutorials, C3 for cheap Wi-Fi + BLE, S3 for displays and cameras, C6 for Matter/Thread/Zigbee, C5 for 5 GHz, H2 for battery Thread/Zigbee, P4 for raw performance.

Full comparison chart with all 14 chips: espboards.dev (link in bio)

#esp32 #espressif #esp32s3 #esp32c3 #esp32c6 by @espboards

Without a graphics library, drawing a single button means pushing pixels by hand. No touch, no styling, and you start over every time you swap displays.

With LVGL it’s one line: lv_btn_create(). Touch and styling come with it.

What’s in the box:
- 30+ widgets - buttons, sliders, charts, the usual
- Touch and gestures
- CSS-like styling, smooth animations
- Runs in 64KB RAM
- Free, open source, works over SPI, I2C, parallel

You don’t even have to write the LVGL code. Build the UI in your browser, export YAML, flash it.

🔗 lvgl.espboards.dev

#lvgl #esp32 #esphome #embedded #electronics by @espboards

Apple patented a non-linear LED fade back in 1999 - the breathing sleep light on their laptops. Here is why it mattered: your eye does not measure brightness, it measures ratios. Going from PWM 1 to 2 doubles the light and you see it instantly. 100 to 101? Invisible. Same plus one.

#apple #led #brightness #gamma #esp32 by @espboards

Copying one 320x240 frame to an SPI display blocks the CPU for 31 ms - about 90% of every frame slot. DMA is a separate copy engine on the memory bus. The CPU just writes source, length, go, then gets on with your code.

#esp32 #dma #tft #spi #display by @espboards

ESPHome LVGL Designer v1.4.0 is live.

The big one: the canvas now draws what LVGL draws. Its rules come from LVGL’s own C source, then every widget gets diffed pixel by pixel against a real ESPHome render, then checked on real hardware. Swipe to slide 2 for designer vs device.

Also new: Google Fonts for text widgets. Top and bottom layers. Monochrome OLED mode and exact e-paper inks. Redesigned properties panels.

Link in bio to try it free.

#esphome #esp32 #lvgl #uidesigner #homeassistant by @espboards