r/esp32projects

Tired of explaining esptool commands to my factory workers every time we needed to flash devices, so I built a desktop app that handles everything automatically.

What it does:

- Auto-detects Python and esptool on startup — installs esptool via pip if missing

- Auto-detects ESP32 devices by USB vendor ID (CP2102, CH340, FTDI, native USB)

- One-click flash with progress bar and live esptool output

- Factory mode — plug in a device, it flashes automatically, unplug, plug next one, repeat indefinitely

- Works on Mac and Windows

- Dark theme

Built with: Java 17 + JavaFX + jSerialComm

I'm building IoT energy monitoring devices (ESP32-C6 based) and needed something my factory floor team could use without any technical knowledge. Figured others might find it useful too.

Open source, MIT license: https://github.com/AjinkyaGokhale/esp-flasher-java

Feedback welcome — especially if you test it and find any bugs!

Boa noite galera ja faz uns dias que estou tentando usar um ESP32-C3 SuperMini com um modulo de cartão SD mas sem sucesso, achei que poderia ser o modulo, então comprei outro modelo de modulo de cartão SD e ainda sim sem sucesso, pensei em ser o ESP32-C3 SuperMini então comprei um ESP32 WROOM-32U e testei os 2 módulos de cartão SD e ainda não consegui fazer funcionar, engraçado que um modulo MFRC522(Modulo RFID SPI) funcionou perfeito usando os mesmos pinos. Preciso da ajuda de vocês 🙏🏻

Thanks to ESP32 Bluetooth, you can quickly save your Wi-Fi settings. It's an alternative to Wifi Captive Portal. I hope it's useful. google play

Does anyone know how I can make such a high level project diagram, This diagram I've made by downloading photos and connecting the pin through line in lucid.app. Is there any tool where I can get almost all the comments or modules and can make a high level project diagram?

This is my second build after YUMO-CYBER.

🧪 The casing is handmade using epoxy resin — cast and finished by hand 🧪

Getting more advanced each time!

— AI assisted.

Would love to hear your thoughts! 🙏

💾 Full source code:

https://github.com/yumobuilds/yumo-pulse

Hi! This is my first esp32 pcb for a simple pyrotechnic trigger for a rocket parachute. The board is working but the only issue is I need to press the reset button everytime for the esp32 to start running the code. I found that removing the capacitor C1 at the reset button solves this issue, the code starts running on boot, but i can't go into programming mode by holding boot and pressing and releasing reset without the capacitor. How do i fix this issue? I can't press the reset button everytime i need to power the board on.

For power i have an LM7805 converting 2S (7.4V) battery voltage to 5V and an AMS1117 converting the 5V to 3.3V.

Hey everyone!

I’ve been working on a project called ESPTimeCast™, a WiFi-enabled LED matrix display built with ESP8266/ESP32 — and it just passed 1.4k ⭐ on GitHub 🎉

It can display:

• Time & weather
• Date and weekday
• Now playing (title + artist via Chrome extension, YouTube, Spotify, etc.)
• Custom messages (Web UI, Chrome extension, Home Assistant)
• Nightscout integration (Glucose monitoring)
• Home Assistant integration
• Countdown, Pomodoro timer, and more

The goal was to make something that looks clean but is also easy to set up.

🔧 You can install it in two ways:

• Web Installer (no coding required, take less than a minute)
• Upload via Arduino IDE (for full control)

Everything runs locally, and the device exposes a simple web UI for configuration.

Would love to hear what you think or any ideas for features 😉

https://esptimecast.github.io/

🤟Hi! I'm looking for testers for a new desktop app that supports Meshtastic-compatible LoRa devices.

If you're interested, send me a private message on Reddit to get access to the private tester group👌

hey guys, soldering newbie here! i'm trying to work out this tutorial on getting an rtsp mic set up for my BirdNET-Go instance. i bought the two boards suggested on the github and soldered them together in the right way (i thought). the esp board itself works fine with the flashed firmware but i'm not getting any mic input from the second board. i was wondering if anyone could nudge me in the right direction on how to troubleshoot? thanks in advance!

Astronomy Micro Station for LILYGO T-Display S3 Pro

A standalone astronomy display for the LILYGO T-Display S3 Pro (ESP32-S3).
Tracks the sun, moon, and light conditions — sunrise, sunset, golden hour, blue hour, twilight phases, moon phase and illumination — across four touch-navigated screens. Data fetched from ipgeolocation.io and cached locally for offline use.

https://github.com/sfrechette/astro-micro-station

So I’ve been building a remote-controlled lawn mower using an ESP32 and a PS4 controller, and I’m pretty happy with how the software has come together. Wanted to share the details for anyone doing something similar.
The hardware:
• ESP32 as the brain
• Two Cytron 13A MD13S DC motor drivers for the tank-style drive tracks
• Three relays — an arm relay, a mower motor relay, and a turbo relay
• PS4 DualShock controller connected wirelessly via Bluepad32
How the controls work:
The unit drives in tank mode. You can toggle between dual-stick (each stick controls one track independently) and single-stick (left stick Y = throttle, left stick X = steering mix) by pressing the PS button. The controller LED changes colour to show which mode you’re in — blue for dual stick, green for single stick.
The mower blade has a safety start sequence. When you press R1, an arm relay fires first and holds for 500ms, then the motor relay latches on and both stay high together. Press R1 again and both drop simultaneously. This gives a deliberate two-stage interlock before the blade spins up.
There’s also a turbo relay on Triangle that flashes the controller LED white while active.
The D-pad works as a secondary driving option. The speed ceiling is set by how hard you squeeze L2 — the harder you’ve squeezed it, the faster the D-pad will drive. L1 resets that speed back to zero. Clever for creep mode.
The analog sticks use a gentle S-curve so the low end is slow and precise, and it ramps up more aggressively toward full deflection.
On disconnect, everything shuts down immediately — motors stop, all relays drop. No runaway mower.
The PS4 LED tells you everything at a glance:
• Solid blue = dual stick mode
• Solid green = single stick mode
• Flashing red/blue or red/green = mower motor relay is latched on
• Flashing white = turbo active (white takes priority)
Why Bluepad32 over the PS4Controller library?
Bluepad32 pairs by just holding the PS button — no sixaxispairer tool needed. It also gives you proper analog trigger values, a cleaner API, and it’s actively maintained. Highly recommend it for any ESP32 gamepad project.
Happy to share code if anyone’s interested.

three weeks ago id never soldered anything. now i have a Tru espresso machine that holds boiler temp at ±0.5°C, hosts its own web UI at frank.local, and switches between brew and steam modes from my phone.

i call him Frank (Frankenstein) because his guts are everywhere and he's held together by hope.

what's inside:

- ESP32 running a custom PID control loop

- K-type thermocouple + MAX31855 amp clamped to the boiler

- 40A SSR replacing the original bimetal thermostat (which was swinging ±15°C around target)

- SSD1306 OLED with a custom startup animation (Frank opens his eyes, blinks, then a "FRANK IS AWAKENING" loading bar)

- ESPAsyncWebServer hosting a control panel at frank.local

- separate PID tunings for brew (gentle, accurate) vs steam (aggressive, recovers fast)

biggest gotcha: the original control board kept overriding my SSR until i traced the circuit and realized the board was the upstream controller. tapped mains directly, let the ESP32 take full control of the heater, and now the original board just handles the pump and front buttons.

questions for the community:

- any tips for tuning steam mode PID on a low-thermal-mass thermoblock? recovery is faster now but still slower than i'd like

- thinking about adding a TRIAC dimmer for pressure profiling next, has anyone done this on a vibratory pump?

happy to share the firmware if anyone wants to do something similar.
Also check out the repo! -> https://github.com/mufferio/esp32-espresso-mod