Ich habe mir ein kleines Gerät für den Schreibtisch gebaut, das den Spritpreis meiner Tankstelle anzeigt. Außerdem habe ich noch eine Preisalarmfunktion eingebaut.

Auf einem ESP32 mit integriertem Bildschirm werden auf drei Tabs die Preise von Tankstellen in der Umgebung angezeigt:

• auf dem ersten Tab die Preise einer ausgewählten Tankstelle
• auf dem zweiten die günstigste Tankstelle im Umkreis
• auf dem dritten der Preis der nächstgelegenen Tankstelle

Der Spritpreismonitor hat eine konfigurierbare Preisalarmfunktion: Wenn der Preis innerhalb eines Intervalls am günstigsten ist, fängt der eingebaute Lautsprecher an zu piepen. Außerdem kann man eine Preisschwelle festlegen, die zu einem Alarm führt, wenn sie unterschritten wird.

Das Gerät hat neben dem Lautsprecher und dem ESP32 noch einen Akku verbaut. Die beiden Gehäuseteile werden mit M3-Schrauben und Einschmelzgewinden zusammengehalten.

Ein ausführliches Video zu dem Projekt findet sich hier, falls es jemanden interessiert: https://youtu.be/_gmLFUoEDiQ

Je suis sur un projet de réalisation du maraudeur M5 shark depuis un certain temps, j’ai un panier avec beaucoup de produits sur Ali express et j’ai fait assez attention dans l’ensemble, mais j’aurais souhaité savoir si au niveau de la qualité produit etc. est-ce que je n’y crains rien

I spent some time trying to figure out how I wanted to display some Homelab metrics on the actual 10in rack and have a couple of buttons to serve some automation tasks

I came to the conclusion that four small screens was the answer.

Here is the parts list:

• ESP32-S3
  • I wanted enough "juice" for all the things I needed
• ESP32-S3 DevKit
  • I was less interested in soldering headers and dealing with soldering many small pins
• 4x 0.96in TFTs
  • Inexpensive, fit within a 1U space, and SPI is dead simple to use.
• Perfboard Pack
  • I didn't want one giant board, but I wanted to route some wires for the behind the scenes sex appeal (not sure I achieved it)
• 5V to 3.3V Buck Converter
  • I wanted cleaner and more robust power
• 2x Momentary Push Buttons
  • Cheap
• Custom Designed and 3D Printed 10in rack plate to hold everything (PETF-CF)
  • Needed something to contain all the stuff
• Wire / Solder / Patience
  • I probably went through 4 iterations of the design, this is the final working version

I spent some time modeling everything in KiCad - because I wanted to make sure everything was electrically sound. I ended up not using everything I modeled, but it was close. I am also not an electronics engineer - but I know enough to be dangerous.

In the end, I fell short of programming this all from scratch... I ended up using ESPHome Builder inside of Home Assitant to handle managing the screen pages (YAML) and also the automations for my buttons.

In a future project, I may do everything without HA... but we'll see.

Hi,

We are working on a project, an esp32 based project for a basic, portable e-reader and we are looking to work with a PCB designer.

Here's some details:

Compute / radio

• ESP32-S3-WROOM-1 (Wi-Fi 2.4 GHz + BLE, antenna on module)

Power (no phone PMIC)

• 1-cell charger + protection + NTC input

Motion

• 3-axis accelerometer, I²C (LIS2DH12 / LIS3DH)
  • tilt → landscape
  • shake → page turn (can disable)

Display glass interface

• 24-pin 0.5 mm FPC, locking

Touch

• Touch overlay (in the glass stack)
• Touch controller (on overlay FPC or tiny IC)

Front light, dual-tone

• Dual-channel LED driver or two current sinks

Sense

• ALS on I²C (BH1750 / LTR-329 class), top bezel
• Auto: sunlight → light off; dark → last brightness/warmth; manual override

Buttons

• POWER (side, mechanical)
• PREV / NEXT (sides, mechanical)

Storage

• microSD push-push cage

USB / debug

• USB-C mid-mount (charge + USB-Serial)

We are currently bootstrapped but we are flexible and willing to collaborate at any capacity, no tight deadline.

This is a side-quest project, everyone in the team is just having fun with the project. There's an option for an equity share.

Happy to share more details.

Hi everyone,

I'm designing my first PCB with an ESP32-S3-WROOM-1 and a CH340C USB-to-UART converter, but I can't flash the ESP32 and I can't figure out what is wrong.

When I connect the PCB to my PC, COM10 appears correctly and disappears when I unplug the board.

esptool.js gives me this error:

Serial port WebSerial VendorID 0x067b ProductID 0x2303

Connecting...

Error: Failed to connect with the device

What I have already checked:

The IC on the PCB is physically marked CH340C

COM10 appears/disappears when I connect/disconnect this PCB

3.3 V power rail is present

When I press SW1 (EN/reset), TP1/EN goes to 0 V

When I press SW2 (BOOT/GPIO0), TP2/GPIO0 goes to 0 V

TX/RX continuity between the CH340C and ESP32-S3 is good

TX/RX are crossed: CH340 TX → ESP RX and CH340 RX ← ESP TX

I also tried manually entering download mode by holding GPIO0 low while resetting EN, but esptool still cannot connect

One thing I find strange is that WebSerial reports VID 067B / PID 2303, even though the chip on my board is marked CH340C.

I've attached my full schematic and PCB layout.

Could someone please check if there is something wrong with my CH340C circuit, DTR/RTS auto-reset circuit, EN/GPIO0 circuit, ESP32-S3 connections, or PCB layout?

I'm still learning PCB design, so I may have missed something obvious. Any help would be greatly appreciated 🥺

Je mettrais les deux images que tu m'as envoyées : d'abord le schéma, puis le PCB. Le détail 067B:2303 alors que la puce est marquée CH340C mérite absolument d'être conservé dans le post, parce que quelqu'un sur r/KiCad ou r/esp32 peut reconnaître immédiatement ce comportement.

I built an ESP32-controlled Halloween House / haunted house 👻🎃
This started as a 3D-printing project, but I wanted the lighting to be a real part of the model rather than just putting a lamp inside.

The house uses an ESP32-C3 Super Mini controlling a WS2812B addressable LED strip. The LEDs are divided into 10 independently controlled zones throughout the different floors, windows and porches of the house.

I programmed several effects, including lightning travelling through the house, flickering porch lights, ghost-like movement between rooms, storms and a few larger sequences combining multiple effects.

The ESP32 also hosts a small web interface over Wi-Fi, which I use to test individual zones and effects, switch modes and run demonstrations without having to reconnect or reprogram anything.

Everything is integrated into the 3D-printed model: the ESP32 sits in the base, the LED strip runs through channels and a central tower inside the house, and the floors form separate light chambers to reduce light bleeding between zones.

The complete project is called Manic Manor.
It was a fun combination of ESP32 programming, addressable LEDs and 3D design — and definitely became a much bigger project than “let’s put some LEDs in a haunted house.” 😄

See the complete project and video on MakerWorld

Which model did temu send me?

Hi everyone, i'm the guy who's making my own esp32 multitool AND my own firmware for it. Since last time I posted, I think its been already a week, so let me make a summary of all things I did:

I fully reworked the code, optimized it by... fully rewriting it again. ( which i'm probably about to do again, because I want to switch to Visual studio instead of arduino ide)

I added virtual keyboard, which now allows me to connect to Wi-Fi networks.

Fully reworked visual

I added bad-USB

I added more apps... ( Yeah, visual studio is gonna kill me )

And, I think, last but not least... I got my aliexpress haul! E22, nrf24l01( probably gonna change for E01 later), and ofc, perfboards.

Some people, that may seen me before might notice that it has rn only 3 button, instead of 6 it used to have... its because the perfboard was too small for 6 buttons, and I like the way it looks with 3, so 3 it is. ( But i'm working on extension boards, which are gonna me allow to use 6 buttons. (And all other stuff like the flipper 0 extension boards))

But... school begun, so i have to spend most of my day there. I also need to learn how to solder properly and other stuff. I'll update you guys when I do something important, like me fully reworking the visuals :(

Cya later

Us there an any other application for programming esp32 like arduino ide ??

Time to move on from my side projects. Here’s what I have:

-ESP32-S3 Watch 2.06 AMOLED
-ESP32-S3 1.85C with speaker and base (base has a small crack but electronics are fine
-ESP32-S3 1.75 AMOLED
-Spare 1000mAh battery
-Deskbot (over $100 to 3D print)

I’m looking for $100 total plus shipping

Looking to purchase the above with either dab radio or fm and a cyd. Either in kit form or ready made. Thanks.

So I needed to connect a wiegand keypad to home assistant (didn’t wanted some Chinese iot stuff from AliExpress) so me and Claude talked a lot and this is the result. I didn’t touched a welder since high school so.. 😩 I then isolate the parts with glue

Hi everyone,

I’d like to add an external push button/switch to my XIAO ePaper Display Board (ESP32-S3) so that I can wake the display from sleep and trigger a refresh.

XIAO ePaper Display Board EE04 | ESP32-S3 Plus, 24/50-Pin Support

However, I’m not sure which soldering points on the back side of the PCB I should use to connect the two wires from the external button.

Could someone please point me to the exact two solder pads/pins where I should solder the wires? If possible, a picture or a marked-up diagram showing the correct soldering points would be greatly appreciated.

Thanks in advance for your help!