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Step by Step instructions how to make smart home WiFi device with ESP32-EVB and Home Assistant without single line of code! https://olimex.wordpress.com/2025/05/30/step-by-step-instructions-how-to-make-smart-home-wifi-connected-device-with-esp32-evb-and-home-assistant-without-any-programming/ #esp32 #espressif #iot #homeassistant #esphome #wifi
#esphome
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Finally reflashed Xiaomi Air Purifier 4 Lite on #ESPHome
Thanks @morganmlg !
My comms and sensors center is running strong!
From left to right:
Seeed studio ESP32C3 with BME280 running #esphome
RTL-SDR running #ADS-B data gathering
Seeed Studio LoRa running #Meshtastic
All devices connected to a PoE powered #raspberrypi4 (the LoRa and esphome just use it as a USB power adapter)
Thanks to PoE I need to only have one cable coming from my switch.
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@kuketzblog
Die sind nur die #SpitzedesEisbergs
#Saugroboter #WlanSteckdosen , bzw. generell #Smarthome - Produkte aus Fernost funken alles brav "nach Hause".
Es gibt aber zumindest für Tüftler oft Alternativen aus dem #FOSS Bereich.
In Form von Soft-/Firmware welche die datensammelnde Herstellersoftware ersetzt.
Is it me, or is #ESPHome incredibly confusing?
Like, it either hangs, or a blank screen, or just nothing happens, or compile errors
But no actual clear "this is what's happening"...
REALLY frustrating experience
That was quick: got a cease&desist from #Remeha because apparently they don't know about Auteurswet artikel 45m, which allows for reverse engineering.
As a reminder, if you want to measure electricity usage with #HomeAssistant from any meter, check out glow! Easy #EspHome device. I just set it to listen our new meter led, until I get the proper connector.
glow-energy.ioHome | Home Assistant Glow 🌟The Home Assistant Glow makes a (not so) smart meter without a P1 port easily readable, using the pulse LED that is always present in most cases and it works with ESPHome!
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@3dprinting It's a puddle!
That's about 15 minutes of dehumidification in open air. The humidity here is 30%.
I got the wiring done, and I reassembled the dehumidifier with what I hope are the final pieces. I took a lot of photos so I can write an assembly guide.
I've still got work to do on the ESPHome firmware.
25/N
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@3dprinting This morning I soldered the FilaBilly dehumidifier PCB. I need to crimp up some connectors, reprint the orange standoff/surround (it's like 0.3mm too tight), and finish the firmware. Then it'll be system testing time! I already know the ESP32 boots, either from USB or 12V power.
I found out about r/PrintedCircuitBoard yesterday, so I'll ask for a PCB review there, even though the board is assembled.
23/N
Nice little trick to improve the WiFi on your #ESP32 boards with PCB antenna. The improvement is clearly visible 
https://peterneufeld.wordpress.com/2025/03/04/esp32-c3-supermini-antenna-modification/
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@MakersHour@cupoftea.social @makershour@a.gup.pe A4: I’m just about to do exactly this when my new workbench is done - I’ll be combining a 3d printed robot bust with electronics and a microcontroller powered by #EspHome to create a functional desktop robot voice assistant and then giving it a rusty paint job and using it for LLM experiments!
Just like that, a Mitsubishi mini split is now controllable via #esphome and the ever brilliant #homeassistant
$10 in parts and about 20 mins of time. (case 3d printing overnight so it looks like it belongs)
details to follow in a video/blog post
Over the past few days, I "channeled" my inner nerd into building an automated radiation detection system using open-source tools.
The device combines an ESP32 running #ESPHome for sensor data collection, my #HomeAssistant for centralized smart home integration, and #NodeRED for automating hourly Fediverse updates via a bot account
@Radiation_SL (since this Geiger counter is located in northern Germany ( #Schleswig )
Technical Breakdown:
Sensor: Radiation D-v1.1 (CAJOE) - radiation detector
Connectivity: ESP32 transmits via Wi-Fi to Home Assistant
Case: #3dPrinting the case (photo) - base is black and the lid is blue and shows the logo of "Fallout" (pc game/ TV series)
Automation: Node-RED flow formats data into ActivityPub messages
Decentralized Sharing: Posts include μSv/h readings
While this started as a hardware tinkering project, recent global events — nuclear rhetoric in conflict zones, aging power plants, and insufficient transparency in environmental monitoring — made me realize decentralized citizen science could play a crucial role.
Open-source tools eliminate single points of failure, and Fediverse integration ensures censorship-resistant data sharing.
Feel free to follow my bot account I mentioned above, if you are interested.
If I can find some time I will write a blogpost about the build process and link it in the bio / or just toot about it.
Stay informed about the latest radiation levels in northern Germany (in a small town called Schleswig) with this small and tiny bot.
It retrieves microsievert (µSv) data every hour from an #ESPHome device, seamlessly integrated with #HomeAssistant and #NodeRed.
This data is then forwarded to this #Sharkey instance, ensuring you receive timely updates on your social media feed.
Stay safe and stay informed! 
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@3dprinting I have a schematic. Next up: breadboard.
16/N
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@3dprinting Now I need to wire up the rest of the electronics. MOSFET to switch the Peltier, 12V power to the Peltier and fan, 5V converter for the ESP32, GPIOs to the MOSFET's gate and the fan's PWM and tach signals, and an I2C connection to the external temperature/humidity sensor.
I should draw up a schematic in KiCAD just to keep track of all the connections. I haven't used KiCAD in years...
15/N
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@3dprinting I drilled into the cold side heatsink and inserted the temperature probe. I got it into ESPHome and Home Assistant.
The first dip in the graph is with no thermal paste; the second is with paste. It drops a lot faster and further with paste. I stopped the second run at -13℃. N.B., there is no airflow through the heatsink yet. It won't get so cold with airflow.
So this is encouraging.
14/N
Continued thread
Afterwards I checked my #HomeAssistant energy monitoring data (provided by an Emporia Vue 2 flashed with #ESPHome). The yellow line is the voltage on one 120V leg from the transformer (the one that was going to burn up), and the blue line is the voltage on the other 120V leg.
The three sections of the graph are during the problem, while the power is out, and after the new transformer was installed.