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#esphome

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Water tank level sensor: 4–20mA current loop, ESPHome, and Home Assistant

blog.narf.ssji.net/2025/06/30/

Our house water comes from a rain water tank. I built an ESPHome device, based on an Olimex ESP32-PoE2, to interface a 4-20mA current-loop liquid pressure sensor, and keep track of the water level in Home Assistant.

Ich habe das #blinkyparts Unicorn mit einem ESP8266 und einen Transistor per #ESPHome mit #homeassistant steuerbar gemacht. Jetzt blinkt es, wenn der Bewegungsmelder an der Gartentür auslöst und ich weiß das ich die Katzen reinlassen kann :) Danke an die lieben Menschen im @chaospott die mir bei der Erweiterung geholfen haben. Für mich war es das erste Mal, dass ich bei einem Lötprojekt von der Blaupause abgewichen bin ❤️

The Sonoff S31 with native firmware has been a terrible disappointment. It still requires the app to pair, pairing is insanely hard, and then when done, it appears that Home Assistant (using a HACS integration) doesn't see it. (I'm guessing the issue is getting mDNS to traverse my VLANs.)

I think I'm going to need to flash a firmware to use this. So onto the tail of the project queue it goes.

Sad that I missed attending a #HomeAssistant community day event. But glad that the reason was because I took the chance to install the first sensors in my bathroom renovation, during a pause in construction work.

Having everything open is a once in a quarter century chance to hardwire in leak detectors beneath bath, sink, and washing machine. (All going back to a central ESP32 board).

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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Now that I could just plug the board into a random USB power adapter, and the LED strip into the board, the only remaining piece was software. Since I was relying on #ESPHome, it was just a matter of setting up my #HomeAssistant as a time-source and wiring a loop to switch LEDs every second. The only tricky part was translating indices to take into account LED strip being a single continuous sequence of lights arranged in a zigzag manner. #IndicesOfTime

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For the hardware, I knew I wanted to go with ESP32. It's ubiquitous and cheap. While I have some experience programming for it, my intent was to actually avoid need to do so thanks to the fantastic #ESPHome. It's surely an overkill for this project, but it would just take few dozen lines of YAML config and would give me Over-the-Air updates, logs and what not. So here I am, looking for a way to drive WS2182 with an ESP32 controller. #IndicesOfTime

My laser saver for yesterday, May 4. :-)

Building an ESPHome multi-sensor: Bluetooth proxy (mainly for Bermuda BLE trilateration), temperature, humidity, and motion sensors.. I used an D1 Mini ESP32 AM313 + BME280. Currently testing the HC-SR501. It is larger, but the sensitivity and delay can be adjusted.