Category: IoT

  • Bathroom dehumidifying using a floating humidity threshold

    Bathroom dehumidifying using a floating humidity threshold

    Blog: Bathroom dehumidifying using two sensors and a floating humidity threshold. Link to the original blog post with a nice text/pictures layout. The problem: The bathroom fan is running too long if it’s raining outside. A year ago I automated the dehumidifying of the bathroom using an extraction fan, Sonoff mini switch, Xiaomi Mi BLE…

  • Homemade ESP32 webcam

    Homemade ESP32 webcam

    Homemade ESP32 webcam Link to the original blog post with a nice text/pictures layout. The problem: I want to see what’s happening around the house, especially if the dog is naughty again and digging holes. Actually, there is no problem. I just like to tinker. The solution: A cheap webcam (10€) integrated in #homeassistant. HW…

  • Unlocking the front door using the mobile phone and Home Assistant

    Unlocking the front door using the mobile phone and Home Assistant

    Link to the original blog post with a nice text/pictures layout. The problem: The solution: HW parts: SW: The process: Here’s the doodle of the connecting scheme: Here’s the original connecting scheme from Innotherm (door manufacturer), in Slovenian: It was useful because it reveals which power supply is appropriate (Meanwell MW HDR 30-24). 7. Fitted…

  • How I killed e-ink display

    How I killed e-ink display

    TL:DR: I don’t know how, but it no longer works. In the previous post, I shared the joy of making #ESP32 #Lilygo T5 2.13′ e-ink display finally work and show some sensor data from #homeassistant. The joy lasted only a week. Yesterday I decided I’d print a nice case for it. I found a great…

  • E-ink display showing temperatures from Home Assistant

    E-ink display showing temperatures from Home Assistant

    I had this #esp32 #lilygo board* laying in the drawer for more than 2 years. I tried several times to make the e-ink display work without success.Today I flashed it again with the latest #esphome firmware, stole some code from the web, tinkered for 2 hrs with #yaml and lambdas and whatnot and suddenly… it’s…

  • Home Assistant and nice statistics graphs

    Home Assistant and nice statistics graphs

    One of the things that bothered me in #homeassistant for more than a year was the following: I couldn’t figure out why some entities/sensors can draw nice longterm statistics graphs like this (with average, max, min values): and some show only bulky history charts (10 days of data) like this: #til Today I learned I…

  • Detecting movement in Home Assistant using Ikea Vallhorn sensor

    Detecting movement in Home Assistant using Ikea Vallhorn sensor

    I’ve bought some #Ikea #Vallhorn motion sensors for 8€ a piece. (see info here) Pairing to the #Zigbee network in #HomeAssistant and #Zigbee2MQTT was somehow difficult, which is not usual for Zigbee devices (at least according to my limited experiences with them). Nevertheless, I succeeded in pairing them. Unsuccessful attempts Firstly I tried to pair…

  • Simple tablet charge controller using Sonoff’s ZBMini

    Simple tablet charge controller using Sonoff’s ZBMini

    I’m using an Amazon #FireHD tablet stuck to my fridge with several magnets and 3D printed case as a #homeassistant dashboard. I read it’s bad for the tablet’s battery if it’s constantly plugged into a charger. Battery can swallow or worse. So I installed Sonoff’s #ZBMini (Zigbee) smart switch into a socket where the charger…

  • When did I change the batteries in my sensors?

    When did I change the batteries in my sensors?

    Last month I learned about the integration which helps track battery change status in various devices connected to #homeassistant. Today I finally had some time to install #HACS integration (source) called ‘Battery Notes‘ which was written by Andrew. After the installation and HA restart, it automatically found my #Aqara battery devices (#Zigbee buttons, magnetic door…

  • Home Assistant and breaking changes (27. 12. 2023)

    I’ve been running #homeassistant for 2 years now and have never dealt with breaking changes. Until today. 1st breaking change: #ESPHome entities are unavailable After updating Home Assistant Core to 2023.12.4 and ESPHome to the latest (Dec. 2023) I’ve noticed ESP entities marked as ‘Unavailable‘. Moreover, all entities had duplicates in the entity list ending…