use a smart switch to turn off a lithium battery charger
I know that I ought not leave things powered on. Knowing that is easier than remembering that an e-bike or drone or laptop battery is still connected. Below I show how to turn on...
Tagged: Sonoff
how to stop a (hue) light and switch state getting out of sync
how a light can be on when its switch is off I’ve a number of smart light bulbs that, in addition to a wall switch, can be turned on or off either by say,...
how to know when the washing machine has finished
If you need to know when a device, like a dryer or washing machine has finished working, get a ‘smart plug with energy monitoring‘. Amazon list many of them but whichever brand you get,...
how much oil / electricity do I use in a day – Home Assistant or espHome
The measurements that I take around the home provide two things: – a picture of a moment in time – a room temperature for example. – how something changes over the course of a...
can I integrate ‘HomeEasy’ 433MHz devices with Home Assistant?
Yes. Below you’ll see how to control HomeEasy devices through Home Assistant and the RFlink receiver/transmitter. (This also controls other manufacturers’ wireless sockets). You’ll be able to create timers and automation to turn things...
use one switch to turn on two lights – in any combination
The need: you use a table light for watching TV and a main (wall) light at other times and you want a coffee table button to switch between one or the other or have...
T4EU1C and Home Assistant
a 3-gang wall switch for your home automation – using eWelink, T4EU1C and Home Assistant I got to a point where I had plenty of ‘smart’ lights and gadgets but few switches. But then...
set up rflink to respond to 433MHz devices and then integrate them with Home Assistant
In this project we integrate inexpensive 433MHz RF devices with modern smart devices see also: 433MHz smarter letterbox how to set up RFlink so that it will read your RF sensors The easiest ready-to-roll...
project: plot the temperature of your fridge-freezer, pet home or fermenting wine on a history graph in Home Assistant
In a previous project I set up temperature sensors in my room and sent the data via Bluetooth to Home Assistant, the home automation platform. Home Assistant is software that can record measurements and...
project: plug-in energy meter with graphs of energy use over time
‘Smart meters’ and metering devices usually measure the electricity used by the whole house*. However I prefer to pay attention to the electricity used by individual devices, such as a combination oven, fan heater...
control a sonoff switch using eWelink and Home Assistant – without IFTTT or firmware flashing
In this project I control a Sonoff light switch using Home Assistant. You can do the same with other Sonoffs. The switch shown here is the T4EU1C wall plate switch. It works over wifi...
control a sonoff switch from Home Assistant using IFTTT
The regular way to switch a Sonoff relay is to use the official ewelink app. Other ways require you to ‘flash’ the Sonoff device with Tasmota or ESPHome software and then control it with...
433MHz (aka RF) sensors and devices are good value
How to make inexpensive, ‘old’ technology, 433MHz devices work with today’s smart devices see also: 433MHz smarter letterbox RF sensors and receivers If you’ve used any of the following examples you probably own some...
433MHz smarter letterbox – for when you don’t want to walk to the letter box
see also more about 433MHz devices The letterbox is five doors and fifty metres from my desk. The uncertainty of the post lady arriving in the afternoon means that I make wasted journeys to...
customise a Sonoff smart relay (esphome 3b)
‘own’ your own devices THE FOLLOWING PROCESS IS STILL USEFUL – HOWEVER SONOFF DEVICES CAN WORK WITHOUT MODIFICATION IN HOME ASSISTANT (SEE HERE) AND THE EWElink app. THE ADVANTAGE OF THE FOLLOWING, WHERE YOU...
project: an immersion heater that turns itself when the water is hot – using a Sonoff POW relay.
Domestic hot water can be heated by a gas or oil central heating boiler or by an electrical immersion heater. I take advantage of half-price nighttime electricity and use an immersion heater. In this...
