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...
Tagged: Sonoff
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 I found a 3-gang version of the T4EU1C wall plate switch. It works over wifi...
set up rflink to respond to 433MHz devices and then integrate them with Home Assistant
In this project we integrate inexpensive ‘old’ 433MHz 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 – however Home Assistant doesn’t* work with ewelink. Other ways require you to ‘flash’ the Sonoff device with Tasmota...
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)
Software which allows you to ‘own’ your devices ESPhome can be used to reprogram a ESP chip so that Home Assistant can control it. I use it to re-program a Sonoff S20 smart plug...
project: smart immersion heater
Domestic hot water can be heated by a gas / oil central heating boiler or by an electrical immersion heater. I choose to take advantage of half-price nighttime electricity and use an immersion heater....
