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For battery powered ESP 8266 projects we would like to have a full control over electrical components that we use on board. This is because everything that draws power will also drain our battery, and this is something we want to avoid. The Wemos D1 Mini module seems to have the lowest memory consumption of them all, but we can still be better. In my battery powered projects I use ESP-12F modules and custom power...

The ESP 8266 has relatively high power consumption (around 70-80mA) which makes battery powered devices difficult to build, unless we accept a very short battery lifetime. Reasons for this are apparently connected with WiFi communication model, which is not especially economical, big processing power of the ESP chip itself has also an influence on this. But I really like 8266 because setting up the network topology is trivial - there is nothing to be set...

For some time I had an idea to do few “home improvements” and, as a side effect, learn a bit about microcontrollers and electronics. So called “smart home” can be expensive - there are a lot of out-of-the-box solutions that cost a small fortune (as I said: “for some time”, now it is cheaper). So my idea really was: can I do it as cheap as possible? After some research I decided to build my...