ESP-NOW is a much more energy efficient protocol compared to regular WiFi that can make your battery-powered ESP devices run for months or even years. The downside is that we usually want to send data to servers that don’t speak ESP-NOW. So here is a solution: a gateway that takes ESP-NOW messages and sends them over WiFi, for example as HTTP requests to an API.
What is the current draw of a Wemos D1 mini board in deep sleep? And while connected to WiFi?
These are good questions when you are trying to power an ESP8266 board, like the Wemos D1 mini from a battery.
The best way to optimize power consumption is to use the deep sleep mode but not all boards are the same, even when talking about Wemos D1 mini boards. In fact the differences are considerable!
There are many different versions of the well known Wemos D1 Mini. Do all boards have the same power consumption during deep sleep? Let’s find out.