In comparison to the ESP8266 NodeMCU, we see that the WeMos D1 Mini has a much lower current consumption during the light and deep sleep power modes. In the light sleep power mode, the current consumption is only 0.68mA because the WiFi module and the system clock are disabled and in the deep sleep mode, you can reduce the current drain to 0.17mA so that also the CPU is disabled. The ESP8266 has several power saving modes that you can use to further reduce the power consumption. If you have any suggestions, let me know in the comment section under this tutorial. Currently I have no explanation why the power consumption of the WeMos D1 Mini with an empty script is higher as during a WiFi scan. Unfortunately, I measured a higher power consumption of 72mA with an empty Arduino script and a 5V power supply. But be aware that if the voltage gets higher than 3.6V you can damage the ESP8266.ĭuring a WiFi scan with a 5V power supply the current consumption of the ESP8266 WeMos D1 Mini is 68mA. 3V Pin (not recommended): Because the 3.3 pin is directly connected to the ESP8266 after the voltage regulator, you can also power the WeMos D1 Mini via a stable 3.3V voltage on the 3.3V pin.I recommend reading my article about what is the best battery of the ESP8266 microcontroller to get more information. Therefore you are able to power the WeMos D1 Mini with a LiPo battery with JST connector in combination with the battery shield for the WeMos D1 Mini.
5V Pin: If you use an external power supply like a battery or laboratory power supply, you can use the VIN pin.The standard USB connection delivers 5V and allows you to draw 500mA in total. Micro USB: The most popular and the easiest way to power the microcontroller is via USB cable.You have two possibilities to power the ESP8266 WeMos D1 Mini in a save way and one additionally possibility that I do not recommend.
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