This mode can be used in systems wherein continuous data transmission is not required. For interfacing problems with USB, download the CH340 driver. For development boards like the NodeMCU v2 or the WeMOS D1 mini this is essential in order for flashing over serial-to-usb to work or for receiving serial output. Wake ESP8266 by input signals during Deep Sleep the same way as Pin Change Interrupts. Moreover, you learn how to use the power modes of the ESP8266 to reduce the power consumption up to 99% in the deep sleep mode. The Deep Sleep requires a simple hardware modification - a jumper is needed between the Reset Pin and and Pin D0 of the Wemos D1 mini. Several shields, sensors and output devices that are manufactured for the Arduino platform will work on the WeMos-D1R2 with the added advantage of builtin WiFi D1 mini v3.
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