NodeMCU ESP8266¶
The NodeMCU board is fully supported by ESPHome. Simply select ESP8266
when
the ESPHome wizard asks you for your platform and nodemcuv2
as the board type.
Note
Most NodeMCU that can be purchased now are version 2 or upwards. If you’re using an
original v1 board, set the board type to nodemcu
.
# Example configuration entry
esphome:
name: livingroom
esp8266:
board: nodemcuv2
The NodeMCU’s pin numbering as seen on the board (the D0
etc pins) is different from
the internal pin numbering. For example, the D3
pin number maps to the internal
GPIO0
pin. Fortunately ESPHome knows the mapping from the on-board pin numbers
to the internal pin numbering, but you need to prefix the pin numbers with D
as in
the image below in order for this automatic mapping to occur.
In general, it is best to just use the D0
, D1
, … pin numbering to avoid confusion

Pins on the NodeMCU ESP8266 development board.¶
Note that in certain conditions you can use the pins marked as INTERNAL
in above image.
D0
also can be used to wake the device up from deep sleep if the pin is connected to theRESET
pin. On some boardsD0
is additionally connected to the LED next to the UART chip, but in an inverted mode.D3
,D4
andD8
are used on startup to determine the boot mode, therefore these pins should not be pulled low on startup. You can, however, still use them as output pins.D4
additionally is connected to the blue LED next to the antenna, but in an inverted mode.A0
: This pin can be used as a normal GPIO pin (likeD1
etc) but additionally can measure voltages from 0 to 1.0V using the Analog To Digital Sensor.VIN
: This board can be powered by an external power supply by using this pin. Supply a voltage depends on the board you use. Some boards support up to 12V, some up to 5V.ENABLE
/RESET
: When these pins are triggered, the board resets. The difference between the pins is how they can handle voltages above 3.3V.
# Example configuration entry
esphome:
name: livingroom
esp8266:
board: nodemcuv2
binary_sensor:
- platform: gpio
name: "Pin D0"
pin: D0