Error compiling 'D4' was not declared in this scope

[pb-dyim]

When i try to compile with pin D4 as the DHT pin, it doesn't compile and complains:

Using library Wire at version 1.0 in folder: /Users/dyim/Library/Arduino15/packages/esp8266/hardware/esp8266/2.3.0/libraries/Wire Using library Adafruit_LiquidCrystal at version 1.0.0 in folder: /Users/dyim/Documents/Arduino/libraries/Adafruit_LiquidCrystal Using library DHT_sensor_library at version 1.2.3 in folder: /Users/dyim/Documents/Arduino/libraries/DHT_sensor_library exit status 1 'D4' was not declared in this scope

[mcauser]

D4 is a constant, defined here: https://github.com/esp8266/Arduino/blob/master/variants/d1_mini/pins_arduino.h

The ESP8266 GPIO pins do not always line up with development board pin names. D4 == GPIO2

Try replacing D4 with 2

[pb-dyim]

Thanks everything is working now.

From: Mike Causer [email protected] Reply-To: wemos/D1_mini_Examples [email protected] Date: Friday, July 8, 2016 at 11:39 PM To: wemos/D1_mini_Examples [email protected] Cc: David Yim [email protected], Author [email protected] Subject: Re: [wemos/D1_mini_Examples] Error compiling 'D4' was not declared in this scope (#21)

D4 is a constant, defined here: https://github.com/esp8266/Arduino/blob/master/variants/d1_mini/pins_arduino.h

The ESP8266 GPIO pins do not always line up with development board pin names. D4 == GPIO2

Try replacing D4 with 2

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