search

wemos / D1_mini_Examples

WeMos D1 & D1 mini Arduino Examples
547 stars 228 forks source link

Error compiling 'D4' was not declared in this scope #21

Open pb-dyim opened 8 years ago

pb-dyim commented 8 years ago

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 commented 8 years ago

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 commented 8 years ago

Thanks everything is working now.

From: Mike Causer notifications@github.com Reply-To: wemos/D1_mini_Examples reply@reply.github.com Date: Friday, July 8, 2016 at 11:39 PM To: wemos/D1_mini_Examples D1_mini_Examples@noreply.github.com Cc: David Yim dyim@pacificbiosciences.com, Author author@noreply.github.com 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

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/wemos/D1_mini_Examples/issues/21#issuecomment-231514815, or mute the threadhttps://github.com/notifications/unsubscribe/ADN3DPPivQORKMO9KsvT7gWOR54caApfks5qTyXugaJpZM4JIiW1.