Arduino library to make it easy to use buttons on Wemos and other ESP8266-based boards
Download and put WemosButton-folder + files in Arduino/Libraries
Include the library in your sketch with
#include "WemosButton.h"The pins on the Wemos-boards can be used without external pull up resistors in the following modes:
- pinMode(Dx,INPUT_PULLUP), x=1, 2, 3, 4, 5, 6, 7, active low (pull up on chip)
- pinMode(Dx,INPUT), x=3,4 active low (pull up on board)
- pinMode(Dx,INPUT), x=8 active high (pull down on board)
- pinMode(Dx,INPUT_PULLDOWN_16), x=0, active high (pull down on chip)
- Pin D1 and D2 are used with the OLED display and can not be used as inputs together with OLED display
- Pin D4 is connected to BUILTIN_LED and can be used but will make the LED flash when the button is pressed
This leaves pins D3, D5, D6 and D7 available for INPUT_PULLUP without affecting OLED or BUILTIN_LED. D0 and D8 can be used with INPUT_PULLDOWN_16 and INPUT respectively if additional inputs are needed
There are two methods, readButton() and readButtonAdvanced() that are available. readButton() is the simple one that only detects when a button is pressed. readButtonAdvanced() also detects when a button is released and held pressed for a configurable time, or double clicked. See examples for more info.
If WEMBUT_DEBUG is defined TRUE in WemosButton.h, the serial monitor can be used to emulate button presses (just simple press, not hold nor double click). Enter digit 0 to 8 and send to emulate button D0 to D8 being pressed.