WeMos D1 Mini Button Shield

This shield (marked 1-BUTTON Shield V2.0.0) carries a push button and plugs onto an ESP8266 WeMos D1 mini. When pressed, the button pulls pin D3 to GND. The pin headers are not soldered and can be fitted as required.

Recommended Accessories:

• WeMos D1 mini ESP8266 NodeMcu Lua Board

Features:

• Button between D3 (GPIO0) and GND
• Activate the internal pull-up resistor to read it: pinMode(D3, INPUT_PULLUP)
• Pressed = LOW, not pressed = HIGH
• D3 determines the boot mode: do not press the button at power-up or reset

Application Examples:

• IoT applications with one button
• Simple input for projects with the D1 mini

Documentation:

• 1-Button Shield at the manufacturer LOLIN
• Arduino example 1-Button Shield (GitHub)
• ESP8266 pinout and GPIO reference (Random Nerd Tutorials)

Technical Data:

• Button on: D3 (GPIO0) to GND
• Color: blue
• Dimensions: 28 × 25 × 9 mm
• Weight: 4 g

Scope of Delivery:

• 1× Button Shield
• 2× Pin header male (8-pin)