This isn’t an ESP8266 shield, either: you can write code for the ESP module, connect the serial pins, and hit the program button. The basic functions of the Arduino IDE – pinMode, digitalRead ...

It detects it, but it can't determine what it is. That is quite common for boards like the esp8266 that require a button push or special programming mode. ... ~/Arduino/myBlinky $ arduino-cli compile ...

A single momentary push button represents the device’s sole user input, ... [WhisleyTangoHotel] wraps up his blog post by providing his ESP8266 Arduino source code, ...

My daughter likes buttons. She's learning letters. I was bored over winter break and had these parts laying around... so I built her a "Button Box" based around an Arduino. Open source, hackable ...