Its small form factor allows you to keep it on a keychain and so you can bring your ESP8266 everywhere; hence the name. It has a small connector that allows you to access 5 GPIOS, and one ADC pin.

The ESP8266 is the reigning WiFi wonderchip, quickly securing its reputation as the go-to platform for an entire ecosystem of wireless devices. There’s nothing that beats the ESP8266 on a cap… ...

The ESP8266 works but is not a completely natural fit for an audio baby monitor, as it lacks a quality ADC and DAC. But on the other hand it is cheap, it is easy to use, and it has plenty of ...