Base on https://store.particle.io/
use the photon to make a simple demo .
Particle Photon $19
The Photon is a $19 tiny Wi-Fi development kit for creating connected projects and products for the Internet of Things. It's easy to use, it's powerful, and it's connected to the cloud.
The tools that make up the Photon's ecosystem (and come along with the board) are designed to let you build and create whether you're an embedded engineer, web developer, Arduino enthusiast or IoT entrepreneur. You'll be able to write your firmware in our web or local IDE, deploy it over the air, and build your web and mobile apps with ParticleJS and our Mobile SDK.
The board itself uses a Broadcom wi-fi chip (one that can be found in Nest Protect, LIFX, and Amazon Dash) alongside a powerful STM32 ARM Cortex M3 microcontroller. It's like the Spark Core. But better.
Does not ship with breadboard or USB cable.
Particle P0 Wi-Fi module
Broadcom BCM43362 Wi-Fi chip
STM32F205 120Mhz ARM Cortex M3
1MB flash, 128KB RAM
Soft AP setup
Full specs here