Seeeduino XIAO is a tiny Arduino compatible board based on Microchip's
ARM Cortex-M0+ MCU. Measuring just 2x1.7x0.35 cm, it is low power,
comes with 11 GPIO pins and a big features pack, thus making it almost
perfect for many IoT/WoT projects.
Home Automation is made simple for everyone, with the industrial grade
PRODINo ESP8266 based module. It can be programmed with the Arduino
IDE and allows to control (ON/OFF switch) mains (110-240 VAC) powered
devices such as light bulbs, water pumps, cafe machines or garage doors.