https://www.arduino.cc/ - Arduino
https://ruff.io/ - Ruff.io
https://www.raspberrypi.org/ - Raspberry Pi - Teach, Learn, and Make with Raspberry Pi
http://www.rock-chips.com/ - Rockchip-瑞芯微电子股份有限公司
https://www.espressif.com/ - Espressif Systems - Wi-Fi and Bluetooth chipsets and solutions
http://www.t-firefly.com/ - Firefly | 让科技更简单，让生活更智能