Recently we get the ESP32 modules.
It is another revolutionary tool that invented in China! (chip design and SDK)
CPU 240MHZ, the computational capability can compare to 600DMIPS dual-core.
WIFI, BLE, ETHERNET, SRAM 520K！！
That is quite amazing, if it can run openwrt that could be a killer in the whole industry.
The price is just 6USD!!!