*Model: ESP-09.
*ESP-09:Ultra small packaging as 10*10mm. 4 layer technology, 1M byte.
*It run LWIP.
*802.11 bgn.
*WIFI Direct (P2P), SOFT-AP.
*Built-in TCP/IP.
*The AT command is perfect, efficient, concise.
*Support three modes: AP, STA and AP+STA coexistence mode.