ESP8266 is a WIFI Transceiver Module with ultra-low power consumption,User's physical device can be connected to the wi-fi wireless network for Internet or LAN communication and networking functions. It can be widely used in smart power grid, intelligent transportation, intelligent furniture, handheld equipment, industrial control and other fields. Features: Semi-hole chip technology, all the IO leads, with metal shielding shell IPX external antenna, can also be built-in ceramic antenna. Support wireless 802.11b /g/n standard Supports three working modes: STA/AP/STA+AP The built-in TCP/IP protocol stack supports multiple TCP Client connections Supports rich Socket AT instructions Supports UART/GPIO data communication interface Supports Smart Link Smart networking Supports remote firmware upgrade (OTA) The built-in 32-bit MCU can double as application processor Low energy consumption, suitable for battery power supply applications Specification: Module Model ESP8266-07 Main chip ESP8266 Wireless parameters Wireless standards IEEE 802.11b/g/n Frequency range 2.412GHz-2.484GHz Transmission power 802.11b: +16 +/-2dBm (@11Mbps) 802.11g:+14 +/-2dBm (@54Mbps) 802.11n: +13 +/-2dBm (@HT20, MCS7) Receiving sensitivity 802.11b: -93 dBm (@11Mbps ,CCK) 802.11g: -85dBm (@54Mbps,OFDM) 802.11n: -82dBm (@HT20, MCS7) Antenna form External: stamp port External: I-PEX connector, SMA connector Built-in: onboard PCB antenna Hardware parameters Hardware interface UART,IIC,PWM,GPIO,ADC Working voltage 3.3V GPIO drive ability Max:15ma Working current Keep sending=> average:~70mA,peak value: 200mA Normal mode=> Average: ~12mA,peak value: 200mA Standby: