$5.35 each
The ESP8266 WiFi Module is a self contained WiFi module capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. Pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device and get about as much WiFi-ability as a WiFi Shield offers (and that's just out of the box)!

Powerful on-board processing and storage capability allows it to be integrated with the sensors and other application specific devices with minimal development up-front and minimal loading during runtime. The ESP8266 supports APSD for VoIP applications and Bluetooth co-existence interfaces, it contains a self-calibrated RF allowing it to work under all operating conditions, and requires no external RF parts.

Note: The ESP8266 Module can only connnect with 3.3V system directly. If you want to connect it with a 5V system, you need a Logic Level Converter.

· 802.11 b/g/n
· Wi-Fi Direct (P2P), soft-AP
· Integrated TCP/IP protocol stack
· Integrated TR switch, balun, LNA, power amplifier and matching network
· Integrated PLLs, regulators, DCXO and power management units
· +19.5dBm output power in 802.11b mode
· Power down leakage current of <10uA
· Integrated low power 32-bit CPU could be used as application processor
· SDIO 1.1 / 2.0, SPI, UART
· STBC, 1x1 MIMO, 2x1 MIMO
· A-MPDU & A-MSDU aggregation & 0.4ms guard interval
· Wake up and transmit packets in < 2ms
· Standby power consumption of < 1.0mW (DTIM3)
· Dimensions: 24 x 16 x 3.5mm
Spec sheet available in PDF format.
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