Grove - UART WiFi is a serial transceiver module featuring the ubiquitous ESP8266 IoT SoC. With integrated TCP/IP protocol stack, this module lets your microcontroller interact with WiFi networks with only a few lines of code. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning you can send simple text commands to control the device. The SoC features integrated WEP, WPA/WPA2, TKIP, AES, and WAPI engines, can act as an access point with DHCP, can join existing WiFi networks and has configurable MAC and IP addresses.

Features

Grove 4-pin connector (RX,TX,VCC,GND)
802.11 b/g/n protocol (2.4GHz)
WiFi Direct (P2P), soft-AP
Supports three modes: AP, STA and AP+STA coexistence mode
Integrated TCP/IP protocol stack
LwIP (lightweight IP)
Integrated low power 32-bit CPU could be reprogrammed as an application processor
Integrated temperature sensor
Serial UART Interface
Multi-queue QoS management
Wake up and transmit packets in < 2ms
Metal shielding
Onboard ceramic antenna
Reset switch

Specification

Input voltage: 3V / 5V
Baud Rate: 115200
Based on ESP8266 ESP-07 SoC
AT Firmware: esp_iot_sdk_v1.1.0 + Seeed modifications:
2x additional AT commands to control blue Link LED.
Register red WiFi LED to the ESP8266 wifi state LED.
AT command set
SDIO 1.1/2.0, SPI, UART
Five power states: OFF, DEEP_SLEEP, SLEEP, WAKEUP and ON.
Standby power consumption of < 1.0mW (DTIM=3)
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
Hardware accelerators for CCMP (CBC-MAC, counter mode), TKIP (MIC, RC4), WAPI (SMS4), WEP (RC4), CRC
WPA/WPA2 PSK, and WPS driver
A-MPDU & A-MSDU aggregation & 0.4ms guard interval
Dimensions: 25.43mm x 20.35mm