The ESP-C3-13U-2M with Module WiFi Modules ROHS manufactured by Ai-Thinker is a WiFi module designed for low power consumption and short range, high speed communication. It is an ultra-low-power, highly integrated Wi-Fi SoC integrating an ATmega328 processor with an ESP8266 2.4 GHz Wi-Fi radio, two UARTs, SPI, and I2C interfaces into a single IC. The module also has a 2MBytes of SPI flash memory that can be used for data storage. It supports IEEE 802.11 b/g/n data rates of up to 54 Mbps and possesses features such as WEP, WPA/WPA2, WAPI security, FreqHop scheduling, and low-power management. The module can also be used to develop location based services and cloud connected applications. It has maximum output power of 13 dBm with integrated PCB antenna, and is fully RoHS compliant.