The ESP-C3-M1 (C3FH4) is a WiFi module manufactured by A-Thinker. It is a cost-effective wireless WiFi module that complies with the 2.4 GHz IEEE 802.11b/g/n standards, featuring low power consumption and high performance. It supports a variety of serial communication protocols such as SPI/SDIO/UART/I2C. This module is RoHS compliant and includes an on-board antenna, RF power amplifier, power management, inter-stage matching circuit, lightning protection, and temperature sensing. It is also capable of transmitting up to 150Mbps data rate with a range of up to 300 meters. This module is ideal for applications such as home automation, connected lighting, and various IoT solutions.