The ESP32-S2-WROOM-I(4MB) is a Wi-Fi module manufactured by Espressif which integrates 4 megabytes (MB) of flash memory, an SMD42,18x31x3.3 RoHS compliant low power consumption Wi-Fi transceiver, an integrated dual-mode Bluetooth radio, and other serial communication protocols. It supports 802.11 b/g/n protocol and has a strong adjustable power amplifier, makes it ideal for a variety of embedded applications requiring both Wi-Fi and Bluetooth connectivity. This module also has a built-in integrated temperature sensor, providing an added layer of knowledge to the data the device receives and transmits. Additionally, its low-power sleep mode enables long battery life, making it a great choice for IoT applications.