ESP-WROOM-5V2L is a Wi-Fi module that supports IEEE802.11b /g/n, integrates the ESP8266EX chip, and can communicate with other devices through the UART interface. It is widely used in smart home devices and remote monitoring devices. The ESP-WROOM-5V2L module uses PCB onboard antenna. The module has a built-in 3.3V LDO regulator and level conversion circuit, and the interface logic voltage can support 5 V/ 3.3V compatibility.