The ESP32-C3-WROOM-02-N4 is a Multiprotocol Module manufactured by Espressif. It features an ESP32-C3 processor with a 4MB SPI flash, PCB antenna, -40 C +85 C operating temperature and is in an SMD module package. The processor is a low-power SoC with a Xtensa® 32-bit LX6 dual-core processor clocked at up to 240MHz and a Wi-Fi RF transceiver supporting 802.11 a/b/g/n/d/h/i/j/k/r/ac WLAN protocol, Bluetooth Low Energy and NFC. Additionally, the processor features a 16MB external RAM, digital signal processor, and embedded temperature sensor. The PCB antenna supports both 2.4GHz and 5GHz Wi-Fi frequencies, allowing for extended range and higher throughput. The SPI flash memory can be easily configured to store application data and run in-application code.