ESP32-C3-WROOM-02 Module - WiFi & BLE 5.0, 4MB Flash, RISC-V Core (PCB antenna)

ESP32-C3-WROOM-02-N4 delivers a compact wireless computing platform designed for modern IoT hardware. Built around the ESP32-C3 architecture, this WiFi and Bluetooth LE communication module integrates a 32‑bit RISC‑V processor, embedded flash memory, and low‑power wireless connectivity inside a small SMT footprint. The wireless microcontroller module combines reliable RF performance with flexible peripheral interfaces, making the embedded networking component suitable for smart home controllers, wearable electronics, industrial sensing nodes, and compact connected devices requiring stable WiFi 4 and Bluetooth 5.0 LE communication.

Efficient RISC‑V Processing Architecture

A 32‑bit single‑core RISC‑V processor running up to 160 MHz forms the computing foundation of this wireless IoT module. The architecture delivers strong real‑time processing capability while maintaining energy efficiency for embedded systems. Integrated memory resources include ROM, SRAM, and RTC SRAM, enabling firmware execution, data buffering, and low‑power operation modes. Such processing capability allows the embedded networking module to handle device control logic, wireless protocol stacks, and sensor data acquisition simultaneously within compact IoT edge devices.

Integrated WiFi 4 and Bluetooth 5.0 LE Connectivity

Dual wireless communication support enables flexible networking across multiple IoT scenarios. The RF module supports WiFi 4 (802.11 b/g/n) for high‑speed data transmission and Bluetooth 5.0 Low Energy for short‑range, energy‑efficient device communication. This dual‑mode wireless capability allows smart device designers to implement cloud connectivity, mobile device pairing, and local mesh communication using a single compact hardware solution, reducing system complexity in smart home nodes, wearable electronics, and industrial monitoring terminals.

Compact Design with Low Power Consumption

A small surface‑mount footprint combined with optimized power management makes this embedded wireless board well suited for space‑constrained and battery‑powered designs. The module integrates 400 KB SRAM and 4 MB embedded flash storage, providing sufficient capacity for firmware, OTA updates, and local data handling. Efficient sleep modes and optimized wireless operation help extend battery life in portable electronics, wireless sensors, and energy‑sensitive IoT endpoints deployed in remote or mobile environments.

Extensive Peripheral Interface Support

Rich peripheral resources enable flexible hardware integration with external components. Supported interfaces include UART, I2C, SPI, PWM, ADC, and USB connectivity through dedicated GPIO functions. These interfaces allow the wireless controller module to communicate with sensors, displays, motor drivers, and other embedded peripherals across a wide range of electronics projects. The versatile GPIO mapping and peripheral flexibility make the compact IoT communication board adaptable for robotics controllers, data acquisition systems, and smart device development platforms.

Figure: Pinout of ESP32-C3-WROOM-02-N4 Module (PCB antenna)

The compact WiFi and BLE communication module supports rapid development of connected electronics including smart home gateways, wireless sensors, industrial monitoring nodes, and wearable devices. Flexible GPIO resources and integrated wireless capability make the embedded controller suitable for IoT prototyping, edge computing nodes, and wireless data acquisition systems requiring reliable connectivity and efficient processing.