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ESP32-C3-WROOM-02U-N4

ESP32-C3-WROOM-02U-N4

Espressif Systems
Bluetooth, WiFi 802.11b/g/n, Bluetooth v5.0 Transceiver Module 2.4GHz Antenna Not Included, U.FL Surface Mount
Active1,472 in stock
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Overview

The ESP32-C3-WROOM-02U-N4 is a compact, single-core RISC-V Wi-Fi and Bluetooth 5 (LE) module designed for cost-effective IoT applications. It features 4MB of embedded SPI flash and an U.FL connector for applications requiring an external antenna to optimize signal range or clear metal enclosures. The module operates at 160 MHz and provides a modern open-source architecture with a rich set of peripherals including SPI, I2C, and TWAI.

Why Choose This Part

This module provides a seamless migration path to the RISC-V architecture while maintaining compatibility with the well-established ESP-IDF ecosystem. Its 20.5dBm peak output power and -98dBm sensitivity ensure robust wireless performance, and the U.FL connector offers flexibility for external antenna placement in space-constrained designs.

Applications

Smart Lighting Controllers
Utilizes the 2.4GHz Wi-Fi and Bluetooth mesh capabilities for synchronized control of residential and industrial lighting systems.
Industrial IoT Gateways
The U.FL connector allows for external high-gain antennas to maintain reliable communication in harsh RF environments or metal control cabinets.
Environmental Monitoring
Low-power modes, including a 5uA standby current and 1uA shutdown mode, make it suitable for battery-powered sensor nodes.
Secure Home Automation
Integrates hardware security features and secure boot to protect sensitive user data in smart appliances and security systems.

Key Specifications

Protocol 802.11b/g/n, Bluetooth v5.0
Data Rate 150Mbps
Frequency 2.4GHz
Memory Size 4MB Flash, 384kB ROM, 408kB SRAM
Sensitivity -98dBm
Antenna Type Antenna Not Included, U.FL
Mounting Type Surface Mount
Package / Case 19-SMD Module
Power - Output 20.5dBm
Voltage - Supply 3V ~ 3.6V
Serial Interfaces ADC, GPIO, I2C, I2S, SPI, JTAG, PWM, UART, USB
RF Family/Standard Bluetooth, WiFi
Utilized IC / Part ESP32-C3
Current - Receiving 82mA ~ 84mA
Operating Temperature -40degC ~ 105degC (TA)
Current - Transmitting 280mA ~ 345mA

Getting Started

Developers can use the Espressif IoT Development Framework (ESP-IDF) or the Arduino IDE with the ESP32 board manager installed. The module features an integrated USB Serial/JTAG controller, simplifying debugging and firmware flashing without requiring external USB-to-UART bridge ICs. For prototyping, the ESP32-C3-DevKitM-1 serves as an ideal hardware platform.

Dev Boards

Development boards and breakout modules featuring the ESP32-C3-WROOM-02U-N4 or compatible chips — ready to use for prototyping.

ESP32-C3-DEVKITC-02U Espressif Systems
The ESP32-C3-DEVKITC-02U transceiver evaluation board by Espressif Systems is a development tool designed for RF, RFID,
Digi-Key 123 in stock
ESP32-C3-DEVKITM-1-N4X Espressif Systems
Multiprotocol Development Tools ESP32-C3-DevKitM-1 is an entry-level development board equipped with ESP32-C3-MINI-1 or
Digi-Key Mouser 657 in stock
ESP32-C3-MINI-1 ESP32-C RISC-V MCU 32-Bit 802.11 b/g/n (WiFi/WLAN/Wi-Fi 4), Bluetooth® 5.x (BLE) 2.4GHz Embedded Evaluat
Digi-Key 95 in stock
ESP32-C3-DevKitM-1 Espressif
Lower-cost Espressif dev kit with BLE and Wi-Fi capabilities if Wi-Fi 6 or 802.15.4 are not required.
Digi-Key 213 in stock
The ESP32-C3-AWS-EXPRESSLINK-DEVKIT evaluation board from Espressif Systems is designed for a wide range of RF, RFID, a
Digi-Key Mouser 2 in stock
Part of Espressif ESP32 SoCs family » ESP32-C3

ESP32-C3 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Memory Package Interfaces Sensitivity Antenna Type Utilized IC / Part Stock
ESP32-C3-WROOM-02U-N4 (this part) 4MB SMD-19 ADC, GPIO, I2C, I2.. -98dBm Antenna Not Includ.. C3-32 1,472
ESP32-C3-WROOM-02-N4 4MB SMD-19 GPIO, I2C, I2S, SP.. -105dBm PCB Trace C3-32 16,703
ESP32-C3-WROOM-02-H4 4MB SMD-32 GPIO, I2C, I2S, SP.. -105dBm PCB Trace C3-32 1,312
ESP32-C3-MINI-1-N4X 4MB SMD-61 ADC, GPIO, I2C, I2.. -104dBm Integrated, Trace C3FH4-32 2,439
ESP32-C3-DEVKITM-1-N4X — — — — — C3-32 657
ESP32-C3-DEVKITC-02U — — — — — C3-32 123
ESP32-C3-MINI-1U 4MB SMD-61 ADC, GPIO, I2C, I2.. -104dBm Antenna Not Included C3FH4-32 3,117
ESP32-C3-AWS-ExpressLink-DevKit — — — — — C3-32 2
ESP32-C3-WROOM-02 4MB SMD-19 GPIO, I2C, I2S, SP.. -105dBm PCB Trace C3-32 6,393
ESP32-C3-WROOM-02U 4MB SMD-19 ADC, GPIO, I2C, I2.. -98dBm Antenna Not Includ.. C3-32 6,383
Also available as: ESP32-C3-MINI-1-N8

Also Consider

ESP32-C3-WROOM-02-N4 Espressif Systems - Identical module but features an integrated PCB trace antenna for designs not requiring an external antenna connector.
ESP32-WROOM-32E-N4 Espressif Systems - Provides a dual-core Xtensa architecture with higher processing power and legacy Bluetooth Classic support if needed.

Categories

Wireless & Connectivity > WiFi Modules