MAJOR LAUNCH: HUSKYLENS 2 6 TOPS LLM MCP AI Vision Sensor is now available. Buy Now →







Upgrade IoT projects with the ESP32-C3-WROOM-02-N4—a compact, high-performance WiFi & Bluetooth LE module. Featuring a 32-bit RISC-V processor, 4MB flash, and ultra-low power consumption, this module is perfect for smart homes, industrial automation, and wearable tech.
Powerful RISC-V Core
Built with a 160MHz single-core RISC-V processor, delivering efficient performance for real-time IoT applications.
Dual Connectivity (WiFi & BLE)
Supports WiFi 4 (802.11 b/g/n) and Bluetooth 5.0 LE, enabling seamless wireless communication in smart devices.
Compact & Energy-Efficient
With 400KB SRAM and 4MB flash, this module balances high storage and ultra-low power for battery-operated devices.
Rich Peripheral Support
Includes UART, I2C, SPI, PWM, ADC, and USB for flexible hardware integration across various projects.
Pinout of ESP32-C3-WROOM-02-N4 Module (PCB antenna)
Pin Description
| Name | No. | Type | Function |
| 3V3 | 1 | P | Power supply |
| EN | 2 | I | High: on, enables the chip. |
| Low: off, the chip powers off. | |||
| Note: Do not leave the EN pin floating. | |||
| IO4 | 3 | I/O/T | GPIO4,ADC1_CH4,FSPIHD,MTMS |
| IO5 | 4 | I/O/T | GPIO5,ADC2_CH0,FSPIWP,MTDI |
| IO6 | 5 | I/O/T | GPIO6,FSPICLK,MTCK |
| IO7 | 6 | I/O/T | GPIO7,FSPID,MTDO |
| IO8 | 7 | I/O/T | GPIO8 |
| IO9 | 8 | I/O/T | GPIO9 |
| GND | 9,19 | P | Ground |
| IO10 | 10 | I/O/T | GPIO10,FSPICS0 |
| RXD | 11 | I/O/T | GPIO20,U0RXD |
| TXD | 12 | I/O/T | GPIO21,U0TXD |
| IO18 | 13 | I/O/T | GPIO18,USB_D- |
| IO19 | 14 | I/O/T | GPIO19,USB_D+ |
| IO3 | 15 | I/O/T | GPIO3,ADC1_CH3 |
| IO2 | 16 | I/O/T | GPIO2,ADC1_CH2,FSPIQ |
| IO1 | 17 | I/O/T | GPIO1,ADC1_CH1,XTAL_32K_N |
| IO0 | 18 | I/O/T | GPIO0,ADC1_CH0,XTAL_32K_P |