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ESP32-C3-WROOM-02 is a universal Wi-Fi and low-power Bluetooth LE module. The rich set of peripherals and small size make the two modules an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc.
ESP32-C3-WROOM-02-N4 is equipped with ESP32-C3* chip and equipped with 4 MB embedded flash, belonging to esp32-C3 series chip. ESP32-C3 series of chips have a 32-bit RISC-V single-core processor. They integrate a rich set of peripherals, ranging from UART, I2C, I2S, remote control peripheral, LED PWM controller, general DMA controller, TWAI® controller, USB Serial/JTAG controller, temperature sensor, and ADC. It also includes SPI, Dual SPI, and Quad SPI interfaces.
Pin Layout
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 |
