ESP32-C5 Pinout

Overview

The ESP32-C5 launched after this site’s existing photo and diagram library was put together, so there’s no product photo or illustrated pinout diagram here yet, only verified spec and GPIO tables sourced directly from the official datasheet. It’s Espressif’s first RISC-V chip with dual-band Wi-Fi 6, 2.4 GHz and 5 GHz on the same chip, not just 2.4 GHz like the C6.

Wi-Fi 6, Bluetooth LE and 802.15.4 (Thread and Zigbee) all run at the same time on this chip, like the C6, plus a 5 GHz Wi-Fi band the C6 doesn’t have.

Getting started

Board support for such a new chip can lag behind the official Arduino/ESP-IDF releases, check your installed ESP32 board package version supports the C5 before assuming a problem is your wiring.

Hello World: blink an LED

The microcontroller equivalent of “Hello World”: GPIO23 toggles once a second, shown here in two different environments. Wire an LED (with a resistor) to GPIO23, a plain general-purpose pin with no other job on this chip.

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

#define LED_PIN GPIO_NUM_23

void app_main(void)
{
    gpio_reset_pin(LED_PIN);
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);

    while (1) {
        gpio_set_level(LED_PIN, 1);
        vTaskDelay(pdMS_TO_TICKS(1000));
        gpio_set_level(LED_PIN, 0);
        vTaskDelay(pdMS_TO_TICKS(1000));
    }
}

#define LED_PIN 23

void setup() {
  pinMode(LED_PIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_PIN, HIGH);
  delay(1000);
  digitalWrite(LED_PIN, LOW);
  delay(1000);
}

ESP-IDF: build and flash with idf.py build flash monitor. Arduino IDE: install ESP32 board support first, see “Getting started” above.

Specifications

Official Espressif specifications for the ESP32-C5 chip and the ESP32-C5-WROOM-1 module.

No illustrated dimension diagram or pinout diagram yet, this chip is too new for this site’s asset library, only the verified numbers above. The module has 28 castellated pads at 1.27 mm pitch, same pitch as the WROOM-32D and C6-WROOM-1, but a longer 27.5 mm body.

GPIO quick reference

This is the full chip-level pin list. A specific WROOM-1 board may not break out every one of these to a header pin.

Flashing pins (UART0)

Used by a USB-to-serial adapter (or the onboard one) to upload firmware.

Safety notes