CYD ESP32-2424S012

Development Board

Code name: CYD_ESP32_2424S012

CYD ESP32-2424S012 is a development board based on the ESP32C3 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 32Mbit flash memory.

About CYD ESP32-2424S012

🚀 The CYD ESP32-2424S012 is a budget-friendly ESP32-based development board, commonly referred to as a Cheap Yellow Display (CYD). It features integrated WiFi, Bluetooth 4.2, and a range of I/O interfaces, making it an excellent choice for affordable IoT and embedded display projects. ⚡

📡 With support for 802.11 B/G/N WiFi and Bluetooth 4.2 (BLE), this board is well-suited for wireless applications.

💾 Equipped with 32Mbit SPI Flash, multiple ADC, DAC, I2C, SPI, UART, PWM, and I2S interfaces, it offers a versatile platform for various embedded projects.

Where to Buy CYD ESP32-2424S012

Starting from

$20 per unit

Amazon.de Ships to EU

View Price

AliExpress Best value

View Price

Prices are subject to change. We earn from qualifying purchases as an Amazon Associate.

Technical Specifications

Complete technical specification details for CYD ESP32-2424S012

Display

Type None

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32c3

Clock Speed 240 MHz

Flash Size 32Mbit

PSRAM None

Architecture xtensa

✨ Features & Pins

Digital IO 21

Analog Input 6

PWM 14

Interrupts 22

Download Full Datasheet

Quick Setup

Copy-paste configs for CYD ESP32-2424S012 - auto‑generated from this board's exact hardware specs.

ESP32C3 240 MHz 32Mbit DIO Xtensa

In Arduino IDE 2 select Cyd Esp32 2424s012 from the esp32 by Espressif package. In PlatformIO use board = esp32-c3-devkitm-1. ESP32C3 · 240 MHz · 32Mbit · DIO.

Tools menu settings

Board (select in Arduino IDE) Cyd Esp32 2424s012

CPU Frequency 240 MHz

Flash Size 32Mbit

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Cyd Esp32 2424s012" for the CYD ESP32-2424S012.

platformio.ini


[env:cyd-esp32-2424s012]
platform  = espressif32
board     = esp32-c3-devkitm-1
framework = arduino

; Exact hardware config for CYD ESP32-2424S012
board_build.mcu        = esp32c3
board_build.f_cpu      = 240000000L
board_build.flash_size = 32Mbit
board_build.flash_mode = dio
board_upload.flash_size = 32Mbit

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-c3-devkitm-1
  framework:
    type: arduino   # or "esp-idf"

# CYD ESP32-2424S012 - 240 MHz ESP32C3
# Flash: 32Mbit | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32c3 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 32Mbit \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

CYD ESP32-2424S012 Board Dimensions

Physical measurements for CYD ESP32-2424S012

CYD ESP32-2424S012 dimensions - height, width

Width 37.0mm

Length 38.5mm

CYD ESP32-2424S012 Pinout Diagram

Complete pin reference for CYD ESP32-2424S012

Safe Pins to Use

These pins are safe for general GPIO usage without boot or system conflicts

IO1

IO3

IO22

Why Are These Pins Safe?

✓ No boot sequence involvement

✓ No flash/PSRAM connections

✓ No USB or JTAG conflicts

✓ Freely assignable without issues

Pins to Avoid or Use with Caution

Reserved for critical functions. Misuse may cause boot failures, programming issues, or system conflicts.

Strapping Pins

Boot behavior & flash voltage

JTAG Debugging

Low-level debugging interface

USB Pins

USB Serial/JTAG communication

Flash/SPI Pins

Memory & PSRAM connections

UART Serial

Debugging & firmware uploads

PIN	Label	Why Avoid	Type
IO2	GPIO2	Must be held high during boot (if low on reset, normal flash boot may fail)	🛠️ Strapping
IO16	SPID	Used for SPI flash data transfer (data-out from flash); not available for other functions	⚡ Flash
IO17	SPIQ	Used for SPI flash data transfer (data-in to flash); not available for other functions	⚡ Flash
IO18	USB_D-	By default connected to on-chip USB Serial/JTAG controller; to use as GPIO it must be reconfigured from its USB function	🔌 USB
IO19	USB_D+	By default connected to on-chip USB Serial/JTAG controller; not available for GPIO use unless USB functionality is disabled or remapped	🔌 USB
IO21	U0TXD	Used as UART0 transmit (console/bootloader); repurposing may disable serial console output and printing	📡 UART

Useful Links

Datasheets and resources for CYD ESP32-2424S012

Board Datasheet

Technical specifications

ESP32C3 Datasheet

Microcontroller reference

CYD ESP32-2424S012 Custom Pin Mapping

Pin configuration and GPIO mapping for CYD ESP32-2424S012

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Function	ESP Pin	I/O Type	Description
1	3V3	3.3V	POWER OUTPUT	3.3V power output
2	GND	GND	POWER GROUND	Ground connection
3	5V	5V	POWER INPUT	5V power input
4	IO1	GPIO1	BIDIRECTIONAL	GPIO, ADC, I2C
5	IO2	GPIO2	BIDIRECTIONAL	GPIO, ADC
6	IO3	GPIO3	BIDIRECTIONAL	GPIO, ADC
7	IO16	SPI_CS	BIDIRECTIONAL	GPIO, SPI Chip Select
8	IO17	SPI_D	BIDIRECTIONAL	GPIO, SPI Data
9	IO18	SPI_CLK	BIDIRECTIONAL	GPIO, SPI Clock
10	IO19	SPI_Q	BIDIRECTIONAL	GPIO, SPI Q
11	IO21	UART_TX	OUTPUT	GPIO, UART TX
12	IO22	UART_RX	INPUT	GPIO, UART RX

Legend

Function Pin role

GPIO ESP32 pin

I/O Direction

# Pin number

Default Tools & Configuration

Build and upload settings for CYD ESP32-2424S012

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	qio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)