Yes
No
N/A
CYD ESP32-2424S012
ESP32-C3 board with 1.2" LCD - compact UI-ready board for smart devices, wearables, or sensor dashboards.
38.5 × 37 mm
ESP32-C3
RISC-V MCU
160MHz
clock
4MB
flash
400KB
SRAM
2· Two 12-bit, 6 Channels ADC
GPIO
BLE 5.0+ WiFi
radio
Pinout
6 pins
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | - | 3V33.3V | power | - | 3.3V rail on the JST-SH 1.0mm UART programming connector |
| 2 | - | GND | ground | - | Ground on the JST-SH 1.0mm UART programming connector |
| 3 | 21 | TXIO21U0TXD | uart | uart | UART0 TX on the JST-SH programming connector; shared with the serial console |
| 4 | 20 | RXIO20U0RXD | uart | uart | UART0 RX on the JST-SH programming connector; shared with the serial console |
| 5 | - | BAT+VBAT | power | - | 3.7V LiPo input on the JST 1.25mm battery connector (via IP5306) |
| 6 | - | GND | ground | - | Ground on the JST 1.25mm battery connector |
Fine - with a little care
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| TX | U0TXD | Used as UART0 transmit (console/bootloader); repurposing may disable serial console output and printing | UART |
| RX | U0RXD | Used as UART0 receive (console/bootloader); repurposing may disable serial programming and debug logs | UART |
These are recommendations, not hard rules - with the right pull-ups, timing and boot-state awareness most pins can be made to work. When in doubt, start green.
Pinout notes The CYD ESP32-2424S012 breaks out 6 pins in total: 2 GPIO for your project, with 3V3 , GND and BAT+ handling power. Peripheral wiring is straightforward: TX /…
The CYD ESP32-2424S012 breaks out 6 pins in total: 2 GPIO for your project, with 3V3, GND and BAT+ handling power.
Peripheral wiring is straightforward: TX/RX on GPIO21 and GPIO20 cover serial logging and flashing.
2 of the exposed pins carry boot-time or system duties on the ESP32-C3 (TX and RX) - check the guidance above before wiring anything to them.
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Native USB - shows up as a port right away, no driver needed. Not detected? Hold BOOT while plugging in.
2
Match & flash
Set the Tools options shown, then click Upload.
3
Verify it runs
The onboard LED on GPIO8 blinks - swap the pin if your board's LED differs.
Set these in Tools · leave everything else at default
Arduino IDE 2.x — Tools Copy
Board: "ESP32C3 Dev Module"▸
USB CDC On Boot: "Enabled"▸
Flash Size: "4MB (32Mb)"▸
Flash Mode: "DIO"▸
Partition Scheme: "Default 4MB with spiffs (1.2MB APP / 1.5MB SPIFFS)" (default)▸
Upload Speed: "921600"▸
▸ every other Tools option — leave at default
Board: ESP32C3 Dev Module USB CDC On Boot: Enabled Flash Size: 4MB (32Mb) Flash Mode: DIO Partition Scheme: Default 4MB with spiffs (1.2MB APP / 1.5MB SPIFFS) Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP32 Arduino ▸ ESP32C3 Dev Module
// blink the onboard LED
void setup() {
pinMode(8, OUTPUT);
}
void loop() {
digitalWrite(8, HIGH); delay(500);
digitalWrite(8, LOW); delay(500);
}board to selectesp32-c3-devkitm-1⧉ copy
[env:cyd-esp32-2424s012]
platform = espressif32
board = esp32-c3-devkitm-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600Find it: PlatformIO Home ▸ Boards, search
esp32-c3-devkitm-1 — or type it after board =.board to selectesp32-c3-devkitm-1⧉ copy
esp32:
board: esp32-c3-devkitm-1
variant: cyd_esp32_2424s012
framework:
type: esp-idf
# blink - GPIO8
output:
- platform: gpio
pin: 8
id: led_out
light:
- platform: binary
name: "LED"
output: led_outFind it: search ESPHome's board list for
esp32-c3-devkitm-1 (same ids as PlatformIO).esptool doesn't pick board settings — a prebuilt .bin already has them baked in. This is just the raw flash command.
esptool.py --chip esp32c3 --port /dev/ttyACM0 \
--baud 921600 write_flash 0x0 firmware.bin--port = your /dev/tty* (macOS/Linux) or COMx (Windows).Build details: sketch space 1310720 B · data 327680 B · DIO
Specifications
ESP32-C3 · 38.5 × 37 mmCompute
MCU
ESP32-C3 · RISC-V
Clock
160 MHz
SRAM · Flash
400 KB · 4MB
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
5.0 LE
Antenna
u.FL
I/O
GPIO · ADC
2 · Two 12-bit, 6 Channels
UART · I²C · SPI
2 · 1 · 3
PWM
6 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x0
Display
Screen
Round TFT · 1.28" · 240x240
Driver
GC9A01
Touch
CST816D
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
DIO · QIO
Sketch · Data
1.25 MB · 320 KB
38.5 × 37 mm
The CYD ESP32-2424S012 uses esptool_py for firmware uploads, esp_ota for over-the-air (OTA) updates. Flash mode is DIO with QIO boot mode. The maximum sketch size is 1.25 MB with 320 KB available for data.
About this board
At 38.5 × 37 mm it's the smallest CYD board we've measured.
Inside sits the ESP32-C3 - a single-core RISC-V and the budget low-power pick. Sibling CYD boards cover the ESP32-S3 and ESP32, so you can change radios or horsepower without changing the footprint.
It's the only ESP32-C3 option in the CYD family.
The $20.00 price tag is typical for a CYD board.
Around the module: a Round TFT 1.28" 240x240 display with touch, battery charging (IP5306) via JST 1.25mm and Reset/Boot/Power buttons.
It flashes over native USB - no serial-converter driver needed, which isn't a given among CYD boards.
Where to buy
prices are typical street pricesAs an Amazon Associate, ESPboards earns from qualifying purchases.
Resources
Board datasheet mikroshop.ch↗ ESP32-C3 datasheet espressif.com↗ CNX Software review (ESP32-2424S012) cnx-software.com↗Hardware teardown (CircuitDigest) circuitdigest.com↗openHASP ESP32-2424S012 hardware page openhasp.com↗HomeDing ESP32-2424S012 board notes homeding.github.io↗CircuitPython Sunton ESP32-2424S012 pin map (TX=GPIO21, RX=GPIO20) circuitpython.org↗rzeldent PlatformIO Sunton board definitions (ESP32-2424S012C) github.com↗
Similar boards
All Cyd boards →
