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CYD ESP32-8048S070
A larger 7.0-inch display version of the CYD ESP32-S3 development board, ideal for complex user interfaces.
181 × 108 mm
ESP32-S3
MCU
240MHz
clock
16MB
flash
512KB
SRAM
9· 7 ADC
GPIO
BLE 5.0+ WiFi
radio
Pinout
12 pins
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | - | 5V | power | - | 5V input on the P1 UART header and the 4P power connector |
| 2 | - | 3V33.3V | power | - | 3.3V rail on the P4/P5 extended-IO headers |
| 3 | - | GND | ground | - | Ground, broken out on the P1, P4 and P5 headers |
| 4 | 43 | TXIO43U0TXD | strapping | uart | UART0 TX on the P1 programming header; shared with the CH340C serial console |
| 5 | 44 | RXIO44U0RXD | strapping | uart | UART0 RX on the P1 programming header; shared with the CH340C serial console |
| 6 | 11 | IO11MOSI | strapping | adc · spi | SPI MOSI on the P2 header; shared with the onboard microSD card |
| 7 | 12 | IO12SCLK | strapping | adc · spi | SPI SCLK on the P2 header; shared with the onboard microSD card |
| 8 | 13 | IO13MISO | strapping | adc · spi | SPI MISO on the P2 header; shared with the onboard microSD card |
| 9 | 19 | IO19SDA | uart | adc · i2c | I2C SDA on the P2/P3 headers; shared with the GT911 touch controller |
| 10 | 20 | IO20SCL | uart | adc · i2c | I2C SCL on the P3 header; shared with the GT911 touch controller |
| 11 | 18 | IO18I2S_LRCLKCTP_INT | safe | adc | MAX98357 I2S word-select and GT911 touch-interrupt net; broken out on the P3/P4/P5 headers |
| 12 | 17 | IO17I2S_DIN | safe | adc | MAX98357 I2S audio data; broken out on the P3/P4/P5 headers |
Start with these
2 pins with no boot or system involvementIO18I2S_LRCLKIO17I2S_DIN
Freely assignable - no strapping, flash, USB or JTAG duties. Ideal first picks for buttons, sensors and LEDs.
Fine - with a little care
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| TX | U0TXD (GPIO43) | Used for bootloader output and UART console logs. If repurposed, you will lose the default serial output (and programming via UART0). | Other |
| RX | U0RXD (GPIO44) | Used for bootloader input (download mode via serial). If repurposed, you cannot use the default UART0 download mode for programming the chip. | Other |
| IO11 | FSPID | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet lists it as a priority-2 pin ("can be freely used without restrictions"), so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| IO12 | FSPICLK | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet lists it as a priority-2 pin ("can be freely used without restrictions"), so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| IO13 | FSPIQ | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet lists it as a priority-2 pin ("can be freely used without restrictions"), so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| IO19 | USB_D- | By default connected to the on-chip USB Serial/JTAG controller. Using it as general GPIO without reconfiguring IO MUX will interfere with USB functionality. | USB |
| IO20 | USB_D+ | By default connected to the on-chip USB Serial/JTAG controller. Using it as general GPIO without reconfiguring IO MUX will interfere with USB functionality. | USB |
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 ESP32-8048S070 pinout brings out 12 pins - 9 usable GPIO alongside the 5V, 3V3 and GND power rails. Peripheral wiring is straightforward: I²C is mapped…
The CYD ESP32-8048S070 pinout brings out 12 pins - 9 usable GPIO alongside the 5V, 3V3 and GND power rails.
Peripheral wiring is straightforward: I²C is mapped to SDA on GPIO19 and SCL on GPIO20, while TX/RX on GPIO43 and GPIO44 cover serial logging and flashing.
Beyond plain digital I/O you get 7 ADC-capable pins for sensors and battery monitoring.
5 of the exposed pins carry boot-time or system duties on the ESP32-S3 (TX, RX, IO11 and 2 more) - check the guidance above before wiring anything to them. IO18 and IO17 are free of any such role - the safest first picks.
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Install your USB-serial driver (CH340 / CP210x) if no port appears. Not detected? Hold BOOT while plugging in.
2
Match & flash
Set the Tools options shown, then click Upload.
3
Verify it runs
GPIO18 toggles - wire an LED and resistor to it, or change the pin to your board's own LED.
Set these in Tools · leave everything else at default
Arduino IDE 2.x - Tools Copy
Board: "ESP32S3 Dev Module"▸
Flash Size: "16MB (128Mb)"▸
Flash Mode: "DIO"▸
PSRAM: "OPI PSRAM"▸
Partition Scheme: "16M Flash (3MB APP/9.9MB FATFS)" (default)▸
Upload Speed: "921600"▸
▸ every other Tools option - leave at default
Board: ESP32S3 Dev Module Flash Size: 16MB (128Mb) Flash Mode: DIO PSRAM: OPI PSRAM Partition Scheme: 16M Flash (3MB APP/9.9MB FATFS) Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP32 Arduino ▸ ESP32S3 Dev Module
// toggle GPIO18 - wire an LED and resistor to it
void setup() {
pinMode(18, OUTPUT);
}
void loop() {
digitalWrite(18, HIGH); delay(500);
digitalWrite(18, LOW); delay(500);
}board to selectesp32-s3-devkitc-1⧉ copy
[env:cyd-esp32-8048s070]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600
board_build.arduino.memory_type = qio_opi
build_flags = -DBOARD_HAS_PSRAMFind it: PlatformIO Home ▸ Boards, search
esp32-s3-devkitc-1 - or type it after board =.board to selectesp32-s3-devkitc-1⧉ copy
esp32:
board: esp32-s3-devkitc-1
variant: esp32s3
framework:
type: esp-idf
psram:
mode: octal
speed: 80MHz
# blink - GPIO18
output:
- platform: gpio
pin: 18
id: led_out
light:
- platform: binary
name: "LED"
output: led_outFind it: search ESPHome's board list for
esp32-s3-devkitc-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 esp32s3 --port /dev/ttyACM0 \
--baud 921600 write_flash 0x0 firmware.bin--port = your /dev/tty* (macOS/Linux) or COMx (Windows).Build details: sketch space 3145728 B · data 327680 B · DIO
Specifications
ESP32-S3 · 181 × 108 mm · vs other ESP32 chips →Compute
MCU
ESP32-S3
Clock
240 MHz
SRAM · Flash
512 KB · 16MB · 8MB (OPI) PSRAM
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
5.0 LE
Antenna
PCB
I/O
GPIO · ADC
9 · 7
UART · I²C · SPI
3 · 2 · 2
PWM
8 channels
Power
USB
USB-C
Serial
CH340C
Boot address
0x0
Electrical
Input
5V USB-C
Consumption
-
Regulator
-
Display
Screen
TFT · 7.0" · 800x480
Driver
EK9716
Touch
GT911
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
DIO · QIO
Sketch · Data
3 MB · 320 KB
181 × 108 mm
The CYD ESP32-8048S070 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 3 MB with 320 KB available for data.
About this board
Inside sits the ESP32-S3 - a dual-core Xtensa with vector extensions suited to AI workloads. Sibling CYD boards cover the ESP32-C3 and ESP32, so you can change radios or horsepower without changing the footprint.
At $40.00 it's on the expensive side for a CYD board - most land around $22.
Around the module: 8MB (OPI) PSRAM, a TFT 7.0" 800x480 display with touch, a microSD slot, a speaker connector, an amplifier (MAX98357) and Reset/Boot buttons.
Where to buy
prices are typical street pricesAs an Amazon Associate, ESPboards earns from qualifying purchases.
Resources
Board datasheet laskakit.cz↗ ESP32-S3 datasheet espressif.com↗ ESP3D-TFT Sunton ESP32-8048S070C hardware esp3d.io↗Getting started with the Sunton 7" display, LovyanGFX and LVGL haraldkreuzer.net↗Makerfabs Sunton ESP32-S3 7" 800x480 display product page makerfabs.com↗Sunton smart-display PlatformIO board definitions (rzeldent) github.com↗
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