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Deneyap Kart 1A v2
A development board from Deneyap featuring the ESP32-S3, aimed at educational and prototyping purposes.
63.5 × 25.4 mm
ESP32-S3
MCU
240MHz
clock
4MB
flash
512KB
SRAM
29· 9 ADC
GPIO
BLE 5.0+ WiFi
radio
Pinout
30 pins · 2.54 mm pitch| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 0 | GPKEYD15 | strapping | - | |
| 2 | 1 | T7D0CAMD4PWM | safe | touch | |
| 3 | 2 | T8D1CAMD3PWM | safe | touch | |
| 4 | 3 | T5D13PWM | strapping | touch | |
| 5 | 4 | A0T0CAMSDPWM | safe | adc · touch | |
| 6 | 5 | A1T1CAMSCPWM | safe | adc · touch | |
| 7 | 6 | A2T2CAMVPWM | safe | adc · touch | |
| 8 | 7 | A3T3CAMHPWM | safe | adc · touch | |
| 9 | 8 | T4D14PWM | safe | touch | |
| 10 | 9 | A8BATPWM | strapping | adc | |
| 11 | 10 | T6D12PWM | strapping | touch | |
| 12 | 11 | D18SDCSPWM | strapping | - | |
| 13 | 12 | D17SDMOPWM | strapping | - | |
| 14 | 13 | D16SDCKPWM | strapping | - | |
| 15 | 14 | D19SDMIPWM | strapping | - | |
| 16 | 15 | A4PWM0CAMD9PWM | safe | adc | |
| 17 | 16 | A5PWM1CAMXCPWM | safe | adc | |
| 18 | 17 | A6PWM2CAMD8PWM | safe | adc | |
| 19 | 18 | A7PWM3PWM | safe | adc | |
| 20 | 21 | SCLD11PWM | safe | i2c | |
| 21 | 38 | D8PWM4CAMD7PWM | safe | - | |
| 22 | 39 | D7CAMPCPWM | strapping | - | |
| 23 | 40 | D6CAMD6PWM | strapping | - | |
| 24 | 41 | D5CAMD2PWM | strapping | - | |
| 25 | 42 | SSD4CAMD5PWM | strapping | spi | |
| 26 | 43 | TXD2PWM | strapping | uart | |
| 27 | 44 | RXD3PWM | strapping | uart | |
| 28 | 47 | SDAD10 | strapping | i2c | |
| 29 | 48 | LED_BUILTIND9 | strapping | - | |
| 30 | - | MOSI =MISO =SCK = | safe | - |
Start with these
13 pins with no boot or system involvementT7D0T8D1A0T0A1T1A2T2A3T3T4D14A4PWM0A5PWM1A6PWM2A7PWM3SCLD11D8PWM4
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 |
|---|---|---|---|
| GPKEY | GPIO0 | Must be pulled high (default) or low (to enter UART download mode) at reset. Using it for other functions can interfere with boot mode configuration. | Strapping |
| T5 | GPIO3 | Sampled at reset to select JTAG interface (USB Serial/JTAG controller vs. external pins). Improper use can disable external JTAG or alter debug interface. | Strapping |
| A8 | FSPIHD | 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 |
| T6 | FSPICS0 | 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 |
| D18 | 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 |
| D17 | 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 |
| D16 | 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 |
| D19 | FSPIWP | 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 |
| D7 | MTCK (GPIO39) | Default JTAG TCK - keep it free if you debug over JTAG. It is not a flash or PSRAM line on standard modules: those sit on GPIO26-37. | Other |
| D6 | MTDO (GPIO40) | Default JTAG TDO output for debugging. Using it as GPIO will interfere with JTAG debugging functionality. | Other |
| D5 | MTDI (GPIO41) | Default JTAG TDI input for debugging. Should be reserved for JTAG or left unused if JTAG is to remain available. | Other |
| SS | MTMS (GPIO42) | Default JTAG TMS signal for debugging. Using this pin for other purposes will disable the JTAG interface (unless JTAG is rerouted to USB). | Other |
| 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 |
| SDA | SPICLK_P | Only the 1.8 V octal parts (ESP32-S3R8V, ESP32-S3R16V) run the differential memory clock here, and on those the pin works at 1.8 V instead of 3.3 V. On the common 3.3 V modules it is a normal GPIO - several devkits drive their RGB LED from GPIO48. | Other |
| LED_BUILTIN | SPICLK_N | Only the 1.8 V octal parts (ESP32-S3R8V, ESP32-S3R16V) run the differential memory clock here, and on those the pin works at 1.8 V instead of 3.3 V. On the common 3.3 V modules it is a normal GPIO - several devkits drive their RGB LED from GPIO48. | Other |
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 Deneyap Kart 1A v2 pinout brings out 30 pins at a 2.54 mm pitch - 29 usable GPIO. For peripherals, I²C is mapped to SDA on GPIO47 and SCL on GPIO21, while…
The Deneyap Kart 1A v2 pinout brings out 30 pins at a 2.54 mm pitch - 29 usable GPIO.
For peripherals, I²C is mapped to SDA on GPIO47 and SCL on GPIO21, while TX/RX on GPIO43 and GPIO44 cover serial logging and flashing.
On the analog side there are 9 ADC-capable pins for sensors and battery monitoring and 9 capacitive-touch inputs.
If you want zero surprises, T7, T8, A0, A1 and 9 more are free of any such role - the safest first picks. 16 of the exposed pins carry boot-time or system duties on the ESP32-S3 (GPKEY, T5, A8 and 13 more).
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
GPIO1 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"▸
USB CDC On Boot: "Enabled"▸
Flash Size: "4MB (32Mb)"▸
Flash Mode: "DIO"▸
PSRAM: "OPI PSRAM"▸
Partition Scheme: "Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS)" (default)▸
Upload Speed: "921600"▸
▸ every other Tools option - leave at default
Board: ESP32S3 Dev Module USB CDC On Boot: Enabled Flash Size: 4MB (32Mb) Flash Mode: DIO PSRAM: OPI PSRAM Partition Scheme: Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS) Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP32 Arduino ▸ ESP32S3 Dev Module
// toggle GPIO1 - wire an LED and resistor to it
void setup() {
pinMode(1, OUTPUT);
}
void loop() {
digitalWrite(1, HIGH); delay(500);
digitalWrite(1, LOW); delay(500);
}board to selectesp32-s3-devkitc-1⧉ copy
[env:deneyapkart1Av2]
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 - GPIO1
output:
- platform: gpio
pin: 1
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 1310720 B · data 327680 B · DIO
Specifications
ESP32-S3 · 63.5 × 25.4 mm · vs other ESP32 chips →Compute
MCU
ESP32-S3
Clock
240 MHz
SRAM · Flash
512 KB · 4MB · 8MB (OPI) PSRAM
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
5.0 LE
Antenna
PCB
I/O
GPIO · ADC
29 · 9
UART · I²C · SPI
3 · 2 · 2
PWM
8 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x0
Electrical
Input
5V USB-C · 3.7V LiPo
Consumption
-
Regulator
-
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
DIO · QIO
Sketch · Data
1.25 MB · 320 KB
63.5 × 25.4 mm · pin pitch 2.54 mm
The Deneyap Kart 1A v2 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 its core is the ESP32-S3 - a dual-core Xtensa with vector extensions suited to AI workloads.
29 GPIO are broken out - more than most ESP32-S3 boards, so the pin budget is rarely the constraint.
Onboard you'll find 8MB (OPI) PSRAM, a microSD slot, a Qwiic connector, an addressable RGB LED (GPIO48), battery charging via true and Reset/Boot buttons.
It flashes over native USB - no serial-converter driver needed, which isn't a given among ESP32-S3 boards.
- DVP camera FPC connector on the back
- Bluetooth 5 LE with long-range Coded PHY
Resources
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