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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 | strapping | - | |
| 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
12 pins with no boot or system involvementT7D0T8D1A0T0A1T1A2T2A3T3T4D14A4PWM0A5PWM1A6PWM2A7PWM3SCLD11
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 |
| D7 | MTCK (GPIO39) | Default JTAG debugging TCK pin. If JTAG is needed, this pin must be free; it may also be used internally for PSRAM chip select on certain modules, so avoid repurposing it. | 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 |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| A8 | FSPIHD | Connected to external flash (data/hold signal) on most modules. Not recommended for use as GPIO, since it must remain dedicated to flash communication. | Flash |
| T6 | FSPICS0 | Used to select the external flash chip. It is required for flash access and cannot be repurposed without losing flash connectivity | Flash |
| D18 | FSPID | Used as a data line for flash (and in-package PSRAM). It should not be used as GPIO when the flash/PSRAM is in use. | Flash |
| D17 | FSPICLK | Drives the flash (and PSRAM) clock. This critical signal must be reserved for memory and not used as general GPIO. | Flash |
| D16 | FSPIQ | Used as a data line for flash/PSRAM transfers. Not available for other uses when flash/PSRAM is connected. | Flash |
| D19 | FSPIWP | Connected to external flash (data/write-protect signal). Not recommended as GPIO because it’s reserved for flash operations. | Flash |
| D8 | FSPIWP | On flash-equipped chips, this pin is tied to the flash’s WP# (or D3) line. It should be avoided for other use, as it’s needed for flash operations. | Flash |
| SDA | SPICLK_P | Used only on variants with Octal SPI interface (e.g. ESP32-S3R16V) as part of the differential clock pair. On such chips it operates at 1.8 V and is reserved for the high-speed octal SPI clock, not for general GPIO use. | Flash |
| LED_BUILTIN | SPICLK_N | Used only on variants with Octal SPI interface, as the negative leg of the differential clock&. On such chips it operates at 1.8 V; it should be avoided for GPIO to prevent conflicts with the octal flash/PSRAM clock. | Flash |
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 8 more are free of any such role - the safest first picks. 8 of the exposed pins carry boot-time or system duties on the ESP32-S3 (GPKEY, T5, D7 and 5 more).
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Native USB - no driver, no serial chip. Not detected? Hold BOOT while plugging in.
2
Flash with your tool
Arduino IDE, PlatformIO, ESPHome or esptool - copy the settings on the right.
3
Verify it runs
The blink example uses GPIO1 - swap for your board's LED pin if different.
Board: Dydk1av2
USB CDC On Boot: Enabled
Flash Size: 4MB · DIO
Upload Speed: 921600
// blink
pinMode(1, OUTPUT);
digitalWrite(1, LOW); // on (often inverted)[env:deneyapkart1Av2]
platform = espressif32
board = esp32-s3-devkitc-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32-s3-devkitc-1
variant: deneyapkart1Av2
framework:
type: esp-idf
# blink - GPIO1
output:
- platform: gpio
pin: 1
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32s3 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binBuild details: sketch space 1310720 B · data 327680 B · DIO
Specifications
ESP32-S3 · 63.5 × 25.4 mmCompute
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 · 4
PWM
8 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x0
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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