Yes
No
N/A
Adafruit FunHouse
ESP32-S2 board with sensors, screen, and buttons - ideal for smart home control panels and STEM projects.
85 × 56 mm
ESP32-S2
MCU
240MHz
clock
4MB
flash
320KB
SRAM
31· 4 ADC
GPIO
Wi-Fi
radio
Pinout
31 pins
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 0 | PIN_BUTTON4 | strapping | - | |
| 2 | 1 | A2PWM | safe | adc | |
| 3 | 2 | A1PWM | safe | adc | |
| 4 | 3 | PIN_BUTTON1PWM | safe | - | |
| 5 | 4 | PIN_BUTTON2PWM | safe | - | |
| 6 | 5 | PIN_BUTTON3PWM | safe | - | |
| 7 | 6 | T6PWM | safe | touch | |
| 8 | 7 | T7PWM | safe | touch | |
| 9 | 8 | T8PWM | safe | touch | |
| 10 | 9 | T9PWM | strapping | touch | |
| 11 | 10 | T10PWM | strapping | touch | |
| 12 | 11 | T11PWM | strapping | touch | |
| 13 | 12 | T12PWM | strapping | touch | |
| 14 | 13 | T13PWM | strapping | touch | |
| 15 | 14 | PIN_DOTSTAR_DATAPWM | strapping | - | |
| 16 | 15 | PIN_DOTSTAR_CLOCKPWM | strapping | - | |
| 17 | 16 | SENSOR_PIRPWM | strapping | - | |
| 18 | 17 | A0DAC1PWM | safe | adc · dac | |
| 19 | 18 | SENSOR_LIGHTA3DAC2PWM | safe | adc · dac | |
| 20 | 21 | TFT_BACKLIGHTPWM | safe | - | |
| 21 | 33 | SCLPWM | strapping | i2c | |
| 22 | 34 | SDAPWM | strapping | i2c | |
| 23 | 35 | MOSIPWM | strapping | spi | |
| 24 | 36 | SCKPWM | strapping | spi | |
| 25 | 37 | LED_BUILTINMISOPWM | strapping | spi | |
| 26 | 39 | TFT_DCPWM | strapping | - | |
| 27 | 40 | TFT_CSSSPWM | strapping | spi | |
| 28 | 41 | TFT_RESETPWM | strapping | - | |
| 29 | 42 | SPEAKERPWM | strapping | - | |
| 30 | 43 | TXPWM | uart | uart | |
| 31 | 44 | RXPWM | uart | uart |
Start with these
13 pins with no boot or system involvementA2PWMA1PWMPIN_BUTTON1PWMPIN_BUTTON2PWMPIN_BUTTON3PWMT6PWMT7PWMT8PWMA0DAC1SENSOR_LIGHTA3TFT_BACKLIGHTPWMTXPWMRXPWM
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 |
|---|---|---|---|
| PIN_BUTTON4 | GPIO0 | Must be pulled high for normal boot; pulling low at reset enters bootloader (download mode). Also serves as SPI flash data-in (SPID) line when using external flash memory. | Strapping |
| PIN_DOTSTAR_CLOCK | XTAL_32K_P | If an external 32 kHz crystal is used for RTC, this pin is dedicated to the crystal and cannot be used as GPIO. | Other |
| SENSOR_PIR | XTAL_32K_N | If using an external 32 kHz crystal, this pin is connected to the crystal and should not be used as general I/O. | Other |
| TFT_DC | MTCK | Used for JTAG debugging interface; using this pin for other purposes will disable JTAG clock input. | Other |
| TFT_CS | MTDO | Part of JTAG interface (TDO); should be avoided as GPIO if JTAG debugging is needed. | Other |
| TFT_RESET | MTDI | Part of JTAG interface (TDI); avoid using as GPIO to retain ability for JTAG debug. | Other |
| SPEAKER | MTMS | JTAG TMS pin; should not be repurposed if JTAG debugging or programming via JTAG is required. | Other |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| T9 | FSPIHD | Typically used as flash/PSRAM IO line in certain configurations; avoid using as GPIO if flash or PSRAM is present. | Flash |
| T10 | FSPICS0 | Often used as flash chip select in some designs; not available for GPIO when controlling flash. | Flash |
| T11 | FSPID | Used for flash data transfer in certain configurations; should be avoided for general use if flash is connected. | Flash |
| T12 | FSPICLK | Used as flash clock line in some boards; not free for GPIO if driving flash. | Flash |
| T13 | FSPIQ | Used for flash data output in certain configurations; avoid using as GPIO if connected to flash. | Flash |
| PIN_DOTSTAR_DATA | FSPIWP | Used as flash write-protect/data line on some modules; not recommended for other usage. | Flash |
| SCL | SPIHD | Connected to SPI flash (hold/data line); not available for general-purpose use. | Flash |
| SDA | SPIWP | Connected to SPI flash (write-protect/data line); not recommended for other use. | Flash |
| MOSI | FSPID | Used by internal flash/PSRAM on some ESP32-S2 variants; avoid using as GPIO to prevent conflicts. | Flash |
| SCK | FSPICLK | May be connected to internal flash or used for high-speed SPI; not intended for general GPIO use. | Flash |
| LED_BUILTIN | FSPIQ | Used for internal flash/PSRAM data in some models; should not be repurposed for GPIO. | 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 All 31 pins on the Adafruit FunHouse are usable GPIO. Peripheral wiring is straightforward: I²C is mapped to SDA on GPIO34 and SCL on GPIO33; the SPI bus (…
All 31 pins on the Adafruit FunHouse are usable GPIO.
Peripheral wiring is straightforward: I²C is mapped to SDA on GPIO34 and SCL on GPIO33; the SPI bus (MOSI, MISO, SCK, SS) is broken out in full; TX/RX on GPIO43 and GPIO44 cover serial logging and flashing.
Beyond plain digital I/O you get 4 ADC-capable pins for sensors and battery monitoring, 8 capacitive-touch inputs and 2 true DAC outputs.
7 of the exposed pins carry boot-time or system duties on the ESP32-S2 (PIN_BUTTON4, PIN_DOTSTAR_CLOCK, SENSOR_PIR and 4 more) - check the guidance above before wiring anything to them. A2, A1, PIN_BUTTON1, PIN_BUTTON2 and 9 more are free of any such role - the safest first picks.
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: Funhouse Esp32s2
USB CDC On Boot: Enabled
Flash Size: 4MB · DIO
Upload Speed: 921600
// blink
pinMode(1, OUTPUT);
digitalWrite(1, LOW); // on (often inverted)[env:adafruit_funhouse_esp32s2]
platform = espressif32
board = esp32-s2-saola-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32-s2-saola-1
variant: adafruit_funhouse_esp32s2
framework:
type: esp-idf
# blink - GPIO1
output:
- platform: gpio
pin: 1
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32s2 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binBuild details: sketch space 1310720 B · data 327680 B · DIO
Specifications
ESP32-S2 · 85 × 56 mmCompute
MCU
ESP32-S2
Clock
240 MHz
SRAM · Flash
320 KB · 4MB · 2MB (QSPI) PSRAM
Radio
Wi-Fi
802.11 b/g/n 2.4 GHz
Bluetooth
-
Antenna
PCB
I/O
GPIO · ADC
31 · 4
UART · I²C · SPI
2 · 1 · 4
PWM
8 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x1000
Display
Screen
TFT · 1.54" · 240x240
Driver
ST7789
Touch
No
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
DIO · QIO
Sketch · Data
1.25 MB · 320 KB
85 × 56 mm
The Adafruit FunHouse 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
Inside sits the ESP32-S2 - a single-core Xtensa with native USB-OTG and no Bluetooth.
At $34.95 it's on the expensive side for an ESP32-S2 board - most land around $20.
Around the module: 2MB (QSPI) PSRAM, a TFT 1.54" 240x240 display, a STEMMA QT connector, a speaker, an addressable RGB LED (GPIO14), an environmental sensor (AHT20), an ambient-light sensor and Up/Down/Select/Boot/Reset buttons.
It flashes over native USB - no serial-converter driver needed, which isn't a given among ESP32-S2 boards.
- DPS310 barometric pressure and temperature sensor (I2C 0x77)
- Five DotStar RGB LEDs (data GPIO14, clock GPIO15)
- PIR motion sensor socket on GPIO16 (Mini PIR not included)
- Three STEMMA 3-pin JST I/O ports for NeoPixels, servos, relays or speaker
- Capacitive touch - three pads plus a five-segment slider
Where to buy
prices are typical street pricesAdafruit FunHouse
$34.95per unit, typical
Resources
Similar boards
