Yes
No
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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 |
| T9 | FSPIHD | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| T10 | FSPICS0 | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| T11 | FSPID | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| T12 | FSPICLK | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| T13 | FSPIQ | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| PIN_DOTSTAR_DATA | FSPIWP | IO MUX pin of the general-purpose SPI2 (FSPI) bus, not of the in-package flash - that sits on GPIO26-32. The datasheet does not restrict it, so it is only taken if your board wires flash, an SD card or a display to FSPI. | Other |
| 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 |
|---|---|---|---|
| SCL | SPIIO4 (GPIO33) | The datasheet keeps GPIO33-37 for "the higher 4 bits data line interface and DQS interface for the SPI0/1 interface in 8-line SPI mode, and can be GPIO pins if the chip is not connected to flash or PSRAM in 8-line SPI mode". Quad-SPI parts leave it free. | Flash |
| SDA | SPIIO5 (GPIO34) | The datasheet keeps GPIO33-37 for "the higher 4 bits data line interface and DQS interface for the SPI0/1 interface in 8-line SPI mode, and can be GPIO pins if the chip is not connected to flash or PSRAM in 8-line SPI mode". Quad-SPI parts leave it free. | Flash |
| MOSI | SPIIO6 (GPIO35) | The datasheet keeps GPIO33-37 for "the higher 4 bits data line interface and DQS interface for the SPI0/1 interface in 8-line SPI mode, and can be GPIO pins if the chip is not connected to flash or PSRAM in 8-line SPI mode". Quad-SPI parts leave it free. | Flash |
| SCK | SPIIO7 (GPIO36) | The datasheet keeps GPIO33-37 for "the higher 4 bits data line interface and DQS interface for the SPI0/1 interface in 8-line SPI mode, and can be GPIO pins if the chip is not connected to flash or PSRAM in 8-line SPI mode". Quad-SPI parts leave it free. | Flash |
| LED_BUILTIN | SPIDQS (GPIO37) | The datasheet keeps GPIO33-37 for "the higher 4 bits data line interface and DQS interface for the SPI0/1 interface in 8-line SPI mode, and can be GPIO pins if the chip is not connected to flash or PSRAM in 8-line SPI mode". Quad-SPI parts leave it free. | 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.
13 of the exposed pins carry boot-time or system duties on the ESP32-S2 (PIN_BUTTON4, T9, T10 and 10 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 - 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: "ESP32S2 Dev Module"▸
USB CDC On Boot: "Enabled"▸
Flash Size: "4MB (32Mb)"▸
Flash Mode: "DIO"▸
PSRAM: "QSPI 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: ESP32S2 Dev Module USB CDC On Boot: Enabled Flash Size: 4MB (32Mb) Flash Mode: DIO PSRAM: QSPI PSRAM Partition Scheme: Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS) Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP32 Arduino ▸ ESP32S2 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-s2-saola-1⧉ copy
[env:adafruit_funhouse_esp32s2]
platform = espressif32
board = esp32-s2-saola-1
framework = arduino
monitor_speed = 115200
upload_speed = 921600
board_build.arduino.memory_type = qio_qspi
build_flags = -DBOARD_HAS_PSRAMFind it: PlatformIO Home ▸ Boards, search
esp32-s2-saola-1 - or type it after board =.board to selectesp32-s2-saola-1⧉ copy
esp32:
board: esp32-s2-saola-1
variant: esp32s2
framework:
type: esp-idf
psram:
mode: quad
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-s2-saola-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 esp32s2 --port /dev/ttyACM0 \
--baud 921600 write_flash 0x1000 firmware.bin--port = your /dev/tty* (macOS/Linux) or COMx (Windows).Build details: sketch space 1310720 B · data 327680 B · DIO
Specifications
ESP32-S2 · 85 × 56 mm · vs other ESP32 chips →Compute
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 · 2 · 2
PWM
8 channels
Power
USB
USB-C
Serial
Native (CDC)
Boot address
0x1000
Electrical
Input
5V USB-C
Consumption
-
Regulator
-
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
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