ESP32-S2-SOLO-U official Espressif surface-mount wireless module with U.FL/IPEX connector for external antenna. 2.4 GHz Wi-Fi MCU module from the ESP32-S2 family. N4 variants include 4 MB SPI flash, with N4R2 variants adding PSRAM.
Pins 1–40
Pins 41–41
EN
GPIO15/U0RTS/ADC2_CH4/XTAL_32K_P
GPIO16/U0CTS/ADC2_CH5/XTAL_32K_N
MTCK/GPIO39/CLK_OUT3
MTDO/GPIO40/CLK_OUT2
MTDI/GPIO41/CLK_OUT1
MTMS/GPIO42
GPIO46
3V3
GND
GND
GND
U0RXD/GPIO44/CLK_OUT2
U0TXD/GPIO43/CLK_OUT1
GPIO20/U1CTS/ADC2_CH9/CLK_OUT1/USB_D+
GPIO19/U1RTS/ADC2_CH8/CLK_OUT2/USB_D-
GPIO0
GPIO1/TOUCH1/ADC1_CH0
GPIO2/TOUCH2/ADC1_CH1
GPIO3/TOUCH3/ADC1_CH2
GPIO4/TOUCH4/ADC1_CH3
GPIO5/TOUCH5/ADC1_CH4
GPIO6/TOUCH6/ADC1_CH5
GPIO7/TOUCH7/ADC1_CH6
GPIO8/TOUCH8/ADC1_CH7
GPIO9/TOUCH9/ADC1_CH8/FSPIHD
GPIO10/TOUCH10/ADC1_CH9/FSPICS0/FSPIIO4
GPIO11/TOUCH11/ADC2_CH0/FSPID/FSPIIO5
GPIO12/TOUCH12/ADC2_CH1/FSPICLK/FSPIIO6
GPIO13/TOUCH13/ADC2_CH2/FSPIQ/FSPIIO7
GPIO14/TOUCH14/ADC2_CH3/FSPIWP/FSPIDQS
GPIO17/U1TXD/ADC2_CH6/DAC_1
GPIO18/U1RXD/ADC2_CH7/DAC_2/CLK_OUT3
GPIO21
SPIIO4/GPIO33/FSPIHD
SPIIO5/GPIO34/FSPICS0
SPIIO6/GPIO35/FSPID
SPIIO7/GPIO36/FSPICLK
SPIDQS/GPIO37/FSPIQ
GPIO38/FSPIWP
GPIO45
| Pin | Position | Type | Function |
|---|---|---|---|
| EN | 3 | Control | EN |
| GPIO15U0RTSADC2_CH4XTAL_32K_P | 8 | GPIO, Signal | GPIO15/U0RTS/ADC2_CH4/XTAL_32K_P |
| GPIO16U0CTSADC2_CH5XTAL_32K_N | 9 | GPIO, Signal | GPIO16/U0CTS/ADC2_CH5/XTAL_32K_N |
| GPIO39MTCKCLK_OUT3 | 32 | GPIO, Signal | MTCK/GPIO39/CLK_OUT3 |
| GPIO40MTDOCLK_OUT2 | 33 | GPIO, Signal | MTDO/GPIO40/CLK_OUT2 |
| GPIO41MTDICLK_OUT1 | 34 | GPIO, Signal | MTDI/GPIO41/CLK_OUT1 |
| GPIO42MTMS | 35 | GPIO, Signal | MTMS/GPIO42 |
| GPIO46 | 16 | GPIO | GPIO46 |
| 3V3 | 2 | Power | 3V3 |
| GND | 1 | Ground | GND |
| GND | 40 | Ground | GND |
| GND | 41 | Ground | GND |
| GPIO44U0RXDCLK_OUT2 | 36 | GPIO, Signal | U0RXD/GPIO44/CLK_OUT2 |
| GPIO43U0TXDCLK_OUT1 | 37 | GPIO, Signal | U0TXD/GPIO43/CLK_OUT1 |
| GPIO20U1CTSADC2_CH9CLK_OUT1USB_D+ | 14 | GPIO, Signal | GPIO20/U1CTS/ADC2_CH9/CLK_OUT1/USB_D+ |
| GPIO19U1RTSADC2_CH8CLK_OUT2USB_D- | 13 | GPIO, Signal | GPIO19/U1RTS/ADC2_CH8/CLK_OUT2/USB_D- |
| GPIO0 | 27 | GPIO | GPIO0 |
| GPIO1TOUCH1ADC1_CH0 | 39 | GPIO, Signal | GPIO1/TOUCH1/ADC1_CH0 |
| GPIO2TOUCH2ADC1_CH1 | 38 | GPIO, Signal | GPIO2/TOUCH2/ADC1_CH1 |
| GPIO3TOUCH3ADC1_CH2 | 15 | GPIO, Signal | GPIO3/TOUCH3/ADC1_CH2 |
| GPIO4TOUCH4ADC1_CH3 | 4 | GPIO, Signal | GPIO4/TOUCH4/ADC1_CH3 |
| GPIO5TOUCH5ADC1_CH4 | 5 | GPIO, Signal | GPIO5/TOUCH5/ADC1_CH4 |
| GPIO6TOUCH6ADC1_CH5 | 6 | GPIO, Signal | GPIO6/TOUCH6/ADC1_CH5 |
| GPIO7TOUCH7ADC1_CH6 | 7 | GPIO, Signal | GPIO7/TOUCH7/ADC1_CH6 |
| GPIO8TOUCH8ADC1_CH7 | 12 | GPIO, Signal | GPIO8/TOUCH8/ADC1_CH7 |
| GPIO9TOUCH9ADC1_CH8FSPIHD | 17 | GPIO, Signal | GPIO9/TOUCH9/ADC1_CH8/FSPIHD |
| GPIO10TOUCH10ADC1_CH9FSPICS0FSPIIO4 | 18 | GPIO, Signal | GPIO10/TOUCH10/ADC1_CH9/FSPICS0/FSPIIO4 |
| GPIO11TOUCH11ADC2_CH0FSPIDFSPIIO5 | 19 | GPIO, Signal | GPIO11/TOUCH11/ADC2_CH0/FSPID/FSPIIO5 |
| GPIO12TOUCH12ADC2_CH1FSPICLKFSPIIO6 | 20 | GPIO, Signal | GPIO12/TOUCH12/ADC2_CH1/FSPICLK/FSPIIO6 |
| GPIO13TOUCH13ADC2_CH2FSPIQFSPIIO7 | 21 | GPIO, Signal | GPIO13/TOUCH13/ADC2_CH2/FSPIQ/FSPIIO7 |
| GPIO14TOUCH14ADC2_CH3FSPIWPFSPIDQS | 22 | GPIO, Signal | GPIO14/TOUCH14/ADC2_CH3/FSPIWP/FSPIDQS |
| GPIO17U1TXDADC2_CH6DAC_1 | 10 | GPIO, Signal | GPIO17/U1TXD/ADC2_CH6/DAC_1 |
| GPIO18U1RXDADC2_CH7DAC_2CLK_OUT3 | 11 | GPIO, Signal | GPIO18/U1RXD/ADC2_CH7/DAC_2/CLK_OUT3 |
| GPIO21 | 23 | GPIO | GPIO21 |
| GPIO33SPIIO4FSPIHD | 24 | GPIO, Signal | SPIIO4/GPIO33/FSPIHD |
| GPIO34SPIIO5FSPICS0 | 25 | GPIO, Signal | SPIIO5/GPIO34/FSPICS0 |
| GPIO35SPIIO6FSPID | 28 | GPIO, Signal | SPIIO6/GPIO35/FSPID |
| GPIO36SPIIO7FSPICLK | 29 | GPIO, Signal | SPIIO7/GPIO36/FSPICLK |
| GPIO37SPIDQSFSPIQ | 30 | GPIO, Signal | SPIDQS/GPIO37/FSPIQ |
| GPIO38FSPIWP | 31 | GPIO, Signal | GPIO38/FSPIWP |
| GPIO45 | 26 | GPIO | GPIO45 |
Logical bank 1
Logical bank 2
EN
GPIO15/U0RTS/ADC2_CH4/XTAL_32K_P
GPIO16/U0CTS/ADC2_CH5/XTAL_32K_N
MTCK/GPIO39/CLK_OUT3
MTDO/GPIO40/CLK_OUT2
MTDI/GPIO41/CLK_OUT1
MTMS/GPIO42
GPIO46
3V3
GND
GND
GND
U0RXD/GPIO44/CLK_OUT2
U0TXD/GPIO43/CLK_OUT1
GPIO20/U1CTS/ADC2_CH9/CLK_OUT1/USB_D+
GPIO19/U1RTS/ADC2_CH8/CLK_OUT2/USB_D-
GPIO0
GPIO1/TOUCH1/ADC1_CH0
GPIO2/TOUCH2/ADC1_CH1
GPIO3/TOUCH3/ADC1_CH2
GPIO4/TOUCH4/ADC1_CH3
GPIO5/TOUCH5/ADC1_CH4
GPIO6/TOUCH6/ADC1_CH5
GPIO7/TOUCH7/ADC1_CH6
GPIO8/TOUCH8/ADC1_CH7
GPIO9/TOUCH9/ADC1_CH8/FSPIHD
GPIO10/TOUCH10/ADC1_CH9/FSPICS0/FSPIIO4
GPIO11/TOUCH11/ADC2_CH0/FSPID/FSPIIO5
GPIO12/TOUCH12/ADC2_CH1/FSPICLK/FSPIIO6
GPIO13/TOUCH13/ADC2_CH2/FSPIQ/FSPIIO7
GPIO14/TOUCH14/ADC2_CH3/FSPIWP/FSPIDQS
GPIO17/U1TXD/ADC2_CH6/DAC_1
GPIO18/U1RXD/ADC2_CH7/DAC_2/CLK_OUT3
GPIO21
SPIIO4/GPIO33/FSPIHD
SPIIO5/GPIO34/FSPICS0
SPIIO6/GPIO35/FSPID
SPIIO7/GPIO36/FSPICLK
SPIDQS/GPIO37/FSPIQ
GPIO38/FSPIWP
GPIO45
Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.
10 I/Os Relay Module - CPU ESP32 (Relay Output) visual preview10 I/Os Relay Module - CPU ESP32 (Relay Output)
Adafruit ESP32 Feather V2 w.FL Antenna - 8MB Flash + 2MB PSRAM visual previewAdafruit ESP32 Feather V2 w.FL Antenna - 8MB Flash + 2MB PSRAM
Adafruit ESP32-C6 Feather - STEMMA QT visual previewAdafruit ESP32-C6 Feather - STEMMA QT
Adafruit ESP32-S2 Feather - 4MB Flash + 2MB PSRAM visual previewAdafruit ESP32-S2 Feather - 4MB Flash + 2MB PSRAM
Adafruit ESP32-S2 Feather with BME280 Sensor - STEMMA QT visual previewAdafruit ESP32-S2 Feather with BME280 Sensor - STEMMA QT
Adafruit ESP32-S3 Feather 8MB with w.FL Antenna visual previewAdafruit ESP32-S3 Feather 8MB with w.FL Antenna
Adafruit Feather HUZZAH with ESP8266 WiFi visual previewAdafruit Feather HUZZAH with ESP8266 WiFi
Adafruit HUZZAH ESP8266 Breakout visual previewAdafruit HUZZAH ESP8266 Breakout
Adafruit HUZZAH32 – ESP32 Breakout Board visual previewAdafruit HUZZAH32 – ESP32 Breakout Board
Adafruit HUZZAH32 ESP32 Feather Board visual previewAdafruit HUZZAH32 ESP32 Feather Board
Adafruit Metro ESP32-S3 with 16MB Flash 8MB PSRAM visual previewAdafruit Metro ESP32-S3 with 16MB Flash 8MB PSRAM
Adafruit Metro M4 Express AirLift (WiFi) - Lite visual previewAdafruit Metro M4 Express AirLift (WiFi) - Lite
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual previewAbout 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.
Boards · Arduino boards · 77 parts
15x7 CharliePlex LED Matrix FeatherWing - Cool White visual previewAbout 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.
Boards · HATs, Shields & add-ons · 270 parts
16-Ch Servo Driver Breakout for micro:bit, I2C visual previewSpecialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.
Boards · Other MCU boards · 229 parts
Adafruit DVI Breakout Board for HDMI Source Devices visual previewThe Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.
Boards · Pico & RP2040 boards · 43 parts