LOLIN S2 PICO

Development Board

Code name: LOLIN_S2_PICO

ESP32S2 WEMOS

LOLIN S2 PICO is a development board based on the ESP32S2 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.

About LOLIN S2 PICO

Tiny ESP32-S2 board with castellated edges and USB-C - ideal for compact integrations and custom modules.

Technical Specifications

Complete technical specification details for LOLIN S2 PICO

Display

Type OLED

Resolution 128x32

Driver SSD1306

Connectivity

WiFi 802.11 b/g/n 2.4 GHz

Bluetooth -

BLE -

Microcontroller

Model esp32s2

Clock Speed 240 MHz

Flash Size 4MB

PSRAM 2MB

Architecture xtensa

✨ Features & Pins

Digital IO 21

Analog Input 20

PWM 26

Interrupts 46

Download Full Datasheet

Quick Setup

Copy-paste configs for LOLIN S2 PICO - auto‑generated from this board's exact hardware specs.

ESP32S2 240 MHz 4MB DIO Xtensa

In Arduino IDE 2 select Lolin S2 Pico from the esp32 by Espressif package. In PlatformIO use board = esp32-s2-saola-1. ESP32S2 · 240 MHz · 4MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Lolin S2 Pico

CPU Frequency 240 MHz

Flash Size 4MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Lolin S2 Pico" for the LOLIN S2 PICO.

platformio.ini


[env:lolin_s2_pico]
platform  = espressif32
board     = esp32-s2-saola-1
framework = arduino

; Exact hardware config for LOLIN S2 PICO
board_build.mcu        = esp32s2
board_build.f_cpu      = 240000000L
board_build.flash_size = 4MB
board_build.flash_mode = dio
board_upload.flash_size = 4MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-s2-saola-1
  framework:
    type: arduino   # or "esp-idf"

# LOLIN S2 PICO - 240 MHz ESP32S2
# Flash: 4MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32s2 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 4MB \
    0x1000 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x1000

Useful Links

Datasheets and resources for LOLIN S2 PICO

Board Datasheet

Technical specifications

ESP32S2 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for LOLIN S2 PICO

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
1	A0	T1	PWM
2	A1	T2	PWM
3	A2	T3	PWM
4	A3	T4	PWM
5	A4	T5	PWM
6	A5	T6	PWM
7	A6	T7	PWM
8	A7	T8	PWM	SDA
9	A8	T9	PWM	SCL
10	A9	T10	PWM	LED_BUILTIN
11	A10	T11	PWM
12	A11	T12	PWM
13	A12	T13	PWM
14	A13	T14	PWM
15	A14		PWM
16	A15		PWM
17	A16		PWM	DAC1
18	A17		PWM	DAC2 S2_PICO_OLED_RESET
19	A18		PWM
20	A19		PWM
33			PWM	RX
34			PWM	SS
35			PWM	MOSI
36			PWM	SCK
37			PWM	MISO
38			PWM	TX
0x00000000				USB_FW_MSC_SERIAL_NUMBER

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for LOLIN S2 PICO

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x1000`
Flash mode	dio
Boot mode	qio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)