Bee S3

Development Board

Code name: Bee_S3

ESP32S3

Bee S3 is a development board based on the ESP32S3 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 8MB flash memory.

About Bee S3

A compact ESP32-S3 development board designed for general-purpose IoT applications.

Technical Specifications

Complete technical specification details for Bee S3

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32s3

Clock Speed 240 MHz

Flash Size 8MB

Architecture xtensa

✨ Features & Pins

Digital IO 15

Analog Input 8

PWM 17

Interrupts 45

Quick Setup

Copy-paste configs for Bee S3 - auto‑generated from this board's exact hardware specs.

ESP32S3 240 MHz 8MB DIO Xtensa

In Arduino IDE 2 select Bee S3 from the esp32 by Espressif package. In PlatformIO use board = esp32-s3-devkitm-1. ESP32S3 · 240 MHz · 8MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Bee S3

CPU Frequency 240 MHz

Flash Size 8MB

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 "Bee S3" for the Bee S3.

platformio.ini


[env:Bee_S3]
platform  = espressif32
board     = esp32-s3-devkitm-1
framework = arduino

; Exact hardware config for Bee S3
board_build.mcu        = esp32s3
board_build.f_cpu      = 240000000L
board_build.flash_size = 8MB
board_build.flash_mode = dio
board_upload.flash_size = 8MB

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

esp32: block (YAML)


esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino   # or "esp-idf"

# Bee S3 - 240 MHz ESP32S3
# Flash: 8MB | USB: N/A

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

esptool.py - flash command


esptool.py \
  --chip esp32s3 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 8MB \
    0x0 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x0

Useful Links

Datasheets and resources for Bee S3

ESP32S3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for Bee S3

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
1			PWM	VBAT_VOLTAGE
3	A3	T3	PWM
4	A4	T4	PWM
5	A5	T5	PWM	SS
6	A6	T6	PWM
7	A7	T7	PWM
8	A8	T8	PWM
9	A9	T9	PWM
10	A10	T10	PWM
34			PWM	RGB_PWR
35			PWM	MOSI SDO
36			PWM	SCL
37			PWM	SDA
38			PWM	MISO SDI
39			PWM	SCK
43			PWM	TX
44			PWM	RX
48				RGB_DATA

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 Bee S3

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	dio
Boot mode	qio
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)