> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meowkit.cc/llms.txt
> Use this file to discover all available pages before exploring further.

# Tech specs

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/Front-View_1600-%C3%97-900-px.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=5f390aead7f0311ebdd3c26643e9aa8f" alt="Front View 1600 × 900 Px" width="1600" height="900" data-path="images/Front-View_1600-×-900-px.png" />

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/Rear-View_1600-x-900-px.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=00f0863ba3c10ff56292370b134ff814" alt="Rear View 1600 X 900 Px" width="1600" height="900" data-path="images/Rear-View_1600-x-900-px.png" />

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/Side-View_1600-x-900-px.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=fddf5f3c291498dc6e735679d25a15dd" alt="Side View 1600 X 900 Px" width="1600" height="900" data-path="images/Side-View_1600-x-900-px.png" />

Explore the hardware architecture of MeowKit and discover how each component is thoughtfully integrated to create a versatile platform for developers, makers, and hardware enthusiasts.

***

# Certification & Compliance

|  **Category**  |       **Compliance**       |
| :------------: | :------------------------: |
|  EMC & Safety  |       CE / FCC / UKCA      |
|  Environmental |         RoHS / WEEE        |
| Battery Safety |  UN38.3 / IEC 62133 / MSDS |
|  Air Transport | UN38.3 Test Summary / IATA |
|  Sea Transport | IMDG Transport Declaration |

***

# Body

<Columns cols={2}>
  <Column>
    <img src="https://mintcdn.com/whiteclifftechnologylimited/cnGi627NoT_iLVVJ/images/Font-MeowKit-S3-Standard-Edition.png?fit=max&auto=format&n=cnGi627NoT_iLVVJ&q=85&s=b622e736f0da025c37ee3197da95d7e5" alt="Font Meow Kit S3 Standard Edition" width="1280" height="1280" data-path="images/Font-MeowKit-S3-Standard-Edition.png" />
  </Column>

  <Column>
    <img src="https://mintcdn.com/whiteclifftechnologylimited/cnGi627NoT_iLVVJ/images/Back-MeowKit-S3-Standard-Edition.png?fit=max&auto=format&n=cnGi627NoT_iLVVJ&q=85&s=2d1cbf828c9340757a16a6cc52fc48aa" alt="Back Meow Kit S3 Standard Edition" width="1280" height="1280" data-path="images/Back-MeowKit-S3-Standard-Edition.png" />
  </Column>
</Columns>

**Materials:** PC, ABS，6061 Aluminum Alloy

***

# Size and weight

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/Size_1600-x-900-px.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=60c0e0fb345a201d6fb2df1342b7e4f3" alt="Size 1600 X 900 Px" width="1600" height="900" data-path="images/Size_1600-x-900-px.png" />

Height: 62 mm<br />Width: 68.5 mm

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/Deoth_1600-x-900-px.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=7997288792a82a57f474fb3b787b2765" alt="Deoth 1600 X 900 Px" width="1600" height="900" data-path="images/Deoth_1600-x-900-px.png" />

Deoth: 19 mm<br />Weight: 75 g

***

# MCU

* Model: ESP32-S3-WROOM-1-N16R8
* CPU: Xtensa® 32-bit LX7 Dual-core, up to 240 MHz
* Wireless: 2.4 GHz Wi-Fi (802.11 b/g/n), Bluetooth 5.0 LE (Mesh supported)
* Memory: 512 KB internal SRAM, supports 8 MB external PSRAM
* Flash: 16 MB

***

# Display

<img src="https://mintcdn.com/whiteclifftechnologylimited/y4J_b5OiZtWv8NyT/images/Display-1.png?fit=max&auto=format&n=y4J_b5OiZtWv8NyT&q=85&s=ac3e5b66371e29ae63d295ef3b2bf9cb" alt="Display 1" width="1600" height="900" data-path="images/Display-1.png" />

* Type: LCD Color (IPS, full viewing angle)
* Resolution: 320 × 240 px
* Controller: ST7789
* Interface: SPI
* Size: 2.0"
* Touch: FT6336 (Capacitive, I²C)

***

# Buttons & Joystick

* A/B: Membrane tactile switches
* Joystick: 4-way directional (Up/Down/Left/Right/Press)

***

# USB

**Native USB OTG Controller**

* Firmware Download & Upgrade
* JTAG Debugging via OpenOCD
* USB CDC Virtual COM Port
* USB HID Device Support
* USB Mass Storage (MSC)

***

# LED

* WS2812B-2020

***

# Storage

* Interface: 3-wire SDMMC (1-bit mode)
* Card: Lexar 633x, 32 GB

***

# Audio

**Input**

* ADC: ES7210
* Microphone: ZTS6216 (Digital MEMS mic)

**Output**

* DAC: ES8311
* Amplifier: NS4150B, Class-D, 1 W
* Speaker: 1W 8Ω speaker with 1.25mm connector
* Headphone: 3.5 mm jack

***

# Power

* Battery: 1200mAh Li-ion battery (503759, protected, 1.25mm 2-pin connector)
* PMU: AXP173
* Charging: USB-C, 5V input

***

# IO Expander

* Model: PCA9557PW
* Type: 8‑bit I/O Expander (I²C/SMBus)

***

# Real Time Clock

* Model: PCF8563ATL/1,118
* Interface: I²C \~0.27 µA typical (≤0.6 µA max)

***

# IMU

* Model: BMI270 + BMM150
* Type: 6-axis IMU (3-axis accelerometer + 3-axis gyroscope) + 3-axis magnetometer

***

# Infrared

* RX wavelength: 950 nm (±100 nm)
* RX carrier: 38 KHz (+/-5%)
* TX wavelength: 930\~970 nm
* TX carrier: 0-2 MHz
* TX power: 280 mW

***

# GPIO

1×16-pin (2.54 mm) Dupont female expansion header

<img src="https://mintcdn.com/whiteclifftechnologylimited/o71nU9kg9_tX89sw/images/GPIO.png?fit=max&auto=format&n=o71nU9kg9_tX89sw&q=85&s=745c2361f1455f0a676dd75df9473234" alt="GPIO" width="5334" height="5334" data-path="images/GPIO.png" />

**External Power:**

  Pin 1: 3.3 V

  Pin 2: GND

  Pin 3: 5 V / VBUS

**I²C:**

  Pin 4: SDA (1 kΩ optional pull-up)

  Pin 5: SCL (1 kΩ optional pull-up)

**SPI:**

  Pin 6: CS0 (EXP\_IO2)

  Pin 7: MOSI (GPIO11)

  Pin 8: MISO (GPIO10)

  Pin 9: SCLK (GPIO9)

**Multi-function:**

  Pin 10: GPIO44

  Pin 11: GPIO12 / U

  Pin 12: GPIO17 / L /PWM

  Pin 13: GPIO18 / D / ADC

  Pin 14: GPIO8 / R / INT

Pin 15: RESET (hardware reset)

Pin 16: GND

***

# NFC

**Internal NFC Expansion Module(Optional)**

* Controller: ST25R3916
* Frequency: 13.56 MHz
* Protocols: ISO/IEC 14443A/B, ISO/IEC 15693, NFC Forum, FeliCa™
* Modes: Reader / Writer, Card Emulation
* Interface: I²C