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.

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Certification & Compliance

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Body

Materials: PC, ABS，6061 Aluminum Alloy

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Size and weight

Height: 62 mm
Width: 68.5 mm Deoth: 19 mm
Weight: 75 g

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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

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Display

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

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Buttons & Joystick

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

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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)

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LED

• WS2812B-2020

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Storage

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

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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

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Power

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

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IO Expander

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

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Real Time Clock

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

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IMU

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

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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

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GPIO

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

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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