DESCRIPTION
Elevate your ESP32-S3 projects with this high-performance expansion board, engineered to bridge the gap between rapid prototyping and industrial-grade application. This board integrates a sophisticated array of sensors, audio processing capabilities, and high-current power management, making it an ideal hub for Edge AI, voice recognition, and autonomous robotics.
Core Sensor Suite & Navigation
Equipped with industry-standard I2C sensors, this board provides precise environmental and motion tracking out of the box:
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6-DoF IMU (BMI270): Ultra-low-power inertial measurement unit for gesture recognition, step counting, and orientation.
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AHT20 Sensor: High-accuracy temperature and humidity monitoring for climate-sensitive IoT nodes.
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5x Addressable NeoPixels: Integrated RGB LEDs for status signaling, animations, or ambient lighting effects.
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Passive Buzzer: Logic-controlled piezo for audible alerts and frequency-based feedback.
Professional Audio & Multimedia Integration
Designed for Voice Assistant and Media Player development, the board features dedicated audio pathways:
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INMP441 Microphone Header: High-performance, omnidirectional MEMS microphone support via I2S for crystal-clear voice sampling.
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MAX98357 I2S Amplifier: A Class D digital-to-analog converter (DAC) and amplifier that drives speakers directly with high efficiency.
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Display Ready: Includes dedicated breakout headers for OLED (I2C) and ST7789 TFT (SPI) screens, enabling rich graphical user interfaces.
Robotics & Actuation Support
Transform your ESP32-S3 into a robotics controller without the need for messy breadboards:
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3x Servo Headers: Direct PWM-capable pins for controlling SG90, SG92R, MG996R, or other standard servos.
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Ultrasonic Header: Plug-and-play support for HC-SR04 distance sensors, perfect for obstacle avoidance.
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Dual Tactile Buttons: User-programmable inputs for mode switching, resets, or manual triggers.
Industrial Power Management
The board is built to handle power-hungry peripherals like servos and high-brightness LED matrices:
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Wide Input Voltage: Supports 6V to 24V DC via a standard 2.1mm DC jack, ideal for LiPo batteries or wall adapters.
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High-Current 5V Rail: Integrated buck converter providing up to 3A output, ensuring stable power for the ESP32-S3, servos, and external modules simultaneously.
PIN MAPPINGS
- Passive Buzzer: 17
- Neopixel: 48
- BMI270 / AHT20 / OLED: 1 (SDA), 2 (SCL)
- BMI270 Interrupts: 18 (INT1), 8 (INT2)
- Push Buttons: 35 (SW1), 36 (SW2)
- Ultrasonic: 14 (TRIG), 13 (ECHO)
- Servo: 39 (S1), 38 (S2), 37 (S3)
- Microphone INMP441: 4 (WS), 5 (SCK), 6 (SD)
- Audio Amplifier MAX98357A: 7 (DIN), 15 (BCLK), 16 (LRCLK)
- TFT ST7789: 21 (SCL), 47 (SDA), 45 (RES), 40 (DC), 41 (CS), 42 (BLK)
APPLICATIONS
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Edge AI Voice Assistants: Using the I2S microphone and MAX98357 amp.
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Smart Home Hubs: Integrating AHT20 environmental data and OLED status displays.
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DIY Robotics: Utilizing the 3A power rail and 3-channel servo headers.
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Industrial Monitoring: Leveraging the wide 24V input range for factory floor deployment.
TECHNICAL DETAILS
- Input Voltage: 6V - 24V DC
- Power Output: 5V, up to 3A
- Motion Sensing: BMI270 (6-Axis Accel/Gyro)
- Climate Sensing: AHT20 (Temp/Humidity)
- Audio Input: INMP441 Header
- Audio Output: MAX98357 Class D Amp
- Visual Output: 5x WS2812B NeoPixels
- Display Support: I2C OLED / SPI ST7789
SHIPPING LIST
- 1x ESP32-S3 Expansion Board
