Name: Multi-Sensor Expansion Board for NE101 and NE301
SKU: 50.006.000001
Availability: InStock

Product Overview

Designed for the NE101 and NE301 AI mainboards, this expansion board enables developers to build intelligent sensing and interaction devices that combine:

Ultra-low-power event triggering
Edge AI processing
Multi-sensor fusion
Audio and display interaction
Modular enclosure configurations

With system sleep current as low as 7–8 μA, supported sensors can wake the main AI processor directly through hardware interrupts. This makes the board suitable for rapid prototyping across multiple applications while allowing the same PCBA design to evolve into production-ready devices.

Key Features

Seamless NE101 / NE301 Integration

Pin-compatible with the NE101 ESP32-S3 and NE301 mainboards for direct hardware integration.

8+ Sensor Options

Supports onboard or external sensors including:

Audio and Display Support

Integrates an analog silicon microphone and an 8 Ω, 0.8 W speaker output. SPI interfaces can also drive monochrome OLED or TFT color displays.

Ultra-Low-Power Wake-Up

System sleep current can reach 7–8 μA. PIR, radar, ToF, and IMU sensors can wake the main processor directly through GPIO hardware interrupts for fast event-triggered operation.

Flexible Product Form Factors

A shared sensing platform, dynamically mapped physical components, and modular front-cover design allow one PCBA to support multiple product formats, including:

Smart greeting terminals
People-counting devices
Industrial monitoring nodes
Environmental sensing devices

Sensor Selection Guide

Sensor Type	Supported Model	Key Specifications	Interface	Application and Integration Notes
Temperature and Humidity	SHT30	Temperature: 0–90°C, ±0.2°C; Humidity: ±2% RH	I²C	Suitable for accurate environmental monitoring. The enclosure should include ventilation openings.
6-Axis IMU	LSM6DSR	Gyroscope: up to 4,000 dps; Accelerometer: up to ±16 g	I²C / SPI	Low-power operation at approximately 1.2 mA. Supports wake-up triggers for falls, tilt, vibration, and impact events.
Presence Radar	RKB1161L	24 GHz FMCW; motion detection up to 7 m; presence detection up to 4 m	UART / GPIO	Detection sensitivity is configurable by command. The front enclosure must use a non-metallic, RF-transparent material.
Thermopile Array	MLX90642	32 × 24 resolution; 110° field of view	I²C	Suitable for human presence and fire detection. Requires a compatible lens and software filtering.
Long-Range ToF	DTS6012M	905 nm; measuring range up to 18 m; FOV below 2°	I²C	Narrow-beam design with strong ambient-light resistance. Suitable for precise line-crossing detection.
Short-Range ToF	VL53L1CX	940 nm; measuring range up to 4 m; FOV below 27°	I²C	Suitable for accurate proximity triggering. Cover-window transmission should be calibrated to prevent false triggers.
Ambient Light	LTR-311ALS	Dual-channel visible-light and infrared sensing	I²C	Distinguishes natural and artificial light. Lux readings should be calibrated with the final enclosure.
PIR Motion Sensor	NP624M-F	ADC and GPIO output modes	GPIO	Ultra-low-power infrared motion detection. Requires a compatible Fresnel lens.
Microphone	LMA3729T381	Analog silicon microphone; sensitivity: −38 dB	Analog	Supports clear voice detection within approximately 1 meter. An acoustic chamber should be designed to reduce wind noise.
Speaker Output	8 Ω, 0.8 W Speaker	0.8 W at 5 V	Wafer Connector	Supports voice prompts and audible alerts. A vertical connector is provided.
Audio Codec	NAU88C10	Audio encoding and decoding	SAI	Supports digital audio input and output integration.

Hardware Integration Notes

Shared Communication Buses

Most low-speed sensors—including temperature and humidity, IMU, ToF, ambient light, and thermopile sensors—share the I²C bus.

The recommended interface allocation is:

I²C: Low-speed sensors
SPI: OLED or TFT display
UART: Radar and external communication modules
GPIO: Hardware interrupt and event-trigger signals

Optical Window Design

When a protective cover is used, the optical openings must be designed carefully.

For the 18 m long-range ToF sensor, use a direct optical channel or light-guiding cone to prevent internal reflections and false readings. PIR and thermopile sensors also require dedicated front-facing lens openings.

Radar and Antenna Considerations

When integrating the 24 GHz radar, do not use metallic paint or large metal components in front of the sensor. Metal materials may block the radar signal and significantly reduce detection performance.

Acoustic Enclosure Design

For outdoor applications, microphone and speaker openings should use waterproof, breathable acoustic membranes.

Separate sealed acoustic chambers are recommended to prevent:

Water accumulation
Internal resonance
Speaker-to-microphone interference
Excessive wind noise

Example Product Configurations

1. Smart Greeting and Check-In Terminal

Recommended configuration:
NE301 + Display + Short-Range or Long-Range ToF / PIR + Speaker

When a person approaches, the sensor wakes the main processor and camera. The system can then perform face or license plate recognition, display relevant information, and provide voice confirmation through the speaker.

2. Discreet Retail People Counting and Environmental Monitoring

Recommended configuration:
NE301 + 24 GHz Radar, Long-Range ToF, or PIR + Temperature and Humidity Sensor

The device can be ceiling-mounted or side-mounted near an entrance. A radar-transparent enclosure enables unobtrusive monitoring of entry and exit activity, people flow, and environmental conditions, with periodic data reporting to a backend platform.

3. Industrial Anomaly Monitoring and Event Capture

Recommended configuration:
NE301 + LSM6DSR 6-Axis IMU

The device can be mounted on electrical cabinets, machinery, towers, or other structures. It remains in an ultra-low-power state during normal operation and wakes rapidly when abnormal vibration, impact, tilt, or structural movement is detected.

The system can then capture visual evidence and store it locally or send it to a remote platform.

4. Wildlife Monitoring and Camera Trigger

Recommended configuration:
NE301 + PIR / Thermopile Array / ToF + Weather-Resistant Camouflage Enclosure

Multiple sensors can be combined to detect wildlife while filtering interference from moving vegetation and environmental changes.

Once a valid target is detected, the system outputs a low-latency trigger signal to wake or activate an external telephoto camera for image capture.

Accessories

Multi-Sensor Expansion Board for NE101 and NE301

Accessories

Product Overview