Description

Grove – Offline Voice Recognition Module is a compact board built for local voice interaction without cloud dependency. Based on the VC-02 platform, it supports up to 150 pre-programmed voice commands, recognizes commands in less than 100ms, and communicates through UART, making it a practical edge voice control module for smart devices and embedded systems.

Because this board works without an internet connection, it is a better fit for privacy-focused devices, battery-powered products, and environments where connectivity is limited or undesirable. If you want a Grove voice recognition module for local command execution, this board provides a cleaner path than always-on cloud speech pipelines.

The hardware also supports analog and digital microphones, dual-channel DAC output, and multiple interfaces including UART, I2C, PWM, SPI, and GPIO. That gives this board broader integration options for smart home products, industrial terminals, toys, appliances, and other devices that need edge voice control.

Features

• Offline speech recognition with no internet dependency for local control.
• Supports up to 150 pre-programmed voice commands.
• Recognition time is less than 100ms for responsive edge voice control.
• Grove voice recognition module communicates through UART and returns unique hex codes for recognized commands.
• Supports 1 analog microphone input, 4 digital microphone inputs, and dual-channel DAC output.
• Additional interfaces include I2C, PWM, SPI, and GPIO.
• Low-power design is suitable for battery-operated edge devices.

Specifications

Applications

• Offline voice recognition module for smart home appliances and local voice interfaces.
• Edge voice control module for battery-powered and low-power devices.
• Grove voice recognition module projects with XIAO, Arduino, and other embedded controllers.
• Use in toys, consumer electronics, industrial terminals, and medical devices.
• Voice-triggered actions in wearables, IoT nodes, and local control systems.

Product List

• Grove – Offline Voice Recognition Module 1
• Speaker 1
• Grove Cable 1

Other Content

Why local voice control matters: A cloud service is not always desirable for simple command recognition. This module keeps voice interaction local, which makes it more practical for low-latency control, better privacy, and products that must keep working without network access.

Integration direction: Because the module outputs command IDs over UART, it is easier to integrate into automation logic than a more abstract speech pipeline. That is why it works well as an edge voice control module in embedded products.

Resources

• Grove Offline Voice Recognition Wiki
• Getting Started with Arduino and XIAO
• ESPHome and Home Assistant Reference
• Grove Sensor Ecosystem Guide

FAQ

Q: Does this module require internet access?
A: No. This is an offline voice recognition module, so command recognition is performed locally without cloud services.

Q: How many commands does the module support?
A: The module supports up to 150 pre-programmed voice commands.

Q: What interface is most commonly used?
A: The main integration path is UART, where the module returns unique hex values for recognized commands.

Q: What kinds of projects is this best for?
A: It works well as an edge voice control module for smart home devices, toys, appliances, embedded controls, and low-power local command systems.