--- product_id: 740865097 title: "Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible" brand: "dfrobot" price: "£2807.04" currency: GBP in_stock: true url: https://www.desertcart.co.uk/products/740865097-gravity-offline-language-learning-voice-recognition-sensor-language-learning-voice store_origin: GB region: United Kingdom --- # I2C & UART plug & play Self-learning + 17 custom commands 121 fixed offline commands Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible **Brand:** dfrobot **Price:** £2807.04 **Availability:** ✅ In Stock ## Summary > 🎤 Own your voice, own your smart world. ## Quick Answers - **What is this?** Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible by dfrobot - **How much does it cost?** £2807.04 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/740865097-gravity-offline-language-learning-voice-recognition-sensor-language-learning-voice) ## Best For - dfrobot enthusiasts ## Why This Product - Trusted dfrobot brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Interactive:** Built-in mic and speaker deliver real-time feedback in a sleek 1.9 x 1.3 inch form factor. - • **121 Preloaded Commands:** Unlock powerful offline voice control without any network dependency or setup hassle. - • **Plug & Play Compatibility:** Seamlessly integrates with micro:bit, Arduino, and ESP32 for instant project upgrades. - • **Customizable Voice Triggers:** Add 17 unique commands including whistles or pet sounds for truly personalized automation. - • **Privacy-First Offline Processing:** Onboard MCU processes voice locally, ensuring zero data leaks or cloud uploads. ## Overview The Gravity Offline Language Learning Voice Recognition Sensor is a compact, privacy-focused module compatible with micro:bit, Arduino, and ESP32. Featuring 121 built-in offline commands plus 17 customizable triggers, it supports I2C and UART communication for plug-and-play integration. Its onboard MCU processes voice commands locally, eliminating the need for internet connectivity and protecting user privacy, while built-in microphone and speaker provide instant audio feedback. ## Description Full description not available ## Features - 【Easy to Use】: This voice recognition sensor is compatible with micro:bit, Arduino Uno, ESP32. It can be programmed using MakeCode and support plug and play function. At the same time, this voice recognition sensor also supports I2C and UART communication methods with gravity interface - 【Built-in 121 Fixed Command Words】: The offline voice recognition sensor has 121 fixed command words, no need to record their own voice. For example, the intelligent window system does not require manual operation of the window when rain or thunder starts to ring. Offline voice recognition module recognizes the pre-set command word "close the window" and automatically closes the window to respond to sudden weather changes - 【SELF-LEARNING FEATURE + 17 CUSTOM COMMANDS ADDITIONS】: This voice recognition module has self-learning function and can add 17 custom command words. Whether you want a whistle, snap, or even a cat cell, you can train as a command and and bring great flexibility to your interactive audio project. For example, automatic pet feeder. When the cat sounds and sounds the offline voice recognition module recognizes meower, triggers the bait box and automatically feeds the cat - 【NEWEST NEEDED】: This voice recognition sensor can be used without network connection, suitable for a variety of configurations. Quickly responds to specific commands and instructions In addition, the onboard MCU is equipped with voice recognition algorithms to enhance privacy and security by preventing conversations from being recorded or uploaded to the cloud - 【COMPACT SIZE INTEGRATED MICROPHONE AND SPEAKER】: Built-in speaker and external speaker interface, real-time voice feedback with recognition results. Compact size of only 1.9 x 1.3 inches (49 x 32 mm), convenient to install in applications ## Technical Specifications | Specification | Value | |---------------|-------| | Compatible Devices | micro:bit, Arduino, ESP32 | | Wireless Comm Standard | Bluetooth | | Batteries Included | No | | Batteries Required | No | | Brand | DFRobot | | Manufacturer | DFROBOT | | Item Model Number | SEN0539-EN | | Included Components | Internal Speaker and External Speaker Interface | | Connectivity Technology | I2C | | Product Dimensions | 4.9 x 3.2 x 3.2 cm; 20 g | ## Product Details - **Brand:** DFRobot - **Model Name:** AI Offline Language Learning Voice and Speech Recognition Module - **CPU Model:** Unknown - **Connectivity Technology:** I2C - **Included Components:** Internal Speaker and External Speaker Interface ## Images ![Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible - Image 1](https://m.media-amazon.com/images/I/61hi4u0rOEL.jpg) ![Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible - Image 2](https://m.media-amazon.com/images/I/61zDC8HS-XL.jpg) ![Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible - Image 3](https://m.media-amazon.com/images/I/61vS31cv6LL.jpg) ![Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible - Image 4](https://m.media-amazon.com/images/I/71SE5MdpG5L.jpg) ![Gravity: Offline Language Learning Voice Recognition Sensor Language Learning Voice Recognition Sensor - Offline for micro:bit/Arduino/ESP32, I2C & UART Compatible - Image 5](https://m.media-amazon.com/images/I/712HdcAoXKL.jpg) ## Frequently Bought Together - Gravity: Offline Language Learning Voice Recognition Sensor for micro:bit/Arduino / ESP32 - I2C & UART - WWZMDiB Voice Recognition Module V3 .1 Compatible with Arduino Elechouse Supports up to 80 Voice Commands - Arduino Uno REV3 [A000066] – ATmega328P Microcontroller, 16MHz, 14 Digital I/O Pins, 6 Analog Inputs, 32KB Flash, USB Connectivity, Compatible with Arduino IDE for DIY Projects and Prototyping --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/740865097-gravity-offline-language-learning-voice-recognition-sensor-language-learning-voice](https://www.desertcart.co.uk/products/740865097-gravity-offline-language-learning-voice-recognition-sensor-language-learning-voice) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*