{"product_id":"ai-thinker-esp32-audio-kit-serial-to-wi-fi-development-board","title":"Ai-Thinker ESP32-Audio-Kit Serial to WI-FI Development Board","description":"\u003cmeta name=\"description\" content=\"Buy Ai-Thinker ESP32-Audio-Kit Serial to WI-FI Development Board online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003eAi-Thinker ESP32-Audio-Kit Serial to WI-FI Development Board\u003c\/h1\u003e\n\n\u003cp\u003eThe Ai-Thinker ESP32-Audio-Kit is a comprehensive development board combining the powerful ESP32 dual-core processor with integrated audio processing capabilities, enabling seamless Serial-to-WiFi communication for IoT and embedded audio applications. Professional embedded systems engineers, IoT developers, and audio signal processing specialists use this board to prototype voice-controlled devices, smart speakers, audio streaming applications, and wireless sensor networks with minimal development overhead. This board solves the critical challenge of integrating WiFi connectivity with real-time audio processing while maintaining low power consumption and providing extensive GPIO expansion for peripheral integration.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Ai-Thinker ESP32-Audio-Kit operates on the ESP32 SoC architecture, featuring a dual-core Tensilica LX6 processor running at 240MHz with integrated 520KB SRAM and 4MB flash memory. The board incorporates an onboard audio codec with integrated amplifier, stereo speaker connectors, and microphone input with automatic gain control, enabling direct audio capture and playback without external audio interfaces. The Serial-to-WiFi bridge functionality allows legacy serial devices to communicate over WiFi networks, making it ideal for retrofitting industrial equipment and IoT sensor arrays with wireless capabilities while maintaining backward compatibility with existing serial protocols.\u003c\/p\u003e\n\n\u003cp\u003eWhat distinguishes this development board is its integrated audio subsystem combined with robust WiFi 802.11 b\/g\/n connectivity and Bluetooth 4.2 support, eliminating the need for separate audio codec modules in many applications. The board features a comprehensive pin header layout providing access to 34 GPIO pins, multiple SPI and I2C interfaces, three UART channels, and analog input capabilities through a 12-bit SAR ADC. Built-in USB-UART bridge simplifies programming and serial communication, while the onboard 3.3V regulator with USB power input ensures stable operation for connected peripherals and audio amplification circuits.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWiFi Audio Development Board with Serial Bridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAi-Thinker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 days on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping\u003c\/td\u003e\n\u003ctd\u003e1-5 days from Bengaluru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003e7-8 days across India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e24\/7 via Email and WhatsApp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Processor\u003c\/td\u003e\n\u003ctd\u003eESP32 Dual-Core Xtensa 32-bit LX6 at 240MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory\u003c\/td\u003e\n\u003ctd\u003e520KB SRAM, 4MB Flash Memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi Connectivity\u003c\/td\u003e\n\u003ctd\u003e802.11 b\/g\/n, 2.4GHz band, 150Mbps data rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBluetooth\u003c\/td\u003e\n\u003ctd\u003eBluetooth 4.2 with BLE support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio Codec\u003c\/td\u003e\n\u003ctd\u003eIntegrated stereo codec with built-in amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGPIO Pins\u003c\/td\u003e\n\u003ctd\u003e34 GPIO pins with multiple peripheral interfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003e3x UART, 2x SPI, 2x I2C channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input\u003c\/td\u003e\n\u003ctd\u003e12-bit SAR ADC with 8 channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003eUSB 5V input with onboard 3.3V regulator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V logic level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDual-core ESP32 processor at 240MHz with independent task scheduling for simultaneous WiFi and audio processing without performance degradation\u003c\/li\u003e\n\u003cli\u003eIntegrated audio codec with stereo microphone input and dual speaker output connectors enabling direct voice capture and playback for smart speaker and voice assistant applications\u003c\/li\u003e\n\u003cli\u003eSerial-to-WiFi bridge functionality allowing legacy RS232 and TTL serial devices to transmit data over WiFi networks with transparent protocol conversion\u003c\/li\u003e\n\u003cli\u003eBuilt-in USB-UART programming interface with automatic bootloader detection eliminating the need for external FTDI modules or manual boot mode selection\u003c\/li\u003e\n\u003cli\u003eComprehensive GPIO expansion with 34 accessible pins supporting PWM, ADC, capacitive touch, and SPI\/I2C slave modes for extensive peripheral integration\u003c\/li\u003e\n\u003cli\u003eLow power consumption modes including deep sleep at 10uA enabling battery-powered IoT deployments with extended operational lifetime\u003c\/li\u003e\n\u003cli\u003eFCC and CE certified wireless modules ensuring regulatory compliance for commercial product deployment across international markets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVoice-controlled IoT devices and smart home hubs utilizing the integrated audio codec for microphone input processing and speaker output amplification with WiFi cloud connectivity\u003c\/li\u003e\n\u003cli\u003eIndustrial equipment retrofitting with Serial-to-WiFi conversion for legacy PLC systems, SCADA devices, and sensor arrays requiring wireless communication without protocol modification\u003c\/li\u003e\n\u003cli\u003eAudio streaming applications including networked music players, wireless microphone systems, and real-time audio monitoring stations leveraging dual-core processing for simultaneous encoding and transmission\u003c\/li\u003e\n\u003cli\u003eWireless sensor networks combining analog signal acquisition through ADC channels with WiFi transmission for environmental monitoring, industrial IoT, and research data collection\u003c\/li\u003e\n\u003cli\u003eBluetooth audio peripherals and BLE mesh networks for wearable devices, hearing aids, and personal audio equipment requiring low-power wireless connectivity\u003c\/li\u003e\n\u003cli\u003eEducational embedded systems projects teaching WiFi networking, real-time audio processing, and IoT protocol implementation with comprehensive Arduino and MicroPython support\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003cp\u003eBegin by installing the CH340 USB driver on your development machine to establish communication with the onboard USB-UART bridge. Connect the ESP32-Audio-Kit to your computer via USB cable, and the board will automatically enter programming mode. Download the latest ESP-IDF or Arduino IDE with ESP32 board support, then configure the board settings selecting ESP32 Dev Module with 240MHz CPU frequency and 4MB flash size. The integrated audio codec is accessed through the I2S peripheral interface, allowing you to configure microphone input with automatic gain control and speaker output amplification through simple register configuration in your firmware code.\u003c\/p\u003e\n\n\u003cp\u003eFor Serial-to-WiFi applications, configure UART0 or UART1 with your desired baud rate and protocol parameters, then use the WiFi API to establish TCP\/UDP socket connections to your target server or cloud platform. The board supports transparent serial bridging where incoming serial data is automatically forwarded to a configured IP address and port, enabling immediate integration with legacy systems. Utilize the dual-core architecture by assigning audio processing tasks to core 0 and WiFi communication tasks to core 1, ensuring neither subsystem blocks the other. Power the board through the USB connector for development, or connect external 5V supply to the dedicated power input for standalone deployment with connected audio speakers and microphone peripherals.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan the ESP32-Audio-Kit process audio in real-time while transmitting over WiFi?\u003c\/summary\u003e\n\u003cp\u003eYes, the dual-core architecture enables simultaneous audio processing and WiFi communication without performance loss. Core 0 handles I2S audio codec operations while Core 1 manages WiFi stack and network transmission. The 240MHz processor speed and 520KB SRAM provide sufficient resources for real-time audio buffering, compression, and network packet processing simultaneously. Audio latency typically remains below 100ms for streaming applications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum WiFi transmission range and data rate?\u003c\/summary\u003e\n\u003cp\u003eThe ESP32 WiFi module achieves approximately 100-150 meters range in open space with 150Mbps maximum data rate on 802.11n connections. Actual range depends on antenna orientation, environmental interference, and WiFi router specifications. For Serial-to-WiFi bridge applications, typical throughput reaches 1-2 Mbps sustained transmission with sub-millisecond latency on local networks.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I configure the Serial-to-WiFi bridge functionality?\u003c\/summary\u003e\n\u003cp\u003eConfigure UART pins and baud rate in your firmware, then establish WiFi connection and create a TCP socket to your target server IP and port. Use FreeRTOS tasks to read incoming serial data from the UART buffer and transmit it to the socket, while simultaneously reading socket data and writing to UART output. The AT command firmware provided by Ai-Thinker offers pre-configured transparent bridging mode for quick deployment without custom code.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat audio formats and sample rates does the integrated codec support?\u003c\/summary\u003e\n\u003cp\u003eThe onboard audio codec supports 8kHz to 48kHz sample rates with 16-bit PCM audio format. Stereo microphone input and dual-channel speaker output are available simultaneously. For compressed audio transmission, you can implement MP3 or AAC encoding in firmware using available libraries, though real-time encoding at higher sample rates requires careful CPU scheduling between audio and WiFi tasks.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs external amplification needed for speaker output?\u003c\/summary\u003e\n\u003cp\u003eThe integrated audio codec includes a built-in amplifier capable of driving 8-ohm speakers at moderate volume levels suitable for small devices and notifications. For high-volume applications or larger speakers exceeding 2 watts, connect an external Class D amplifier to the audio output pins. The amplifier output impedance is approximately 32 ohms, compatible with standard 8-ohm and 16-ohm speaker systems.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eOrders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return and warranty policy?\u003c\/summary\u003e\n\u003cp\u003eWe offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eWhy Buy from The Engineer Store\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Products: Sourced directly from authorized distributors with authentication\u003c\/li\u003e\n\u003cli\u003eExpert Team: Our technical team validates every product before listing\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003ePan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata\u003c\/li\u003e\n\u003cli\u003ePayment Options: COD, UPI, credit\/debit cards, net banking, EMI available\u003c\/li\u003e\n\u003cli\u003eTechnical Support: 24\/7 expert guidance via email and WhatsApp\u003c\/li\u003e\n\u003cli\u003eReturns: 7-day return policy on manufacturing defects only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuy Ai-Thinker ESP32-Audio-Kit Serial to WI-FI Development Board Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eAi-Thinker ESP32-Audio-Kit Serial to WI-FI Development Board\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer\u003c\/a\u003e\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43847437680803,"sku":"TES-EV00006019","price":1452.84,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/ESP32-Audio-Kit-3-314x252.jpg?v=1703853588","url":"https:\/\/www.theengineerstore.in\/zh-hans\/products\/ai-thinker-esp32-audio-kit-serial-to-wi-fi-development-board","provider":"The Engineer Store","version":"1.0","type":"link"}