{"product_id":"hc-08-4pin-bluetooth-module-without-button","title":"HC-08 4pin Bluetooth Module without Button","description":"\u003cmeta name=\"description\" content=\"Buy HC-08 4pin Bluetooth Module without Button online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003eHC-08 4pin Bluetooth Module without Button\u003c\/h1\u003e\n\n\u003cp\u003eThe HC-08 is a compact 4-pin Bluetooth Low Energy (BLE) module designed for wireless communication in embedded systems and IoT applications. Electronics engineers, IoT developers, and hobbyists use this module to add Bluetooth connectivity to microcontroller-based projects without requiring complex wireless protocols. This module solves the challenge of establishing reliable short-range wireless communication in resource-constrained applications where size and power consumption are critical factors.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe HC-08 operates on the Bluetooth 4.0 (BLE) standard, utilizing the 2.4 GHz ISM band for wireless transmission. Unlike its predecessor HC-05, the HC-08 is optimized for low-energy applications, making it ideal for battery-powered devices. The module features a simplified 4-pin interface (VCC, GND, TX, RX) that connects directly to UART ports on Arduino, STM32, PIC, and other microcontrollers. The absence of a pairing button reduces component count and PCB space, allowing for seamless integration into compact designs. Communication occurs through AT commands via serial interface, enabling straightforward configuration and data transmission at baud rates up to 115200.\u003c\/p\u003e\n\n\u003cp\u003eThe HC-08 module incorporates a high-performance Bluetooth chipset with an integrated antenna, delivering transmission range up to 100 meters in open space. The module operates at 3.3V logic levels with typical current consumption of 8-10mA during active transmission and sub-1mA in standby mode. Its pre-programmed firmware supports master and slave modes, allowing flexible network topology configuration. The module automatically handles Bluetooth pairing protocols, reducing firmware complexity on the host microcontroller. Built-in filtering and impedance matching ensure reliable signal integrity across various electromagnetic environments.\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\u003eBluetooth Low Energy (BLE) 4.0 Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHC (Zhejiang HC Information Technology)\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Configuration\u003c\/td\u003e\n\u003ctd\u003e4-pin (VCC, GND, TX, RX)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate\u003c\/td\u003e\n\u003ctd\u003e9600-115200 bps (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003eUp to 100 meters (open space)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e8-10mA (active), less than 1mA (standby)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Band\u003c\/td\u003e\n\u003ctd\u003e2.4 GHz ISM band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBluetooth 4.0 Low Energy standard with ultra-low power consumption ideal for battery-operated IoT devices and wearables\u003c\/li\u003e\n\u003cli\u003eSimplified 4-pin UART interface (VCC, GND, TX, RX) enabling direct connection to microcontroller serial ports without additional circuitry\u003c\/li\u003e\n\u003cli\u003eNo pairing button design reduces PCB footprint and component complexity, perfect for space-constrained embedded applications\u003c\/li\u003e\n\u003cli\u003eDual-mode operation supporting both master and slave configurations for flexible network topologies in wireless sensor networks\u003c\/li\u003e\n\u003cli\u003ePre-programmed firmware with AT command support for easy configuration of baud rate, device name, and communication parameters\u003c\/li\u003e\n\u003cli\u003eIntegrated antenna with impedance matching providing stable 100-meter transmission range in open environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWearable Health Monitoring Devices: Connect fitness trackers, heart rate monitors, and smartwatches to smartphones via BLE for real-time health data transmission with minimal power drain\u003c\/li\u003e\n\u003cli\u003eIoT Sensor Networks: Build distributed sensor nodes for environmental monitoring (temperature, humidity, air quality) that communicate wirelessly to a central gateway or cloud platform\u003c\/li\u003e\n\u003cli\u003eIndustrial Asset Tracking: Implement asset tracking systems in warehouses and manufacturing facilities using BLE beacons for location-based inventory management\u003c\/li\u003e\n\u003cli\u003eHome Automation Control: Create wireless control modules for smart lights, door locks, and appliances that communicate with mobile apps or voice assistants\u003c\/li\u003e\n\u003cli\u003eRobotics and Autonomous Systems: Enable wireless telemetry and control in autonomous robots, drones, and mobile platforms with real-time data feedback\u003c\/li\u003e\n\u003cli\u003eMedical Device Integration: Connect portable medical devices like glucose meters, blood pressure monitors, and pulse oximeters to healthcare management systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\u003cp\u003eTo integrate the HC-08 module into your project, establish a UART connection between the module's TX and RX pins and your microcontroller's RX and TX pins respectively. Power the module with 3.3V from a regulated supply and ensure proper GND connection. The module enters AT command mode by default, allowing you to configure parameters such as device name (AT+NAME), baud rate (AT+BAUD), and operating mode (AT+ROLE). After configuration, the module automatically enters data mode and broadcasts as a BLE peripheral device discoverable by nearby smartphones and tablets. Use serial communication libraries in Arduino IDE, STM32CubeIDE, or Python to send and receive data through the UART interface.\u003c\/p\u003e\n\n\u003cp\u003eFor reliable operation, implement proper voltage regulation to maintain 3.3V supply stability, as voltage fluctuations can cause communication errors. Add a 10uF capacitor close to the VCC pin to filter power supply noise. If your microcontroller operates at 5V logic levels, use a voltage divider or logic level shifter on the RX pin to protect the module's input. Test the connection using a terminal program like PuTTY or Arduino Serial Monitor by sending AT commands and verifying responses. Once paired with a mobile device, data transmission occurs transparently through the UART interface, making it suitable for real-time applications requiring wireless communication with minimal latency.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between HC-08 and HC-05 Bluetooth modules?\u003c\/summary\u003e\n\u003cp\u003eThe HC-08 uses Bluetooth 4.0 (BLE) technology optimized for low-power applications, while HC-05 uses classic Bluetooth 2.1 with higher power consumption. HC-08 is ideal for battery-powered IoT devices requiring extended runtime, whereas HC-05 suits applications needing longer range and higher data throughput. The HC-08 also features a simpler 4-pin interface without a pairing button, reducing component count and PCB complexity.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan HC-08 communicate with both iOS and Android devices?\u003c\/summary\u003e\n\u003cp\u003eYes, the HC-08 fully supports Bluetooth Low Energy (BLE) standard, which is natively supported by both iOS and Android platforms. You can develop mobile applications using iOS Swift, Objective-C, or Android Java\/Kotlin to communicate with the HC-08 module. Ensure your mobile app implements proper BLE scanning, connection, and characteristic read\/write procedures according to GATT (Generic Attribute Profile) specifications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum baud rate supported by HC-08?\u003c\/summary\u003e\n\u003cp\u003eThe HC-08 supports baud rates from 9600 to 115200 bps. The default baud rate is typically 9600 bps. You can change the baud rate using the AT+BAUD command followed by a parameter (1 for 9600, 2 for 19200, 3 for 38400, 4 for 57600, 5 for 115200). Higher baud rates reduce latency but require stable power supply and proper PCB layout to maintain signal integrity.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I configure the HC-08 module name and password?\u003c\/summary\u003e\n\u003cp\u003eUse AT commands to configure the module. Send AT+NAME=YourDeviceName to set the broadcast name (maximum 20 characters), and AT+PASS=YourPassword to set a 4-digit PIN code. After sending each command, the module responds with OK if successful. These settings persist in the module's non-volatile memory even after power cycling. Remember to exit AT command mode by powering off and on the module to apply changes.\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 Tech Depot\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 HC-08 4pin Bluetooth Module without Button Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eHC-08 4pin Bluetooth Module without Button\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eHC-08 4pin Bluetooth Module without Button\u003c\/strong\u003e with fast shipping and expert support.\u003c\/p\u003e\n\u003cp\u003eOur team in Bengaluru is available 24\/7 to support your journey from product selection to project completion.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48744395473153,"sku":"TTD-11146","price":845.88,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/ba679782fd9eb1b86515025c4b4d8a0a.jpg?v=1778073313","url":"https:\/\/techdepot.in\/products\/hc-08-4pin-bluetooth-module-without-button","provider":"Tech Depot India","version":"1.0","type":"link"}