{"product_id":"hc-05-bluetooth-transceiver-module-master-slave-6pin-serial","title":"HC-05 Bluetooth Transceiver Module – Master\/Slave 6-Pin","description":"\n\u003ch2\u003eHC-05 RF Wireless Bluetooth Transceiver Module (JY-MCU, 6-Pin)\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHC-05 Bluetooth Serial Pass-Through Module\u003c\/strong\u003e is a versatile, dual-mode wireless transceiver board designed for makers, engineers, and electronics enthusiasts. Whether you're building a DIY robotics project, a GPS navigation system, or a smart meter reading setup, this compact module delivers reliable Bluetooth V2.0 serial communication between microcontrollers, PCs, PDAs, and smartphones — right out of the box.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Master\/Slave Mode:\u003c\/strong\u003e Configurable as either a Bluetooth master or slave module, giving you maximum flexibility for your project.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCSR Mainstream Bluetooth Chip:\u003c\/strong\u003e Uses the industry-standard CSR chipset with Bluetooth V2.0 protocol for stable, proven wireless connectivity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Voltage Range:\u003c\/strong\u003e Accepts 3.3 V to 6 V input — compatible with Arduino, Raspberry Pi, and most common microcontroller platforms. \u003cem\u003eDo not exceed 7 V.\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOnboard 3.3 V Regulation:\u003c\/strong\u003e Features a 150 mA \/ 3.3 V onboard regulator chip for clean, stable power delivery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault Baud Rate 9600:\u003c\/strong\u003e Pre-configured at 9600 baud and fully user-adjustable via AT commands.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Status Indicator:\u003c\/strong\u003e Built-in LED shows connection status at a glance — pulsing when unconnected, steady high when paired and communicating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRe-Search Button:\u003c\/strong\u003e Onboard button (and MCU-controllable high-level input) lets you trigger a fresh device scan without reprogramming.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-Reverse Protection Design:\u003c\/strong\u003e 6-pin JY-MCU backboard layout helps prevent incorrect power connections.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Pin Breakout:\u003c\/strong\u003e Exposes VCC, GND, TXD, RXD, STATE, and EN\/KEY pins for easy wiring and integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Core module: 28 mm × 15 mm × 2.35 mm | Board size: 15.5 mm × 39.8 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"text-align:left;padding:8px;border:1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:8px;border:1px solid #ddd;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBluetooth Version\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eV2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e3.3 V – 6 V (max 7 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eWorking Current (Pairing)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e~30 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eWorking Current (Connected)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e~8 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eDefault Baud Rate\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e9600 bps (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eCore Module Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e28 mm × 15 mm × 2.35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBoard Size\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e15.5 mm × 39.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eChipset\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eCSR\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMode\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMaster \/ Slave (configurable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino, Raspberry Pi \u0026amp; microcontroller projects\u003c\/li\u003e\n  \u003cli\u003eGPS navigation systems\u003c\/li\u003e\n  \u003cli\u003eWater, electricity \u0026amp; gas meter reading systems\u003c\/li\u003e\n  \u003cli\u003eWireless serial data communication\u003c\/li\u003e\n  \u003cli\u003ePC, laptop, PDA \u0026amp; smartphone Bluetooth pairing\u003c\/li\u003e\n  \u003cli\u003eRobotics \u0026amp; automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInput voltage must not exceed 7 V — damage may result.\u003c\/li\u003e\n  \u003cli\u003eThis board does \u003cstrong\u003enot\u003c\/strong\u003e have automatic reverse-polarity protection — always connect power correctly.\u003c\/li\u003e\n  \u003cli\u003eThe board alone has no Bluetooth functionality; a compatible Bluetooth module must be installed.\u003c\/li\u003e\n  \u003cli\u003eDefault configuration is slave mode; master mode requires AT command configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HC-05 Bluetooth Module with JY-MCU Backboard\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between master and slave mode on the HC-05 Bluetooth module?\u003c\/h4\u003e\n\u003cp\u003eA: In \u003cstrong\u003eslave mode\u003c\/strong\u003e (the default setting), the HC-05 waits for another Bluetooth device — such as a smartphone, PC, or another master Bluetooth module — to initiate the connection. In \u003cstrong\u003emaster mode\u003c\/strong\u003e, the module actively scans for and connects to nearby slave devices. You can switch between modes using AT commands via the serial interface. This makes the HC-05 one of the most flexible Bluetooth serial modules available for DIY and professional electronics projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the HC-05 module compatible with Arduino?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the HC-05 Bluetooth transceiver module is fully compatible with Arduino boards and most other 3.3 V – 5 V microcontroller platforms, including Raspberry Pi (with a level shifter). Simply connect VCC, GND, TXD, and RXD to your board's corresponding pins and configure the baud rate to match your project's serial settings (default is 9600 bps).\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can two HC-05 modules communicate directly with each other?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — when one HC-05 is set to \u003cstrong\u003emaster mode\u003c\/strong\u003e and the other is set to \u003cstrong\u003eslave mode\u003c\/strong\u003e, the two modules can pair and communicate seamlessly. Note that two slave modules or two master modules cannot pair directly with each other. One must be configured as master and the other as slave for a successful connection.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage should I use to power the HC-05 module?\u003c\/h4\u003e\n\u003cp\u003eA: The HC-05 accepts an input voltage between \u003cstrong\u003e3.3 V and 6 V\u003c\/strong\u003e. The onboard 3.3 V \/ 150 mA regulator handles power conversion internally. \u003cstrong\u003eNever exceed 7 V\u003c\/strong\u003e, as this can permanently damage the module. Always double-check your power supply polarity before connecting, as the board does not include automatic reverse-polarity protection.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between master and slave mode on the HC-05 Bluetooth module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"In slave mode (the default setting), the HC-05 waits for another Bluetooth device — such as a smartphone, PC, or another master Bluetooth module — to initiate the connection. In master mode, the module actively scans for and connects to nearby slave devices. You can switch between modes using AT commands via the serial interface. 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Always double-check your power supply polarity before connecting, as the board does not include automatic reverse-polarity protection.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"HC-05 Bluetooth Transceiver Module – Master\/Slave 6-Pin\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/products\/hc-05-bluetooth-transceiver-module-master-slave-6pin-serial\"}]}\u003c\/script\u003e","brand":"Quake","offers":[{"title":"HC05","offer_id":50287262073059,"sku":"14:200001438#HC05","price":20.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/9439\/1523\/files\/Sa32781c5a4f0416081ef5775769095ac8.webp?v=1790295229","url":"https:\/\/quakegoods.com\/products\/hc-05-bluetooth-transceiver-module-master-slave-6pin-serial","provider":"Quake","version":"1.0","type":"link"}