{"product_id":"hc-05-wireless-bluetooth-transceiver-slave-module-rs232-ttl-uart","title":"HC-05 Bluetooth Transceiver Slave Module RS232 TTL UART","description":"\n\u003ch2\u003eHC-05 Wireless Bluetooth Transceiver Slave Module – RS232 \/ TTL \/ UART\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHC-05 Wireless Bluetooth Transceiver Slave Module\u003c\/strong\u003e is a compact, reliable serial communication module designed for makers, engineers, and electronics enthusiasts. Whether you're building a DIY Arduino project, designing a custom embedded system, or bridging serial devices wirelessly, this module delivers stable Bluetooth connectivity with easy RS232 \/ TTL \/ UART integration.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth 2.0 + EDR\u003c\/strong\u003e — reliable short-range wireless serial communication up to ~10 metres\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS232 \/ TTL \/ UART interface\u003c\/strong\u003e — seamlessly connects to microcontrollers, Arduino, Raspberry Pi, and other serial devices\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlave mode operation\u003c\/strong\u003e — pairs with a Bluetooth master device for straightforward, transparent data transfer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide operating voltage\u003c\/strong\u003e — 3.3 V logic level with onboard 3.3 V regulator (5 V tolerant supply input)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurable via AT commands\u003c\/strong\u003e — easily set baud rate, device name, PIN, and mode to suit your project\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact form factor\u003c\/strong\u003e — lightweight PCB design fits neatly into enclosures and breadboards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 3 colour options\u003c\/strong\u003e — choose the variant that best suits your build\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth Version:\u003c\/strong\u003e 2.0 + EDR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e RS232 \/ TTL UART\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault Baud Rate:\u003c\/strong\u003e 9600 bps (configurable via AT commands)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3 V (5 V tolerant supply)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLogic Level:\u003c\/strong\u003e 3.3 V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWireless Range:\u003c\/strong\u003e Up to ~10 m (open space)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMode:\u003c\/strong\u003e Slave (default)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAntenna:\u003c\/strong\u003e Onboard PCB antenna\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino, Raspberry Pi \u0026amp; ESP32 wireless serial projects\u003c\/li\u003e\n  \u003cli\u003eRobot control \u0026amp; automation prototyping\u003c\/li\u003e\n  \u003cli\u003eWireless sensor data logging\u003c\/li\u003e\n  \u003cli\u003eHome automation \u0026amp; IoT builds\u003c\/li\u003e\n  \u003cli\u003eSerial-to-Bluetooth bridge for legacy devices\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 Transceiver Slave Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor further information on Bluetooth standards and wireless communication technologies, visit the NIST Bluetooth Security Guide.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the HC-05 Bluetooth Transceiver Slave Module used for?\u003c\/h4\u003e\n\u003cp\u003eA: The HC-05 is a Bluetooth serial communication module that allows microcontrollers and other serial devices to send and receive data wirelessly over Bluetooth. It is widely used in Arduino, Raspberry Pi, and other embedded electronics projects that require a wireless RS232 \/ TTL \/ UART connection.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I connect the HC-05 module to an Arduino?\u003c\/h4\u003e\n\u003cp\u003eA: Connect the HC-05's TX pin to the Arduino's RX pin and the HC-05's RX pin to the Arduino's TX pin. Power the module with 3.3 V–5 V (VCC) and connect GND. Upload a serial sketch to the Arduino, then pair your smartphone or Bluetooth master device with the HC-05 (default PIN: 1234) to begin wireless serial communication.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I configure the HC-05 module's baud rate and device name?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The HC-05 supports AT command mode, which lets you change the baud rate, device name, pairing PIN, and operating mode. Enter AT command mode by holding the onboard button while powering on the module, then send AT commands via a serial terminal at 38400 bps.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the HC-05 module compatible with both Android and iOS devices?\u003c\/h4\u003e\n\u003cp\u003eA: The HC-05 uses Bluetooth Classic (2.0 + EDR), which is fully supported by Android devices. Most modern iOS devices prioritise Bluetooth Low Energy (BLE) and may have limited support for Bluetooth Classic serial profiles — a BLE module (such as HC-08 or HM-10) may be preferable for iOS-based projects.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the HC-05 Bluetooth Transceiver Slave Module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The HC-05 is a Bluetooth serial communication module that allows microcontrollers and other serial devices to send and receive data wirelessly over Bluetooth. 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