{"product_id":"hc-05-bluetooth-serial-module-master-slave-mode-uart-arduino-compatible-wireless-communication","title":"HC-05 Bluetooth Serial Module – Master \u0026 Slave Mode | UART | Arduino Compatible | Wireless Communication","description":"\u003cp\u003eHC-05 Bluetooth Serial Module – Master\/Slave Wireless Module\u003c\/p\u003e\n\u003cp\u003eThe HC-05 is a powerful and versatile Bluetooth serial module \u003cbr\u003edesigned for wireless UART communication in Arduino, microcontroller, \u003cbr\u003eand DIY electronics projects. Unlike basic Bluetooth modules, the HC-05 \u003cbr\u003esupports both Master and Slave modes — giving you full control over \u003cbr\u003ehow devices connect and communicate wirelessly.\u003c\/p\u003e\n\u003cp\u003e📡 KEY SPECIFICATIONS:\u003c\/p\u003e\n\u003cp\u003e- Bluetooth Version: v2.0 + EDR (Enhanced Data Rate)\u003cbr\u003e- Operating Mode: Master \u0026amp; Slave (switchable via AT commands)\u003cbr\u003e- Frequency: 2.4 GHz ISM Band\u003cbr\u003e- Modulation: GFSK\u003cbr\u003e- Max Data Speed: 2.1 Mbps\u003cbr\u003e- Communication Range: Up to 10 meters (open space)\u003cbr\u003e- Operating Voltage: 3.3V – 6V (5V tolerant)\u003cbr\u003e- Operating Current: 30–40 mA\u003cbr\u003e- Default Baud Rate: 9600 bps (Normal) | 38400 bps (AT Mode)\u003cbr\u003e- Default PIN: 1234\u003cbr\u003e- Interface: UART (TX, RX, VCC, GND, EN, STATE)\u003cbr\u003e- Chip: CSR BC417\u003cbr\u003e- AT Commands: 40+ commands supported\u003c\/p\u003e\n\u003cp\u003e✅ KEY FEATURES:\u003c\/p\u003e\n\u003cp\u003e- Supports Master Mode – can initiate connections to other devices\u003cbr\u003e- Supports Slave Mode – accepts connections from phones\/PC\u003cbr\u003e- Configurable via AT Commands (name, baud rate, PIN, mode)\u003cbr\u003e- Auto-reconnect to last paired device\u003cbr\u003e- LED status indicator (fast blink = data mode, slow blink = AT mode)\u003cbr\u003e- KEY\/EN pin for entering AT configuration mode\u003cbr\u003e- Works with Android \u0026amp; Windows (not iOS)\u003cbr\u003e- Compatible with Arduino, STM32, PIC, Raspberry Pi\u003c\/p\u003e\n\u003cp\u003e📌 PINOUT:\u003cbr\u003eVCC | GND | TXD | RXD | EN (KEY) | STATE\u003c\/p\u003e\n\u003cp\u003e🛠️ APPLICATIONS:\u003cbr\u003e- Arduino to Arduino wireless communication\u003cbr\u003e- Bluetooth robot \u0026amp; car control\u003cbr\u003e- Wireless sensor data logging\u003cbr\u003e- Home automation systems\u003cbr\u003e- Wireless serial monitor\u003cbr\u003e- RC remote control systems\u003cbr\u003e- DIY Bluetooth joystick\/gamepad\u003c\/p\u003e\n\u003cp\u003e📦 PACKAGE INCLUDES:\u003cbr\u003e- 1 x HC-05 Bluetooth Serial Module\u003c\/p\u003e\n\u003cp\u003e⚠️ NOTE:\u003cbr\u003eHC-05 RX pin operates at 3.3V logic. Use a voltage divider \u003cbr\u003ewhen connecting to a 5V Arduino TX pin to protect the module.\u003cbr\u003eDefault pairing PIN: 1234\u003c\/p\u003e","brand":"SI ROBOTICS","offers":[{"title":"Default Title","offer_id":47386766966915,"sku":"BT-HC05-UART\/BT-HC06-UART","price":1200.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2387\/9299\/files\/WhatsAppImage2026-06-29at11.08.40PM_1.jpg?v=1782771179","url":"https:\/\/sirobotics.store\/products\/hc-05-bluetooth-serial-module-master-slave-mode-uart-arduino-compatible-wireless-communication","provider":"SI ROBOTICS","version":"1.0","type":"link"}