SeeedStudio Grove Serial Bluetooth v3.0
SeeedStudio Grove Serial Bluetooth v3.0
SeeedStudio Grove Serial Bluetooth v3.0
The SeeedStudio Grove Serial Bluetooth v3.0 is a wireless serial communication module that enables UART-based Bluetooth connectivity for microcontroller projects through the standardized Grove connector interface. Electronics engineers, IoT developers, and roboticists use this module to add wireless serial capabilities to Arduino, Raspberry Pi, and other development platforms without complex wiring. This module solves the challenge of implementing reliable wireless data transmission over short-to-medium distances while maintaining the simplicity of serial UART protocol that most embedded systems already support.
Product Overview
The Grove Serial Bluetooth v3.0 operates as a transparent serial-to-wireless bridge, converting UART signals from your microcontroller into Bluetooth Classic (v3.0) wireless packets and vice versa. The module uses the HC-05 chipset internally, which implements the Bluetooth 2.1 EDR standard with a range of up to 100 meters in open space. The Grove connector eliminates the need for breadboard prototyping or soldering, allowing engineers to connect the module directly to Grove-compatible boards with a single cable. The module operates at 3.3V logic levels with onboard voltage regulation, making it compatible with both 3.3V and 5V microcontroller platforms through proper level shifting on the TX/RX lines.
What distinguishes this module is its plug-and-play Grove integration combined with proven HC-05 reliability for master-slave Bluetooth pairing scenarios. The module features configurable baud rates from 1200 to 115200 bps, allowing developers to match their microcontroller's serial communication speed. It includes AT command support for configuration of device name, pairing PIN, and communication parameters without requiring firmware uploads. The onboard LED indicator provides visual feedback for connection status, helping developers quickly diagnose pairing and communication issues during development and troubleshooting phases.
Key Specifications
| Specification | Details |
| Product Type | Grove Serial Bluetooth Module |
| Brand | SeeedStudio |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Bluetooth Standard | Bluetooth 2.1 EDR (v3.0) |
| Chipset | HC-05 |
| Operating Voltage | 3.3V to 5V (with level shifting) |
| Baud Rate Range | 1200 to 115200 bps |
| Wireless Range | Up to 100 meters (open space) |
| Connector Type | Grove 4-pin Standard |
Key Features
- Grove Connector Interface: Direct plug-and-play connection to Grove-compatible boards eliminates breadboarding and soldering, reducing prototyping time from hours to minutes
- HC-05 Chipset: Industry-standard Bluetooth Classic module with proven reliability in thousands of IoT and robotics projects worldwide
- Configurable Baud Rates: Support for 1200 to 115200 bps allows seamless integration with any microcontroller's UART peripheral configuration
- AT Command Configuration: Change device name, PIN code, and communication parameters via simple ASCII commands without firmware modifications
- LED Status Indicator: Visual feedback for power, pairing, and connection status enables rapid debugging during development phases
- Master-Slave Capability: Can operate as either master or slave device, supporting both point-to-point and one-to-many communication topologies
Applications and Use Cases
- Wireless Robot Control: Enable Arduino-based robots to receive commands from mobile apps or wireless controllers via Bluetooth serial link, eliminating tether cables and enabling autonomous navigation
- IoT Sensor Data Logging: Connect wireless sensor nodes to central data collection hubs, allowing distributed environmental monitoring systems to transmit temperature, humidity, and pressure data over Bluetooth
- Mobile App Integration: Pair with Android or iOS applications to create interactive projects where smartphone sensors trigger microcontroller actions or display real-time telemetry data
- Wireless Debugging Interface: Replace USB cables during development by establishing Bluetooth serial connection for firmware debugging, parameter tuning, and real-time sensor visualization
- Home Automation Prototyping: Build wireless smart home controllers that communicate with ESP8266, Arduino, or STM32 boards to manage lighting, temperature, and security systems
How to Use
Begin by connecting the Grove Serial Bluetooth v3.0 module to your microcontroller board using the Grove connector cable. On Arduino boards, connect to the hardware UART pins (RX0/TX0) or use SoftwareSerial on any digital pins. Configure your Arduino sketch to initialize serial communication at the module's default baud rate of 9600 bps, then send AT commands to configure the device name and PIN if needed. For example, sending AT+NAME=MyDevice will rename the Bluetooth device, and AT+PSWD=1234 will set the pairing PIN. Once configured, the module automatically enters transparent mode where any data sent via serial UART is transmitted wirelessly to the paired Bluetooth device.
To establish a wireless connection, pair the module with your smartphone or another Bluetooth device using its standard Bluetooth settings menu. After successful pairing, open a Bluetooth serial terminal application on your mobile device and select the module from the available devices. Data transmitted from your microcontroller's UART will appear in the terminal, and any text entered in the terminal will be received by your microcontroller as serial data. This transparent serial bridge approach allows you to use existing UART-based code without modifications, making integration straightforward for developers familiar with serial communication protocols.
Frequently Asked Questions
What is the difference between HC-05 and HC-06 modules, and why use this v3.0 version?
The HC-05 used in this module operates as both master and slave, allowing it to initiate connections to other Bluetooth devices or accept incoming connections. The HC-06 operates only as a slave. The v3.0 designation indicates Bluetooth 2.1 EDR compliance with improved power efficiency and faster connection establishment compared to earlier versions. For most projects requiring flexible connectivity options, the HC-05 master-slave capability makes this module more versatile than HC-06 alternatives.
Can I use this module with 5V microcontrollers like Arduino Uno?
Yes, but with important caveats. The module operates at 3.3V logic levels, so the RX pin must be protected with a voltage divider or level shifter to prevent damage from 5V signals. The TX output at 3.3V is generally safe for 5V microcontroller inputs due to their higher input thresholds. We recommend using a simple resistor divider on RX (10k and 20k resistors) or a dedicated logic level converter IC for reliable operation and maximum module lifespan.
How do I change the baud rate from the default 9600 bps?
Send the AT command AT+UART=115200,0,0 to configure the module to 115200 bps. The format is AT+UART=baud,stopbits,parity. Common baud rates are 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps. After sending the command, you must reconfigure your microcontroller's UART to match the new baud rate. The module will remember the setting after power cycling, so you only need to configure it once during initial setup.
What is the maximum wireless range of this Bluetooth module?
The theoretical maximum range is 100 meters in open space with clear line of sight and minimal RF interference. In typical indoor environments with walls and obstacles, expect practical range of 10-30 meters depending on building materials and competing wireless devices. Range decreases significantly in environments with high RF interference from WiFi routers, microwave ovens, and other 2.4 GHz devices. For applications requiring extended range, consider external antenna modules or mesh networking approaches.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We 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.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Tech Depot
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- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy SeeedStudio Grove Serial Bluetooth v3.0 Online in India
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