HC-42D Bluetooth 5.0 BLE Serial Port Module
HC-42D Bluetooth 5.0 BLE Serial Port Module - Image 2
HC-42D Bluetooth 5.0 BLE Serial Port Module - Image 3
HC-42D Bluetooth 5.0 BLE Serial Port Module - Image 4
SKU: IOWC-0179
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HC-42D Bluetooth 5.0 BLE Serial Port Module

₹859.00 (Inclusive of all taxes)
Out of Stock

The HC-42D is a Bluetooth 5.0 BLE serial port module offering low-power wireless connectivity for IoT devices, featuring a UART interface and an integrated PCB antenna for simplified integration.

Features

  • Bluetooth 5.0 BLE protocol for low-power, short-range data transfer up to 40 meters.
  • Ultra-low shutdown current of 0.3μA enables multi-year battery life for sensor nodes.
  • Simple UART serial interface (TTL 1.8V-3.6V) for easy MCU integration without complex drivers.
  • Compact 37mm x 15.6mm footprint with integrated PCB antenna reduces design complexity.
  • Configurable RF output power from -40dBm to +4dBm for optimal range vs. power consumption.

Out of stock

Description

The HC-42D Bluetooth 5.0 BLE Serial Port Module is a digital transceiver designed for low-power IoT and embedded applications. Based on the Bluetooth Low Energy (BLE) v5.0 standard, it operates in the 2.4GHz ISM band using GFSK modulation, providing a reliable wireless link for transferring sensor data or control commands.

Engineered for minimal power draw, the module supports deep sleep modes with a shutdown current of just 0.3μA, making it suitable for battery-powered deployments. Its primary interface is a UART serial port, allowing straightforward communication with microcontrollers like Arduino, ESP32, or STM32, using standard AT commands or custom data framing for device pairing and data exchange.

Key Features

  • Implements Bluetooth 5.0 Low Energy (BLE) protocol for optimized power efficiency in intermittent data transmission scenarios.
  • Integrated PCB antenna eliminates the need for external antenna components, simplifying PCB layout and assembly.
  • Wide operating voltage range (1.8V to 3.6V) compatible with common 3.3V microcontroller logic levels.
  • Configurable air data rates of 1Mbps and 2Mbps, with a reference range of up to 40 meters at the higher rate.
  • Robust RF performance with a receiver sensitivity of -96dBm @ 1Mbps and adjustable transmit power.
  • Compact and lightweight form factor (37mm x 15.6mm x 4mm) for space-constrained designs.

Applications

  • Wireless sensor nodes for home automation (temperature, humidity, door/window sensors).
  • BLE beacons for indoor positioning, asset tracking, and proximity marketing.
  • Battery-powered remote controls, key fobs, and wearable device data links.
  • IoT gateway peripherals for adding BLE connectivity to Raspberry Pi or industrial controllers.
  • Wireless serial cable replacement for configuration, debugging, or data logging between devices.

Technical Specifications

Bluetooth ProtocolBLE 5.0
Frequency Band2.4GHz ISM
RF Transmit Power-40dBm to +4dBm (configurable)
Receiver Sensitivity-96dBm @ 1Mbps
Supply Voltage1.8V - 3.6V DC
Shutdown Current0.3μA
Communication InterfaceUART (TTL)
Logic Level1.8V - 3.6V
AntennaIntegrated PCB Antenna
Operating Temperature-25°C to +75°C
Dimensions (L x W x H)37mm x 15.6mm x 4mm

Frequently Asked Questions

How do I communicate with the HC-42D module from an Arduino?

Connect the module's UART TX and RX pins to your Arduino's RX and TX pins respectively, using a logic level shifter if your Arduino operates at 5V. Power the module with 3.3V. Use a serial library like SoftwareSerial to send AT commands (e.g., AT+NAME to set device name) for configuration and transparent data mode for sending your application data packets wirelessly to a paired BLE device.

What is the typical power consumption during active transmission?

While exact active current depends on configured transmit power, expect an average operating current in the low milliampere range during RF activity. The key to long battery life is leveraging the module's deep sleep mode, which draws only 0.3 microamps. Design your firmware to wake the module via a GPIO pin or UART data, transmit data quickly, and then command it back to sleep to minimize duty cycle and maximize battery lifespan.

Can I increase the wireless range beyond 40 meters?

The reference 40-meter range is achieved under open-space conditions at 2Mbps data rate and +4dBm transmit power. To potentially extend range, ensure the module is configured for maximum output power (+4dBm) and the lowest data rate (1Mbps) for better sensitivity. Environmental factors like walls and interference significantly affect range. For dedicated long-range BLE applications, consider a module with an external antenna connector for a higher-gain antenna.

Package Includes

  • 1 x HC-42D Bluetooth 5.0 BLE Serial Port Module

Additional Information

Weight 0.002 kg
Dimensions 3.7 × 1.56 × 0.4 cm

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