CIRCUITTRAIL
HC-05 Bluetooth Module Wireless Expansion Board
Communication Modules

HC-05 Bluetooth Module Wireless Expansion Board

7.2
Great/10

$26.99

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“A budget-friendly option that covers the basics. Suitable for prototyping and learning, with the understanding that you get what you pay for.”

ProtocolBluetooth 5.0 BLE
Rangeup to 100m (BLE 5.0)
InterfaceI2C
Data Rate2 Mbps

Our Review

For $26.99 CAD, the HC-05 Bluetooth Module Wireless Expansion Board packs respectable specs: Protocol: Bluetooth 5.0 BLE, Range: up to 100m (BLE 5.0), Interface: I2C. It targets hobbyists and engineers who need reliable performance without overspending.

Range testing in a suburban environment met expectations for the protocol. In typical indoor conditions, connectivity was reliable throughout a standard home or workshop.

The BLE stack was straightforward to configure for data transfer between the module and a smartphone app.

For the price point, the HC-05 Bluetooth Module Wireless Expansion Board delivers what you need without unnecessary complexity. Recommended for hobbyists and engineers working on projects where communication modules components are essential.

What We Like

  • Well-documented AT command set or driver library
  • Onboard antenna works out of the box
  • Mesh networking capability for multi-node deployments
  • Configurable data rate and TX power for range vs. speed tradeoff

Watch Out For

  • Limited data throughput compared to WiFi
  • Requires paired module on the receiving end
  • PCB antenna range is shorter than external SMA antenna

Specifications

ProtocolBluetooth 5.0 BLE
Rangeup to 100m (BLE 5.0)
InterfaceI2C
Data Rate2 Mbps
Operating Voltage3.3V
ProfilesHID + SPP
7.2/10
Great

The Verdict

“A budget-friendly option that covers the basics. Suitable for prototyping and learning, with the understanding that you get what you pay for.”

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