4pcs Robojax HC-05 Bluetooth Serial Pass-Through Module Wireless Serial Communication for Arduino (4pcs HC-05)
$75.80
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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.”
Our Review
After integrating the 4pcs Robojax HC-05 Bluetooth Serial Pass-Through Module Wireless Serial Communication for Arduino (4pcs HC-05) into several test builds, we found it to be a capable component for the price. Key specs include Protocol: Bluetooth 4.2 BLE, Range: up to 30m, Interface: I2C.
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 4pcs Robojax HC-05 Bluetooth Serial Pass-Through Module Wireless Serial Communication for Arduino (4pcs HC-05) delivers what you need without unnecessary complexity. Recommended for hobbyists and engineers working on projects where communication modules components are essential.
What We Like
- Long range communication reduces infrastructure costs
- Low power consumption extends battery life in remote nodes
- Mesh networking capability for multi-node deployments
- License-free ISM band operation in most regions
Watch Out For
- Requires paired module on the receiving end
- Antenna placement affects range significantly
- Regulatory restrictions vary by country and frequency
Specifications
| Protocol | Bluetooth 4.2 BLE |
| Range | up to 30m |
| Interface | I2C |
| Data Rate | 3 Mbps |
| Operating Voltage | 3.3V |
| Profiles | SPP (Serial Port) |
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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