Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Sensor Type | Optical PPG (Photoplethysmography) |
| Measurement Metrics | Heart Rate, HRV, Relaxation Index |
| Interface Protocol | UART / TTL Serial |
| Operating Voltage | 3.3V - 5.0V DC |
| Form Factor | Ear Clip Module |
| Wavelength | Green LED (525nm) |
| Sampling Rate | Adjustable up to 100Hz |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
| Cable Length | 1.2 Meters Shielded Wire |
| Application Scope | Secondary Development & Prototyping |
Anonymous
Mar 29, 2026
Rating: 5/5
Excellent documentation support
I was worried about the secondary development aspect, but the provided protocol examples made it simple to parse the serial data. Highly recommended for engineers.
Anonymous
Mar 23, 2026
Rating: 4/5
Good signal, needs calibration
The hardware quality is solid. I had to tweak the gain settings in my code to get optimal readings for my specific use case, but once calibrated, it works very well for relaxation training apps.
Anonymous
Mar 22, 2026
Rating: 4/5
Compact and reliable
The ear clip design is comfortable for short-term testing sessions. It stays in place well. The only downside is the cable could be slightly more flexible, but overall a great module.
Anonymous
Mar 17, 2026
Rating: 5/5
Perfect for DIY Health Projects
This ear clip sensor is incredibly easy to integrate with my ESP32 project. The PPG signal is clean, and the HRV data seems consistent when compared to my chest strap. Great for prototyping.
Anonymous
Mar 15, 2026
Rating: 3/5
Works but sensitive to movement
It works great when sitting still, which is good for relaxation training. However, if you move your head too much during development testing, the signal can get noisy. Expected for optical sensors though.
Anonymous
Mar 11, 2026
Rating: 5/5
Great value for money
Compared to other optical sensors on the market, this offers excellent value. The real-time heart rate detection is fast and accurate enough for my fitness dashboard prototype.
Q: What is the maximum distance the cable can be extended?
A: While the standard cable is 1.2 meters, you can extend it using shielded twisted pair wires. We recommend keeping the total length under 3 meters to prevent signal degradation.
Q: Is the output data raw PPG waveform or just calculated BPM?
A: The module outputs both. You can configure the UART stream to receive the raw PPG waveform data for custom algorithm development, or simply request the calculated HR and HRV values.
Q: Can this measure blood oxygen saturation (SpO2)?
A: No, this specific model uses a single-wavelength green LED optimized for Heart Rate and HRV detection. It does not support SpO2 measurement which requires red and infrared wavelengths.
Q: Is this sensor waterproof for sports use?
A: The sensor module itself has basic splash resistance, but it is not fully waterproof or submersible. It is designed primarily for indoor development and controlled testing environments.
Q: Does this module come with example code for Arduino?
A: Yes, we provide a GitHub repository link in the user manual containing sample libraries for Arduino, ESP32, and Raspberry Pi to help you get started quickly.
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