Attributes

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

6 reviews

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.

5 FAQ

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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