PPG Wrist Pulse Sensor Module

Description

PPG Wrist Pulse Sensor Module The PPG Wrist Pulse Sensor Module is a compact photoplethysmography (PPG) sensor designed for wrist, arm, or finger pulse measurement, delivering a continuous analog pulse waveform and a selectable square-wave heart-rate output compatible with common microcontroller platforms. The module operates from a 5V supply, consumes under 10mA in typical use, and exposes an XH2.54-4P interface for direct connection to Arduino and STM32 development boards, enabling straightforward integration into wearable and prototype projects. Features Uses green-light PPG (PhotoPlethysmoGraphy) for stable pulse signal acquisition. Dual output modes: continuous analog pulse waveform and digital square-wave pulse output. Compatible with 5V systems and communicates via an XH2.54-4P connector for easy hookup. Low current consumption (<10mA) for battery-powered and wearable applications. Library and example code available (Arduino library “CheezPPG”) with 125Hz sampling and serial output for raw, filtered, peak, HR, and HRV data. Notes: This is a static detection sensor. Do not move it randomly or press it too tightly during measurement. This product is not a professional medical device and cannot be used as an auxiliary accessory for diagnosis and treatment. PINOUT Specifications Parameter Value Supply Voltage 5VDC Operating Current <10mA Analog Output 0-3.3V Digital Output 0/3.3V Module Interface XH2.54-4P Dimensions 26mm x 26.4mm Applications Wrist or finger heart-rate monitoring for wearable prototypes and hobby projects. Real-time HR and HRV data collection for biofeedback and fitness experiments. Integration into health-adjacent prototypes, research demos, and interactive installations. Teaching and learning tool for embedded signal processing and PPG fundamentals. Package Contents 1x PPG Wrist Pulse Sensor Module. 1x XH2.54-4P to 4-pin Dupont 30cm cable (for Arduino/MCU connection). 1x Wrist Strap. Arduino Tutorial Software Requirements: Arduino IDE >=2.3 Library files Sample Code: /* Serial output: The baud rate is 115200 Sampling rate: 125Hz Serial output content (ASCII): Raw data, smooth filter data, band pass filter data, heartbeat detection data, heart rate data, HRV (SDNN) data */ #include "CheezPPG.h" #define INPUT_PIN A0 // PPG Pin #define SAMPLE_RATE 125 CheezPPG ppg(INPUT_PIN, SAMPLE_RATE); void setup() { Serial.begin(115200); ppg.setWearThreshold(80); // Set the wearing threshold. If wearing detection is not required, it can be set to -1 } void loop() { if (ppg.checkSampleInterval()) { ppg.ppgProcess(); Serial.println( String((int)ppg.getRawPPG()) + "," + // Raw data String((int)ppg.getAvgPPG()) + "," + // Smooth filter data String((int)ppg.getFilterPPG()) + "," + // Bandpass filtered data String((int)ppg.getPpgPeak()) + "," + // Heartbeat detection data String((int)ppg.getPpgHr()) + "," + // Heart rate data String((int)ppg.getPpgHrv()) // HRV(SDNN) data ); } } You can view the experimental results through the “Serial Port Plotter” on the Arduino IDE

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