The MAX30102 is an integrated biosensor module designed for pulse oximetry and heart rate monitoring. It incorporates a red LED, an infrared LED, a photodetector, optical components, and low-noise electronics with ambient light suppression.

Additionally, the module supports a software shutdown mode, with standby current approaching zero, ensuring continuous power supply readiness.

The MAX30102 features a glass cover design that effectively eliminates external and internal optical interference, delivering enhanced reliability.

Basic Information of  the MAX30102

• PCB Size: 30mm × 24mm (Length × Width)
• Mounting Hole Spacing: 23mm × 16mm (Length × Width)
• Power Supply: 5V
• Control Method: AT Commands
• Main Components: Sensor, Microcontroller, Power Supply
• Heart Rate Measurement Range: 20–200 beats per minute
• Blood Oxygen Measurement Range: 50%–100%

Output Modes of  the MAX30102

1. Serial Output (can connect via USB to TTL converter for direct data reading through the computer serial port).
2. Alert Signal Output: 0V or 3.3V
   • Alert LED on: Outputs 3.3V
   • Alert LED off: Outputs 0V

Function Description 

1. Blood Oxygen Alert LED
2. Blood Oxygen Alert Signal Output (0V or 3.3V)
3. Power LED
4. Heart Rate Alert Signal Output (0V or 3.3V)
5. Heart Rate Alert LED
6. Blood Oxygen and Heart Rate Sensor (Needs to be touched for measurement)
7. 5V Power Supply
8. Serial Output (GND, RX, TX)

Connection Instructions of  the MAX30102

• TXD: Transmit data pin, typically represents the device’s transmitting end. For proper communication, TXD must be connected to the RXD of another device.
• RXD: Receive data pin, typically represents the device’s receiving end. For proper communication, RXD must be connected to the TXD of another device.

Note: During normal communication, the TXD of this device always connects to the RXD of the remote device.