void loop() // Request register 0x00 (Part ID) Wire.requestFrom(MAX30100_ADDR, 1); if (Wire.available()) byte partID = Wire.read(); Serial.print("Part ID: "); Serial.println(partID, HEX); // Should return 0x11
Some outdated libraries use the wrong I2C address. The MAX30100 real address is 0x57 (or 0x55 depending on ADDR pin). But some Proteus models use 0xAE . If your simulation connects but reads zeros, you need an updated MAX30100.HEX where the developer hardcoded the correct address. Download a fresh copy from the GitHub repository "max30100_proteus_fixed". max30100 proteus library download fix
#include <Wire.h>
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