I bought this one and I followed up tutorial but it’s not work . the wire.request never sent back any values.

so, i try to check addr with scanner then i found that it’s 0x50 instead of 0xA0 (from code tutorial). So, i try wire.request again with new addr that i just found. the result was the same it never sent back any values.
All of these, i could say my wiring are ok (because esp32 found addr of grove) and also grove no any short circuit(using multimeter). So how can i fix this ?

this ref for tutorial : https://wiki.seeedstudio.com/Grove-Finger-clip_Heart_Rate_Sensor/

my code:

#include <Wire.h>
void setup() {
    Serial.begin(115200);
    Serial.println("heart rate sensor:");
    Wire.begin (21, 22); 
}
void loop() {
    Wire.requestFrom(0x50 >> 1, 1);    // request 1 bytes from slave device
    while(Wire.available()) {          // slave may send less than requested
        unsigned char c = Wire.read();   // receive heart rate value (a byte)
        Serial.println(c, DEC);         // print heart rate value
    }
    delay(500);
}