I2C slave device address diff bw data sheet and nRF52

[djqtsg]

I am using Martin's code to test my I2C connection.

I use PC10040 evaluation board, SCL and SDA are 3 and 4.

My sensor is a Max 30102 pulse and HR sensor. I used Martin's code to detect my device at address 0x57; however, address in its datasheet is 0xAE/write 0xAF/read.

What I am missing?

[Alex]

It is the same address. Nordic's code doesn't use LSB. 0xAF/2=0x57. So shifted by one bit.