AT24C512_Demo.ino doesn't work.

[MynaBay]

I'm using a RedBear BLE Nano v1.5 to build a simple device. I need to save about 50 bytes of data into the EEPROM. I started by running the AT24C512_Demo.ino project but it doesn't work. Doesn't read anything back.

(Output from project)

Wire demo start
Read data from AT24C512:
����������
Read data from AT24C512:
����������
Read data from AT24C512:
����������
Read data from AT24C512:
����������
Read data from AT24C512:

A little debugging and I found that the call to Wire.available() in AT24C512_ReadBytes always returns 0. Spent some time Googling & trying things. Couldn't get it to work.

Is this a HW limitation of the BLE Nano?

Building with a Mac (10.13.2) and Arduino IDE (1.8.2). Other BLE projects/examples are working. My device is working too. I just can't save my data across power cycles.