Mkr1010 wifinina I2C conflict with external EEPROM

Hardware MKR Family MKRWIFI1010
1

Hi,
I am trying to add an external EEPROM (generic AT24C256) to my MKR1010. I think that the wifinina uses the I2C SDA/SCK for the wifi functions. I want to use the sparkfun EEPROM library. How do I know what address to set the external EEPROM to so it doesn't conflict the I2C address with the wifinina?

Thanks for any advice!
Richard

2

The datasheet has all the information you need

001
0011259×693 91.9 KB

The address is dependent on how you tie A2, A1, and A0. If you connect all these pins to ground, you get

1010000X

Or

0xA0 for slave_write
0xA1 for slave_read

3

Run a I2C Scanner sketch to find the I2C address.

4

Thanks Koepel - I didn't know that there was such a tool. Looking at the sketch, I should have figured out that one myself :slight_smile:

5

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