How to use SDA1 and SLC1 on Arduino DUE?

Question

Arduino

Somehow earlier I noticed this problem but did not pay due attention, when connecting the device to I2c on the sda20 and slc21 contacts, the devices work fine, but when connected to sda1, slc1, the device does not work, the i2c multiscanner does not see it. The problem is presumably hardware, but I don’t have devices to check what it is, there are a lot of similar questions on the Internet, so it’s unlikely that this is a marriage, share your experience with anyone who has encountered this problem and what solution they found.

Answer 1

To use SDA1 and SLC1, you need to update the IDE to the latest version (in the arduino due library manager, also update it). in older version there is a bug and use wire instead, wire1.