The SDA1 and SCL1 pins are found in the EAGLE files for the Arduino Nano 33 BLE:Īs an example, I made a custom PCB with the Nina B306 and an LSM6DS3. It looks like everything defaults to the AIN0_A5/SCL (GPIO18 / P0.02) and AIN7_A4/SDA (GPIO 20 / P0.31) pins.
I'm trying to use the I2C bus using the SDA1 (GPIO 2 / P0.14) and SCL1 (GPIO 3 / P0.15) pins, but I haven't yet figured out how to 'activate' these pins for I2C usage.