What if I want to use a library, but with a different I2C port? You have to go into the library and modify quite a bit to get it to work. But as I attached things like the HMC5883L to the SAMD21, I quickly realized that most libraries assume you will be using Wire.write(). It’s an amazing board because it’s got multiple serial ports and multiple I2C ports. My AVC 2016 vehicle used a handful of our SAMD21 Minis.
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