Optiboot (an older version) is installed by default on the Arduino Uno and (as of 2018) official Arduino Nano boards. It can be installed on all older mega8, 168 or 328 based Arduinos. As of 2019, ...
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This is an arduino IDE library to control the LSM6DS3. It can be configured to use I2C or SPI with 2 instances per I2C channel or any number of SPI instances. The top-level driver, class LSM6DS3, ...