For the last several years we have been engaged in custom design work, mostly using ARM Cortex M4 such as Teensy 3.2 from PJRC. It is waaay better than the classic Arduino hardware and there is a great community, including many professional users who are working hard to make reliable, robust products. For example there is a superb I2C library for Teensy 3: i2c_t3. All the Arduino documentation should be as good as this. We use it and highly recommend it, along with a couple of minor mods we've added. |