Despite the differences in size and microcontroller, the Arduino Nano and Micro share some similar pinout configurations ... You'll notice a difference between the SPI and I2C/TWI pins, as ...

The ESP’s extremely flexible hardware peripheral routing matrix allows it to assign the SPI functions to any pins, but the Arduino implementation is preset to a default pinout, so you just need ...

The original device now gets incorrect data. For the last several weeks, [Paul] has been working on a new Arduino SPI library, to solve these types of conflicts. In the above scenario ...