The ESP8266 modules are so cheap who could resist experimenting with one. For about $8USD a few things you get are 9 GPIOs, I2C/SPI support, an ADC, and on board WiFi or other goodies. In addition ...
This library would not be possible without the work of the USB Host Shield Library developers. Thank you is necessary! The example programs should work on Zero, M0, and MKR family on the native USB ...