Oh yeah, and WiFi and BLE. We’ve come a long way in a very short time. The C3 is really a blend of the two: a limited number of GPIO pins like the ESP8266, but with nice peripherals like the ESP32.

Some people state that ESP8266 is tolerant of 5 V logic levels on its GPIOs, while others vehemently disagree, pointing at the datasheet-stated 3.6 V maximum. Datasheets aren’t source code fo… ...