PlatformIO Arduino Blink

Blink Example For Arduino which builds using PlatformIO and runs on a variety of boards.

Tested boards:

• Adafruit adafruit_itsybitsy_m4
• Adafruit trinket_m0
• Arduino leonardo
• Arduino micro
• Arduino nano_33_iot
• Arduino uno
• Arduino yun
• Attiny84
• Digispark ATTINY85 digispark-tiny
• ESP32 esp32thing
• ESP32 lolin32
• ESP8266 d1_mini
• PJRC teensylc
• PJRC teensy31
• PJRC teensy36
• PJRC teensy40
• PJRC teensy41
• Sipeed sipeed-longan-nano
• ST disco_f746ng

I keep this around as a sanity check for basic testing of boards.