Arduino/Wiring-compatible

• delay Waste some time (and allow packet handlers to be called).

• delayMicroseconds Waste time (with interrupts disabled and nothing happening)
• digitalRead Read the state of a digital pin
• digitalWrite Write the state of a digital output pin
• pinMode Set a digital pin's 'mode' to INPUT or OUTPUT (or "REFLEX_MODE").
• millis
• micros
• randomSeed(u32 seed)
• random(u32 max)
• random(int min, int max)