TinyGo 3 — UART timed sensor loop

TinyGo elective 3 — UART timed sensor loop

Elective · ~3h
Goal: Fixed-period sampling loop with deadline-miss counter and CSV/status lines over serial; mock or real ADC.

Theory

Soft realtime logging needs:

1. Period T (e.g. 50 ms → 20 Hz)
   
2. Miss counter when work overruns
   
3. Bounded work per tick (no unbounded alloc/print spam)
   
4. UART as primary debug channel on MCUs

tick → read → filter (EMA) → print line → sleep until next deadline

Lab

1. Configure machine.Serial at 115200.
   
2. Loop with next += period; count misses when late.
   
3. Mock sensor from time; optional real machine.ADC.
   
4. EMA filter; print raw, ema, misses.
   
5. Host: picocom / screen on the serial device.

Full listing: monorepo Go project 43.

Checkpoint

• Stable serial stream
  
• Miss counter present
  
• Period chosen and justified

Next elective

TinyGo 4 — Cooperative tasks (95-tinygo-04-…).