demo.jsonl

{"leds":10}
{"t":     0,"buf":"000000000000000000000000000000000000000000000000000000000000"}
{"t":    50,"buf":"000000000000000000000000000000000000000000000000000000000000"}
{"t":   100,"buf":"000000000000000000000000000000000000000000000000000000000000"}