Review week 6: batch and NaN

This week was about many devices at once and about what happens when one of them is missing. The quiz checks:

• Batch modes: Average for readings, Sum for real sums, Minimum, Maximum, Count – and what each returns without a match.
• lb and sb: all devices of a type, without names. Good for lights, dangerous for air.
• NaN guards: snan, snanz, bnan, select – and the safe direction per device.
• Data network: all cables carry data, devices do not join networks, behind the transformer is a different network.
• Several rooms: same name for sensor and heater, room name in a register, one room per tick.

You pass from 60 %.