# `NestGen2.Backlight`
[🔗](https://github.com/integration-technology/nest_gen2_sdk/blob/v0.6.6/lib/nest_gen2/backlight.ex#L1)

The LM3530 backlight.

`set/1` sets the level used while the screen is awake (0..120; the stock UI
uses 113). `NestGen2.Power` switches it off while asleep. The SDK re-writes the
current value every second, because the panel goes dark about a minute after
the last write.

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `level`

```elixir
@spec level() :: 0..120
```

# `set`

```elixir
@spec set(0..120) :: :ok
```

Level used while the screen is awake, 0..120.

# `set_fade`

```elixir
@spec set_fade(pos_integer(), pos_integer()) :: :ok
```

Hardware fade times. Each is rounded to the nearest the chip supports:
1, 130, 260, 520, 1000, 2000, 4000 or 8000 ms. Stock: 260 up, 2000 down.

# `start_link`

---

*Consult [api-reference.md](api-reference.md) for complete listing*