Onboard sensors

Overview

The accelerometer, gyroscope, magnetometer and proximity sensor run on the phone's sensor DSP. ExQcomSmgr keeps the latest reading of each.

Read every sensor once

ExQcomSmgr.read_all()

Units: accelerometer in m/s², gyroscope in rad/s, magnetometer in gauss. {:error, :no_data} means that sensor hasn't reported yet.

One sensor

ExQcomSmgr.read(:accel)

Live view

Tilt the phone while this runs for ten seconds.

frame = Kino.Frame.new() |> Kino.render()

# 50 rounds; each reads the accelerometer, then waits 0.2 seconds.
for _round <- 1..50 do
  text =
    case ExQcomSmgr.read(:accel) do
      {:ok, %{x: x, y: y, z: z}} ->
        "x: #{Float.round(x, 2)}   y: #{Float.round(y, 2)}   z: #{Float.round(z, 2)}  m/s²"

      other ->
        inspect(other)
    end

  Kino.Frame.render(frame, Kino.Markdown.new("`#{text}`"))
  Process.sleep(200)
end

:done

Proximity

Cover the top of the phone with your hand and read again.

ExQcomSmgr.read(:prox)