BLE TI SensorTag CC2650 - Printable Version

Code:
return {

  manufacturer = 'TI',

  description = 'SensorTag',

  default_name = 'SensorTag',

  version = 2,

  objects = {

    {

      id = 'temp',

      name = 'Temperature',

      datatype = dt.temperature

    },

    {

      id = 'hum',

      name = 'Humidity',

      datatype = dt.scale

    },

    {

      id = 'button1',

      name = 'Button 1',

      datatype = dt.switch

    },

    {

      id = 'button2',

      name = 'Button 2',

      datatype = dt.switch

    }

  },

  init = function(device)

    local objects = device.objects



    if not objects.button1 and not objects.button2 then

      device.profile.step = nil

    end



    if not objects.temp and not objects.hum then

      device.profile.read = nil

    end

  end,

  setbutton = function(device, button, value)

    local key = 'button' .. button



    if device[ key ] ~= value then

      device.writeobject(key, value)

      device[ key ] = value

    end

  end,

  step = function(device)

    local sock, res, data, err, setbutton



    sock = device.sock

    setbutton = device.profile.setbutton



    if not sock then

      sock = ble.sock()

      ble.settimeout(sock, 1)



      -- try connecting

      res = ble.connect(sock, device.mac)

      if not res then

        ble.close(sock)

        device.setactive(false)

        os.sleep(5)

        return

      end



      -- enable button notification

      ble.sockwritecmd(sock, 0x60, 1, 0)

      device.sock = sock



      setbutton(device, 1, false)

      setbutton(device, 2, false)

    end



    res, data = ble.sockreadnotify(sock, 1)

    -- read ok

    if res then

      data = data:byte(1)



      setbutton(device, 1, bit.band(data, 1) == 1)

      setbutton(device, 2, bit.band(data, 2) == 2)



      device.setactive(true)

    -- timeout or disconnect

    else

      res, err = ble.check(sock)



      -- disconnect

      if not res or err ~= 0 then

        ble.close(sock)

        device.sock = nil

      end

    end

  end,

  read = function(device)

    local sock, res, status, values, rssi



    if device.profile.step then

      sock = device.sock

      res = sock

    else

      sock = ble.sock()

      ble.settimeout(sock, 1)

      res = ble.connect(sock, device.mac)

    end



    -- connect ok, enable sensor, wait for conversion to finish, read the result

    if res then

      ble.sockwritecmd(sock, 0x3C, 1)

      os.sleep(0.1)

      res = ble.sockreadhnd(sock, 0x38)



      -- read ok

      if res then

        status = true

        values = {}



        rssi = ble.getrssi(device.mac)



        -- convert temperature

        tmp = bit.bor(bit.lshift(res:byte(2), 8), res:byte(1))

        tmp = -46.85 + 175.72 / 65536 * tmp;

        values.temp = math.floor(tmp * 10) / 10



        -- convert humidity

        tmp = bit.bor(bit.lshift(res:byte(4), 8), res:byte(3))

        tmp = -6.0 + 125.0 / 65536 * bit.band(tmp, 0xFFFC)

        values.hum = math.floor(tmp + 0.5)

      end



      -- disable sensor

      ble.sockwritecmd(sock, 0x3C, 0)

    end



    if not device.profile.step then

      ble.close(sock)

    end



    return status, values, rssi

  end

}