Go - Outdoor Weather Bricklet¶

Callback¶

Download (example_callback.go)

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package main

import (
    "fmt"
    "github.com/Tinkerforge/go-api-bindings/ipconnection"
    "github.com/Tinkerforge/go-api-bindings/outdoor_weather_bricklet"
)

const ADDR string = "localhost:4223"
const UID string = "XYZ" // Change XYZ to the UID of your Outdoor Weather Bricklet.

func main() {
    ipcon := ipconnection.New()
    defer ipcon.Close()
    ow, _ := outdoor_weather_bricklet.New(UID, &ipcon) // Create device object.

    ipcon.Connect(ADDR) // Connect to brickd.
    defer ipcon.Disconnect()
    // Don't use device before ipcon is connected.

    // Enable station data callbacks
    ow.SetStationCallbackConfiguration(true)

    // Enable sensor data callbacks
    ow.SetSensorCallbackConfiguration(true)

    ow.RegisterStationDataCallback(func(identifier uint8, temperature int16, humidity uint8, windSpeed uint32, gustSpeed uint32, rain uint32, windDirection outdoor_weather_bricklet.WindDirection, batteryLow bool) {
        fmt.Printf("Identifier (Station): %d\n", identifier)
        fmt.Printf("Temperature (Station): %f °C\n", float64(temperature)/10.0)
        fmt.Printf("Humidity (Station): %d %%RH\n", humidity)
        fmt.Printf("Wind Speed (Station): %f m/s\n", float64(windSpeed)/10.0)
        fmt.Printf("Gust Speed (Station): %f m/s\n", float64(gustSpeed)/10.0)
        fmt.Printf("Rain (Station): %f mm\n", float64(rain)/10.0)

        if windDirection == outdoor_weather_bricklet.WindDirectionN {
            fmt.Println("Wind Direction (Station): N")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionNNE {
            fmt.Println("Wind Direction (Station): NNE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionNE {
            fmt.Println("Wind Direction (Station): NE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionENE {
            fmt.Println("Wind Direction (Station): ENE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionE {
            fmt.Println("Wind Direction (Station): E")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionESE {
            fmt.Println("Wind Direction (Station): ESE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionSE {
            fmt.Println("Wind Direction (Station): SE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionSSE {
            fmt.Println("Wind Direction (Station): SSE")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionS {
            fmt.Println("Wind Direction (Station): S")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionSSW {
            fmt.Println("Wind Direction (Station): SSW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionSW {
            fmt.Println("Wind Direction (Station): SW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionWSW {
            fmt.Println("Wind Direction (Station): WSW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionW {
            fmt.Println("Wind Direction (Station): W")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionWNW {
            fmt.Println("Wind Direction (Station): WNW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionNW {
            fmt.Println("Wind Direction (Station): NW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionNNW {
            fmt.Println("Wind Direction (Station): NNW")
        } else if windDirection == outdoor_weather_bricklet.WindDirectionError {
            fmt.Println("Wind Direction (Station): Error")
        }

        fmt.Printf("Battery Low (Station): %s\n", batteryLow)
        fmt.Println()
    })

    ow.RegisterSensorDataCallback(func(identifier uint8, temperature int16, humidity uint8) {
        fmt.Printf("Identifier (Sensor): %d\n", identifier)
        fmt.Printf("Temperature (Sensor): %f °C\n", float64(temperature)/10.0)
        fmt.Printf("Humidity (Sensor): %d %%RH\n", humidity)
        fmt.Println()
    })

    fmt.Print("Press enter to exit.")
    fmt.Scanln()
}

Basic Functions¶

func outdoor_weather_bricklet.New(uid string, ipcon *IPConnection) (device OutdoorWeatherBricklet, err error)¶

Parameters:	uid – Type: string ipcon – Type: *IPConnection
Returns:	device – Type: OutdoorWeatherBricklet err – Type: error

Creates a new OutdoorWeatherBricklet object with the unique device ID uid and adds it to the IPConnection ipcon:

device, err := outdoor_weather_bricklet.New("YOUR_DEVICE_UID", &ipcon)

This device object can be used after the IPConnection has been connected.

func (*OutdoorWeatherBricklet) GetStationIdentifiers() (identifiers []uint8, err error)¶

Returns:	identifiers – Type: []uint8, Length: variable, Range: [0 to 255] err – Type: error

Returns the identifiers (number between 0 and 255) of all stations that have been seen since the startup of the Bricklet.

Each station gives itself a random identifier on first startup.

Since firmware version 2.0.2 a station is removed from the list if no data was received for 12 hours.

func (*OutdoorWeatherBricklet) GetSensorIdentifiers() (identifiers []uint8, err error)¶

Returns:	identifiers – Type: []uint8, Length: variable, Range: [0 to 255] err – Type: error

Returns the identifiers (number between 0 and 255) of all sensors that have been seen since the startup of the Bricklet.

Each sensor gives itself a random identifier on first startup.

Since firmware version 2.0.2 a sensor is removed from the list if no data was received for 12 hours.

func (*OutdoorWeatherBricklet) GetStationData(identifier uint8) (temperature int16, humidity uint8, windSpeed uint32, gustSpeed uint32, rain uint32, windDirection uint8, batteryLow bool, lastChange uint16, err error)¶

Parameters:

identifier – Type: uint8, Range: [0 to 255]

Returns:

temperature – Type: int16, Unit: 1/10 °C, Range: [-400 to 650] humidity – Type: uint8, Unit: 1 %, Range: [10 to 99] windSpeed – Type: uint32, Unit: 1/10 m/s, Range: [0 to 232 - 1] gustSpeed – Type: uint32, Unit: 1/10 m/s, Range: [0 to 232 - 1] rain – Type: uint32, Unit: 1/10 mm, Range: [0 to 232 - 1] windDirection – Type: uint8, Range: See constants batteryLow – Type: bool lastChange – Type: uint16, Unit: 1 s, Range: [0 to 216 - 1] err – Type: error

Returns the last received data for a station with the given identifier. Call GetStationIdentifiers() for a list of all available identifiers.

The return values are:

• Temperature,
• Humidity,
• Wind Speed,
• Gust Speed,
• Rain Fall,
• Wind Direction,
• Battery Low (true if battery is low) and
• Last Change (seconds since the reception of this data).

The following constants are available for this function:

For windDirection:

• outdoor_weather_bricklet.WindDirectionN = 0
• outdoor_weather_bricklet.WindDirectionNNE = 1
• outdoor_weather_bricklet.WindDirectionNE = 2
• outdoor_weather_bricklet.WindDirectionENE = 3
• outdoor_weather_bricklet.WindDirectionE = 4
• outdoor_weather_bricklet.WindDirectionESE = 5
• outdoor_weather_bricklet.WindDirectionSE = 6
• outdoor_weather_bricklet.WindDirectionSSE = 7
• outdoor_weather_bricklet.WindDirectionS = 8
• outdoor_weather_bricklet.WindDirectionSSW = 9
• outdoor_weather_bricklet.WindDirectionSW = 10
• outdoor_weather_bricklet.WindDirectionWSW = 11
• outdoor_weather_bricklet.WindDirectionW = 12
• outdoor_weather_bricklet.WindDirectionWNW = 13
• outdoor_weather_bricklet.WindDirectionNW = 14
• outdoor_weather_bricklet.WindDirectionNNW = 15
• outdoor_weather_bricklet.WindDirectionError = 255

func (*OutdoorWeatherBricklet) GetSensorData(identifier uint8) (temperature int16, humidity uint8, lastChange uint16, err error)¶

Parameters:	identifier – Type: uint8, Range: [0 to 255]
Returns:	temperature – Type: int16, Unit: 1/10 °C, Range: [-215 to 215 - 1] humidity – Type: uint8, Unit: 1 %, Range: [0 to 255] lastChange – Type: uint16, Unit: 1 s, Range: [0 to 216 - 1] err – Type: error

Returns the last measured data for a sensor with the given identifier. Call GetSensorIdentifiers() for a list of all available identifiers.

The return values are:

• Temperature,
• Humidity and
• Last Change (seconds since the last reception of data).

Advanced Functions¶

func (*OutdoorWeatherBricklet) GetSPITFPErrorCount() (errorCountAckChecksum uint32, errorCountMessageChecksum uint32, errorCountFrame uint32, errorCountOverflow uint32, err error)¶

Returns:	errorCountAckChecksum – Type: uint32, Range: [0 to 232 - 1] errorCountMessageChecksum – Type: uint32, Range: [0 to 232 - 1] errorCountFrame – Type: uint32, Range: [0 to 232 - 1] errorCountOverflow – Type: uint32, Range: [0 to 232 - 1] err – Type: error

Returns the error count for the communication between Brick and Bricklet.

The errors are divided into

• ACK checksum errors,
• message checksum errors,
• framing errors and
• overflow errors.

The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.

func (*OutdoorWeatherBricklet) SetStatusLEDConfig(config uint8) (err error)¶

Parameters:	config – Type: uint8, Range: See constants, Default: 3
Returns:	err – Type: error

Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.

You can also turn the LED permanently on/off or show a heartbeat.

If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.

The following constants are available for this function:

For config:

• outdoor_weather_bricklet.StatusLEDConfigOff = 0
• outdoor_weather_bricklet.StatusLEDConfigOn = 1
• outdoor_weather_bricklet.StatusLEDConfigShowHeartbeat = 2
• outdoor_weather_bricklet.StatusLEDConfigShowStatus = 3

func (*OutdoorWeatherBricklet) GetStatusLEDConfig() (config uint8, err error)¶

Returns:	config – Type: uint8, Range: See constants, Default: 3 err – Type: error

Returns the configuration as set by SetStatusLEDConfig()

The following constants are available for this function:

For config:

• outdoor_weather_bricklet.StatusLEDConfigOff = 0
• outdoor_weather_bricklet.StatusLEDConfigOn = 1
• outdoor_weather_bricklet.StatusLEDConfigShowHeartbeat = 2
• outdoor_weather_bricklet.StatusLEDConfigShowStatus = 3

func (*OutdoorWeatherBricklet) GetChipTemperature() (temperature int16, err error)¶

Returns:	temperature – Type: int16, Unit: 1 °C, Range: [-215 to 215 - 1] err – Type: error

Returns the temperature as measured inside the microcontroller. The value returned is not the ambient temperature!

The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.

func (*OutdoorWeatherBricklet) Reset() (err error)¶

Returns:	err – Type: error

Calling this function will reset the Bricklet. All configurations will be lost.

After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!

func (*OutdoorWeatherBricklet) GetIdentity() (uid string, connectedUid string, position rune, hardwareVersion [3]uint8, firmwareVersion [3]uint8, deviceIdentifier uint16, err error)¶

Returns:

uid – Type: string, Length: up to 8 connectedUid – Type: string, Length: up to 8 position – Type: rune, Range: ['a' to 'h', 'i', 'z'] hardwareVersion – Type: [3]uint8 0: major – Type: uint8, Range: [0 to 255] 1: minor – Type: uint8, Range: [0 to 255] 2: revision – Type: uint8, Range: [0 to 255] firmwareVersion – Type: [3]uint8 0: major – Type: uint8, Range: [0 to 255] 1: minor – Type: uint8, Range: [0 to 255] 2: revision – Type: uint8, Range: [0 to 255] deviceIdentifier – Type: uint16, Range: [0 to 216 - 1] err – Type: error

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). The Raspberry Pi HAT (Zero) Brick is always at position 'i' and the Bricklet connected to an Isolator Bricklet is always as position 'z'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions¶

func (*OutdoorWeatherBricklet) SetStationCallbackConfiguration(enableCallback bool) (err error)¶

Parameters:	enableCallback – Type: bool, Default: false
Returns:	err – Type: error

Turns callback for station data on or off.

func (*OutdoorWeatherBricklet) GetStationCallbackConfiguration() (enableCallback bool, err error)¶

Returns:	enableCallback – Type: bool, Default: false err – Type: error

Returns the configuration as set by SetStationCallbackConfiguration().

func (*OutdoorWeatherBricklet) SetSensorCallbackConfiguration(enableCallback bool) (err error)¶

Parameters:	enableCallback – Type: bool, Default: false
Returns:	err – Type: error

Turns callback for sensor data on or off.

func (*OutdoorWeatherBricklet) GetSensorCallbackConfiguration() (enableCallback bool, err error)¶

Returns:	enableCallback – Type: bool, Default: false err – Type: error

Returns the configuration as set by SetSensorCallbackConfiguration().

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done with the corresponding Register*Callback function, which returns a unique callback ID. This ID can be used to deregister the callback later with the corresponding Deregister*Callback function.

func (*OutdoorWeatherBricklet) RegisterStationDataCallback(func(identifier uint8, temperature int16, humidity uint8, windSpeed uint32, gustSpeed uint32, rain uint32, windDirection uint8, batteryLow bool)) (registrationId uint64)¶

Callback Parameters:

identifier – Type: uint8, Range: [0 to 255] temperature – Type: int16, Unit: 1/10 °C, Range: [-400 to 650] humidity – Type: uint8, Unit: 1 %, Range: [10 to 99] windSpeed – Type: uint32, Unit: 1/10 m/s, Range: [0 to 232 - 1] gustSpeed – Type: uint32, Unit: 1/10 m/s, Range: [0 to 232 - 1] rain – Type: uint32, Unit: 1/10 mm, Range: [0 to 232 - 1] windDirection – Type: uint8, Range: See constants batteryLow – Type: bool

Returns:

registrationId – Type: uint64

Reports the station data every time a new data packet is received. See GetStationData() for information about the data.

For each station the callback will be triggered about every 45 seconds.

Turn the callback on/off with SetStationCallbackConfiguration() (by default it is turned off).

The following constants are available for this function:

For windDirection:

• outdoor_weather_bricklet.WindDirectionN = 0
• outdoor_weather_bricklet.WindDirectionNNE = 1
• outdoor_weather_bricklet.WindDirectionNE = 2
• outdoor_weather_bricklet.WindDirectionENE = 3
• outdoor_weather_bricklet.WindDirectionE = 4
• outdoor_weather_bricklet.WindDirectionESE = 5
• outdoor_weather_bricklet.WindDirectionSE = 6
• outdoor_weather_bricklet.WindDirectionSSE = 7
• outdoor_weather_bricklet.WindDirectionS = 8
• outdoor_weather_bricklet.WindDirectionSSW = 9
• outdoor_weather_bricklet.WindDirectionSW = 10
• outdoor_weather_bricklet.WindDirectionWSW = 11
• outdoor_weather_bricklet.WindDirectionW = 12
• outdoor_weather_bricklet.WindDirectionWNW = 13
• outdoor_weather_bricklet.WindDirectionNW = 14
• outdoor_weather_bricklet.WindDirectionNNW = 15
• outdoor_weather_bricklet.WindDirectionError = 255

func (*OutdoorWeatherBricklet) RegisterSensorDataCallback(func(identifier uint8, temperature int16, humidity uint8)) (registrationId uint64)¶

Callback Parameters:	identifier – Type: uint8, Range: [0 to 255] temperature – Type: int16, Unit: 1/10 °C, Range: [-215 to 215 - 1] humidity – Type: uint8, Unit: 1 %, Range: [0 to 255]
Returns:	registrationId – Type: uint64

Reports the sensor data every time a new data packet is received. See GetSensorData() for information about the data.

For each sensor the callback will be called about every 45 seconds.

Turn the callback on/off with SetSensorCallbackConfiguration() (by default it is turned off).

Virtual Functions¶

Virtual functions don't communicate with the device itself, but operate only on the API bindings device object. They can be called without the corresponding IP Connection object being connected.

func (*OutdoorWeatherBricklet) GetAPIVersion() (apiVersion [3]uint8, err error)¶

Returns:	apiVersion – Type: [3]uint8 0: major – Type: uint8, Range: [0 to 255] 1: minor – Type: uint8, Range: [0 to 255] 2: revision – Type: uint8, Range: [0 to 255] err – Type: error

Returns the version of the API definition implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

func (*OutdoorWeatherBricklet) GetResponseExpected(functionId uint8) (responseExpected bool, err error)¶

Parameters:	functionId – Type: uint8, Range: See constants
Returns:	responseExpected – Type: bool err – Type: error

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by SetResponseExpected(). For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• outdoor_weather_bricklet.FunctionSetStationCallbackConfiguration = 5
• outdoor_weather_bricklet.FunctionSetSensorCallbackConfiguration = 7
• outdoor_weather_bricklet.FunctionSetWriteFirmwarePointer = 237
• outdoor_weather_bricklet.FunctionSetStatusLEDConfig = 239
• outdoor_weather_bricklet.FunctionReset = 243
• outdoor_weather_bricklet.FunctionWriteUID = 248

func (*OutdoorWeatherBricklet) SetResponseExpected(functionId uint8, responseExpected bool) (err error)¶

Parameters:	functionId – Type: uint8, Range: See constants responseExpected – Type: bool
Returns:	err – Type: error

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For functionId:

• outdoor_weather_bricklet.FunctionSetStationCallbackConfiguration = 5
• outdoor_weather_bricklet.FunctionSetSensorCallbackConfiguration = 7
• outdoor_weather_bricklet.FunctionSetWriteFirmwarePointer = 237
• outdoor_weather_bricklet.FunctionSetStatusLEDConfig = 239
• outdoor_weather_bricklet.FunctionReset = 243
• outdoor_weather_bricklet.FunctionWriteUID = 248

func (*OutdoorWeatherBricklet) SetResponseExpectedAll(responseExpected bool) (err error)¶

Parameters:	responseExpected – Type: bool
Returns:	err – Type: error

Changes the response expected flag for all setter and callback configuration functions of this device at once.

Internal Functions¶

Internal functions are used for maintenance tasks such as flashing a new firmware of changing the UID of a Bricklet. These task should be performed using Brick Viewer instead of using the internal functions directly.

func (*OutdoorWeatherBricklet) SetBootloaderMode(mode uint8) (status uint8, err error)¶

Parameters:	mode – Type: uint8, Range: See constants
Returns:	status – Type: uint8, Range: See constants err – Type: error

Sets the bootloader mode and returns the status after the requested mode change was instigated.

You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

The following constants are available for this function:

For mode:

• outdoor_weather_bricklet.BootloaderModeBootloader = 0
• outdoor_weather_bricklet.BootloaderModeFirmware = 1
• outdoor_weather_bricklet.BootloaderModeBootloaderWaitForReboot = 2
• outdoor_weather_bricklet.BootloaderModeFirmwareWaitForReboot = 3
• outdoor_weather_bricklet.BootloaderModeFirmwareWaitForEraseAndReboot = 4

For status:

• outdoor_weather_bricklet.BootloaderStatusOK = 0
• outdoor_weather_bricklet.BootloaderStatusInvalidMode = 1
• outdoor_weather_bricklet.BootloaderStatusNoChange = 2
• outdoor_weather_bricklet.BootloaderStatusEntryFunctionNotPresent = 3
• outdoor_weather_bricklet.BootloaderStatusDeviceIdentifierIncorrect = 4
• outdoor_weather_bricklet.BootloaderStatusCRCMismatch = 5

func (*OutdoorWeatherBricklet) GetBootloaderMode() (mode uint8, err error)¶

Returns:	mode – Type: uint8, Range: See constants err – Type: error

Returns the current bootloader mode, see SetBootloaderMode().

The following constants are available for this function:

For mode:

• outdoor_weather_bricklet.BootloaderModeBootloader = 0
• outdoor_weather_bricklet.BootloaderModeFirmware = 1
• outdoor_weather_bricklet.BootloaderModeBootloaderWaitForReboot = 2
• outdoor_weather_bricklet.BootloaderModeFirmwareWaitForReboot = 3
• outdoor_weather_bricklet.BootloaderModeFirmwareWaitForEraseAndReboot = 4

func (*OutdoorWeatherBricklet) SetWriteFirmwarePointer(pointer uint32) (err error)¶

Parameters:	pointer – Type: uint32, Unit: 1 B, Range: [0 to 232 - 1]
Returns:	err – Type: error

Sets the firmware pointer for WriteFirmware(). The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256).

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

func (*OutdoorWeatherBricklet) WriteFirmware(data [64]uint8) (status uint8, err error)¶

Parameters:	data – Type: [64]uint8, Range: [0 to 255]
Returns:	status – Type: uint8, Range: [0 to 255] err – Type: error

Writes 64 Bytes of firmware at the position as written by SetWriteFirmwarePointer() before. The firmware is written to flash every 4 chunks.

You can only write firmware in bootloader mode.

This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.

func (*OutdoorWeatherBricklet) WriteUID(uid uint32) (err error)¶

Parameters:	uid – Type: uint32, Range: [0 to 232 - 1]
Returns:	err – Type: error

Writes a new UID into flash. If you want to set a new UID you have to decode the Base58 encoded UID string into an integer first.

We recommend that you use Brick Viewer to change the UID.

func (*OutdoorWeatherBricklet) ReadUID() (uid uint32, err error)¶

Returns:	uid – Type: uint32, Range: [0 to 232 - 1] err – Type: error

Returns the current UID as an integer. Encode as Base58 to get the usual string version.

Constants¶

outdoor_weather_bricklet.DeviceIdentifier¶

This constant is used to identify a Outdoor Weather Bricklet.

The GetIdentity() function and the (*IPConnection) RegisterEnumerateCallback callback of the IPConnection have a deviceIdentifier parameter to specify the Brick's or Bricklet's type.

outdoor_weather_bricklet.DeviceDisplayName¶

This constant represents the human readable name of a Outdoor Weather Bricklet.