This is the description of the Delphi/Lazarus API bindings for the Outdoor Weather Bricklet. General information and technical specifications for the Outdoor Weather Bricklet are summarized in its hardware description.
An installation guide for the Delphi/Lazarus API bindings is part of their general description.
The example code below is Public Domain (CC0 1.0).
Download (ExampleCallback.pas)
1program ExampleCallback;
2
3{$ifdef MSWINDOWS}{$apptype CONSOLE}{$endif}
4{$ifdef FPC}{$mode OBJFPC}{$H+}{$endif}
5
6uses
7 SysUtils, IPConnection, BrickletOutdoorWeather;
8
9type
10 TExample = class
11 private
12 ipcon: TIPConnection;
13 ow: TBrickletOutdoorWeather;
14 public
15 procedure StationDataCB(sender: TBrickletOutdoorWeather; const identifier: byte;
16 const temperature: smallint; const humidity: byte;
17 const windSpeed: longword; const gustSpeed: longword;
18 const rain: longword; const windDirection: byte;
19 const batteryLow: boolean);
20 procedure SensorDataCB(sender: TBrickletOutdoorWeather; const identifier: byte;
21 const temperature: smallint; const humidity: byte);
22 procedure Execute;
23 end;
24
25const
26 HOST = 'localhost';
27 PORT = 4223;
28 UID = 'XYZ'; { Change XYZ to the UID of your Outdoor Weather Bricklet }
29
30var
31 e: TExample;
32
33{ Callback procedure for station data callback }
34procedure TExample.StationDataCB(sender: TBrickletOutdoorWeather; const identifier: byte;
35 const temperature: smallint; const humidity: byte;
36 const windSpeed: longword; const gustSpeed: longword;
37 const rain: longword; const windDirection: byte;
38 const batteryLow: boolean);
39begin
40 WriteLn(Format('Identifier (Station): %d', [identifier]));
41 WriteLn(Format('Temperature (Station): %f °C', [temperature/10.0]));
42 WriteLn(Format('Humidity (Station): %d %%RH', [humidity]));
43 WriteLn(Format('Wind Speed (Station): %f m/s', [windSpeed/10.0]));
44 WriteLn(Format('Gust Speed (Station): %f m/s', [gustSpeed/10.0]));
45 WriteLn(Format('Rain (Station): %f mm', [rain/10.0]));
46
47 if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_N) then begin
48 WriteLn('Wind Direction (Station): N');
49 end
50 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNE) then begin
51 WriteLn('Wind Direction (Station): NNE');
52 end
53 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NE) then begin
54 WriteLn('Wind Direction (Station): NE');
55 end
56 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ENE) then begin
57 WriteLn('Wind Direction (Station): ENE');
58 end
59 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_E) then begin
60 WriteLn('Wind Direction (Station): E');
61 end
62 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ESE) then begin
63 WriteLn('Wind Direction (Station): ESE');
64 end
65 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SE) then begin
66 WriteLn('Wind Direction (Station): SE');
67 end
68 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSE) then begin
69 WriteLn('Wind Direction (Station): SSE');
70 end
71 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_S) then begin
72 WriteLn('Wind Direction (Station): S');
73 end
74 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSW) then begin
75 WriteLn('Wind Direction (Station): SSW');
76 end
77 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SW) then begin
78 WriteLn('Wind Direction (Station): SW');
79 end
80 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WSW) then begin
81 WriteLn('Wind Direction (Station): WSW');
82 end
83 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_W) then begin
84 WriteLn('Wind Direction (Station): W');
85 end
86 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WNW) then begin
87 WriteLn('Wind Direction (Station): WNW');
88 end
89 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NW) then begin
90 WriteLn('Wind Direction (Station): NW');
91 end
92 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNW) then begin
93 WriteLn('Wind Direction (Station): NNW');
94 end
95 else if (windDirection = BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ERROR) then begin
96 WriteLn('Wind Direction (Station): Error');
97 end;
98
99 WriteLn(Format('Battery Low (Station): %d', [batteryLow]));
100 WriteLn('');
101end;
102
103{ Callback procedure for sensor data callback }
104procedure TExample.SensorDataCB(sender: TBrickletOutdoorWeather; const identifier: byte;
105 const temperature: smallint; const humidity: byte);
106begin
107 WriteLn(Format('Identifier (Sensor): %d', [identifier]));
108 WriteLn(Format('Temperature (Sensor): %f °C', [temperature/10.0]));
109 WriteLn(Format('Humidity (Sensor): %d %%RH', [humidity]));
110 WriteLn('');
111end;
112
113procedure TExample.Execute;
114begin
115 { Create IP connection }
116 ipcon := TIPConnection.Create;
117
118 { Create device object }
119 ow := TBrickletOutdoorWeather.Create(UID, ipcon);
120
121 { Connect to brickd }
122 ipcon.Connect(HOST, PORT);
123 { Don't use device before ipcon is connected }
124
125 { Enable station data callbacks }
126 ow.SetStationCallbackConfiguration(true);
127
128 { Enable sensor data callbacks }
129 ow.SetSensorCallbackConfiguration(true);
130
131 { Register station data callback to procedure StationDataCB }
132 ow.OnStationData := {$ifdef FPC}@{$endif}StationDataCB;
133
134 { Register sensor data callback to procedure SensorDataCB }
135 ow.OnSensorData := {$ifdef FPC}@{$endif}SensorDataCB;
136
137 WriteLn('Press key to exit');
138 ReadLn;
139 ipcon.Destroy; { Calls ipcon.Disconnect internally }
140end;
141
142begin
143 e := TExample.Create;
144 e.Execute;
145 e.Destroy;
146end.
Since Delphi does not support multiple return values directly, we use the
out keyword to return multiple values from a function.
All functions and procedures listed below are thread-safe.
| Parameters: |
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|---|---|
| Returns: |
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Creates an object with the unique device ID uid:
outdoorWeather := TBrickletOutdoorWeather.Create('YOUR_DEVICE_UID', ipcon);
This object can then be used after the IP Connection is connected.
| Returns: |
|
|---|
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.
| Returns: |
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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.
| Parameters: |
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|---|---|
| Output Parameters: |
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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 (accumulated since station power-up),
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:
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_N = 0
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNE = 1
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NE = 2
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ENE = 3
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_E = 4
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ESE = 5
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SE = 6
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSE = 7
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_S = 8
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSW = 9
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SW = 10
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WSW = 11
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_W = 12
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WNW = 13
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NW = 14
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNW = 15
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ERROR = 255
| Parameters: |
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|---|---|
| Output Parameters: |
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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).
| Output Parameters: |
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|---|
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.
| Parameters: |
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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:
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_OFF = 0
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_ON = 1
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_SHOW_STATUS = 3
| Returns: |
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Returns the configuration as set by SetStatusLEDConfig
The following constants are available for this function:
For config:
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_OFF = 0
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_ON = 1
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_SHOW_HEARTBEAT = 2
BRICKLET_OUTDOOR_WEATHER_STATUS_LED_CONFIG_SHOW_STATUS = 3
| Returns: |
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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.
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!
| Output Parameters: |
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|---|
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). A Bricklet connected to an Isolator Bricklet is always at position 'z'.
The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.
| Parameters: |
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Turns callback for station data on or off.
| Returns: |
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Returns the configuration as set by SetStationCallbackConfiguration.
| Parameters: |
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Turns callback for sensor data on or off.
| Returns: |
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Returns the configuration as set by SetSensorCallbackConfiguration.
Callbacks can be registered to receive time critical or recurring data from the device. The registration is done by assigning a procedure to an callback property of the device object:
procedure TExample.MyCallback(sender: TBrickletOutdoorWeather; const value: longint); begin WriteLn(Format('Value: %d', [value])); end; outdoorWeather.OnExample := {$ifdef FPC}@{$endif}example.MyCallback;
The available callback properties and their parameter types are described below.
Note
Using callbacks for recurring events is always preferred compared to using getters. It will use less USB bandwidth and the latency will be a lot better, since there is no round trip time.
procedure(sender: TBrickletOutdoorWeather; const identifier: byte; const temperature: smallint; const humidity: byte; const windSpeed: longword; const gustSpeed: longword; const rain: longword; const windDirection: byte; const batteryLow: boolean) of object;
| Callback Parameters: |
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|---|
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:
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_N = 0
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNE = 1
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NE = 2
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ENE = 3
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_E = 4
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ESE = 5
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SE = 6
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSE = 7
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_S = 8
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SSW = 9
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_SW = 10
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WSW = 11
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_W = 12
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_WNW = 13
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NW = 14
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_NNW = 15
BRICKLET_OUTDOOR_WEATHER_WIND_DIRECTION_ERROR = 255
procedure(sender: TBrickletOutdoorWeather; const identifier: byte; const temperature: smallint; const humidity: byte) of object;
| Callback Parameters: |
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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 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.
| Output Parameters: |
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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.
| Parameters: |
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| Returns: |
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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:
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_STATION_CALLBACK_CONFIGURATION = 5
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_SENSOR_CALLBACK_CONFIGURATION = 7
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_STATUS_LED_CONFIG = 239
BRICKLET_OUTDOOR_WEATHER_FUNCTION_RESET = 243
BRICKLET_OUTDOOR_WEATHER_FUNCTION_WRITE_UID = 248
| Parameters: |
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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:
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_STATION_CALLBACK_CONFIGURATION = 5
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_SENSOR_CALLBACK_CONFIGURATION = 7
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_WRITE_FIRMWARE_POINTER = 237
BRICKLET_OUTDOOR_WEATHER_FUNCTION_SET_STATUS_LED_CONFIG = 239
BRICKLET_OUTDOOR_WEATHER_FUNCTION_RESET = 243
BRICKLET_OUTDOOR_WEATHER_FUNCTION_WRITE_UID = 248
| Parameters: |
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Changes the response expected flag for all setter and callback configuration functions of this device at once.
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.
| Parameters: |
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| Returns: |
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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:
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_BOOTLOADER = 0
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE = 1
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
For status:
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_OK = 0
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_INVALID_MODE = 1
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_NO_CHANGE = 2
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT = 3
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT = 4
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_STATUS_CRC_MISMATCH = 5
| Returns: |
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Returns the current bootloader mode, see SetBootloaderMode.
The following constants are available for this function:
For mode:
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_BOOTLOADER = 0
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE = 1
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT = 2
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT = 3
BRICKLET_OUTDOOR_WEATHER_BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT = 4
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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.
| Parameters: |
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| Returns: |
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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.
| Parameters: |
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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.
| Returns: |
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Returns the current UID as an integer. Encode as Base58 to get the usual string version.
This constant is used to identify a Outdoor Weather Bricklet.
The GetIdentity function and the
TIPConnection.OnEnumerate
callback of the IP Connection have a deviceIdentifier parameter to specify
the Brick's or Bricklet's type.
This constant represents the human readable name of a Outdoor Weather Bricklet.