error = service:discoverCharacteristics([UUIDs, ] callback [, object])
Initiates the characteristics discovery procedure for the service object. The callback will be called once on completion of the procedure. The discovery may complete successfully or fail.
|
Parameter |
Type |
Description |
|---|---|---|
|
UUID(s) |
in strings(s) |
0 to 10 UUIDs, identifying
characteristics to search for. |
|
callback |
in function |
Callback to inform about the completion of the characteristics discovery procedure. A call to getCharacteristics() of the service object provides the results. |
|
object |
in any (optional) |
If an object is provided it will be passed as the first parameter to the specified callback function. The object can be of any type except nil |
|
error |
out string (optional) |
If successful nil is returned, an error message otherwise |
Introduced in platform.apiLevel = '2.5'
callback([object,] service [, error])
The callback function provided in discoverCharacteristics will be called once when the characteristics discovery procedure completes. Based on whether an object was provided in the call to discoverCharacteristics, the callback should have two or three parameters. The error will be nil if the procedure completed successfully. Calling getCharacteristics will retrieve the discovered characteristics..
|
Parameter |
Type |
Description |
|---|---|---|
|
object |
in any (optional) |
If an object was provided as a parameter to the function discoverCharacteristics, it will be passed as the first parameter to this callback function |
|
service |
in service object |
The service object offering the discovered characteristics |
|
error |
in string (optional) ) |
If successful the parameter will be nil, an error message otherwise |
Introduced in platform.apiLevel = '2.5'