> For the complete documentation index, see [llms.txt](https://trillbit.gitbook.io/trillbit-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trillbit.gitbook.io/trillbit-sdk/ios-support/trill-sdk-for-ios/methods-and-callbacks/trill-sdk-methods.md).

# Trill SDK Methods

```
(bool) start_sender: (NSString*) payload: (int) algo: (int) repeat_count: (float) gap;
```

Start the sending process on the application. The method returns true if sending is started successfully. In case of error check callback onError

**payload**: String to send

**algo**: Algorithm for sending payload ( Algorithm could be TRILL\_ALGO\_NEAR,

TRILL\_ALGO\_MID, TRILL\_ALGO\_FAR

**repeat\_count**: no of times the payload is to be sent.

**repeat\_gap**: Gap between two plays in seconds ( range between 0.2 - 1 ).

```
(bool) stop_sender;
```

Stop the sending process on the application. The method returns true if

sending is successfully stopped. In case of error check callback onError

```
(bool) start_receiver;
```

Start receiving trill tones on the application. The method returns true if the

receiver is successfully started. In case of error check callback onError

```
(bool) stop_receiver;
```

Stop receiving trill tones. The method returns true if the receiver is

successfully stopped. In case of error check callback onError

Sample Code for Sending data:

```
// Start sending data with playing algo as Algo Far, repeat count as 3 and gaps between two play as 0.2
seconds
trill?.start_sender(“abcdef”, TRILL_ALGO_FAR, 3, 0.2);
// Stop Sending Data
trill?.stop_sender();.
```

Sample Code for Receiving data:

```
// Start receiving data
trill?.start_receiver();
// Send SSID and Password with algo OFSR and repeat counter 50
trill?.stop_receiver();
```