Send a KeepAlive message.
This method sends a KeepAlive direct command to the device on the specified connection. Use RemoteConnectionIdle to determine when this write request is completed.
- Parameters:
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| _conn | The connection slot (0..4). Connections 0 through 3 are for bluetooth connections. Connection 4 refers to the RS485 hi-speed port. See Remote connection constants. |
| _result | A char value indicating whether the function call succeeded or not. |