*/
private String[] getSymbols() throws HomematicClientException {
DatapointConfig dpConfig = new DatapointConfig(remoteControlAddress, "18", "SUBMIT");
HmDatapoint rcDatapoint = (HmDatapoint) context.getStateHolder().getState(dpConfig);
if (rcDatapoint == null) {
throw new HomematicClientException("Address " + remoteControlAddress
+ " is not a Homematic remote control with a display");
}
List<String> symbols = new ArrayList<String>();
for (HmDatapoint datapoint : rcDatapoint.getChannel().getDatapoints()) {