You can refer to SampleApp in \ZStack-CC2530-2.5.1a\Projects\zstack\Samples\SampleApp\. Check the HAL_KEY_SW_1 case in SampleApp_HandleKeys(). When HAL_KEY_SW_1 is triggered, it will call SampleApp_SendFlashMessage() and SampleApp_SendFlashMessage send out message using AF_DataRequest().
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