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Original question:
cc2640 调用GATT_Indication()返回FAILURE
参照BloodPressure.c文件对自定义服务的character添加了indicate特性，如何处理ACK确认信息，以及indicate发送的逻辑是怎么样？character值改变自动调用发送?还是用去去判断character值变化了然后调用BloodPressure_MeasIndicate()函数去发数据。 有没有一个完整的demo可参考？
参考github上的BloodPressure示例：
https://github.com/ti-simplelink/ble_examples/tree/simplelink_cc2640r2_sdk-4.10/examples/rtos/CC2640R2_LAUNCHXL/bleapps/blood_pressure
