关于通过UUID去获取handle

协议栈里的例程都是通过SIMPLEPROFILE_CHAR1_UUID去获得handle

req.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR1_UUID);

req.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR1_UUID);

为什么通过SIMPLEPROFILE_CHAR4_UUID去获取handle会失败，我的从机SIMPLEPROFILE_CHAR4_UUID是Notify，还请大神告知.

chao xie：

通过SIMPLEPROFILE_CHAR2_UUID也是可以获得handle的，是不是notify对应的UUID要特殊处理才能获取handle？

chao xie：

回复 chao xie:

目前测试下来通过，CHAR3，CHAR4，CHAR5，均无法获取handle，是不是从机那边需要进行设置？

Barbara Wu：

回复 chao xie:

有点不明白您的意思，您这边是主机？获取handle的代码是？

chao xie：

回复 Barbara Wu:

就是Ti的主机例子啊，

static void SimpleBLECentral_processGATTDiscEvent(gattMsgEvent_t *pMsg){ if (pMsg->method == ATT_MTU_UPDATED_EVENT) { // MTU size updated LCD_WRITE_STRING_VALUE("MTU Size:", pMsg->msg.mtuEvt.MTU, 10, LCD_PAGE4); } else if (discState == BLE_DISC_STATE_MTU) { // MTU size response received, discover simple BLE service if (pMsg->method == ATT_EXCHANGE_MTU_RSP) { uint8_t uuid[ATT_BT_UUID_SIZE] = { LO_UINT16(SIMPLEPROFILE_SERV_UUID), HI_UINT16(SIMPLEPROFILE_SERV_UUID) }; // Just in case we're using the default MTU size (23 octets) LCD_WRITE_STRING_VALUE("MTU Size:", ATT_MTU_SIZE, 10, LCD_PAGE4); discState = BLE_DISC_STATE_SVC;

// Discovery simple BLE service VOID GATT_DiscPrimaryServiceByUUID(connHandle[connHandleIdx], uuid, ATT_BT_UUID_SIZE, selfEntity); } } else if (discState == BLE_DISC_STATE_SVC) { // Service found, store handles if (pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP && pMsg->msg.findByTypeValueRsp.numInfo > 0) { svcStartHdl = ATT_ATTR_HANDLE(pMsg->msg.findByTypeValueRsp.pHandlesInfo, 0); svcEndHdl = ATT_GRP_END_HANDLE(pMsg->msg.findByTypeValueRsp.pHandlesInfo, 0); } // If procedure complete if (((pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP) && (pMsg->hdr.status == bleProcedureComplete)) || (pMsg->method == ATT_ERROR_RSP)) { if (svcStartHdl != 0) { attReadByTypeReq_t req; // Discover characteristic discState = BLE_DISC_STATE_CHAR; req.startHandle = svcStartHdl; req.endHandle = svcEndHdl; req.type.len = ATT_BT_UUID_SIZE; req.type.uuid[0] = LO_UINT16(SIMPLEPROFILE_CHAR1_UUID); req.type.uuid[1] = HI_UINT16(SIMPLEPROFILE_CHAR1_UUID);

VOID GATT_ReadUsingCharUUID(connHandle[connHandleIdx], &req, selfEntity); } } } else if (discState == BLE_DISC_STATE_CHAR) { // Characteristic found, store handle if ((pMsg->method == ATT_READ_BY_TYPE_RSP) && (pMsg->msg.readByTypeRsp.numPairs > 0)) { charHdl[connHandleIdx] = BUILD_UINT16(pMsg->msg.readByTypeRsp.pDataList[0], pMsg->msg.readByTypeRsp.pDataList[1]); print_string("Simple Svc Found\r\n"); LCD_WRITE_STRING("Simple Svc Found", LCD_PAGE2); procedureInProgress = FALSE; } discState = BLE_DISC_STATE_IDLE; } }

Devil Sunny：

回复 chao xie:

你好，请问你的问题解决了么？我在修改主机例程时也遇到了同样的问题。

另外，我修改了CHAR1的特征值大小为20个字节，在主机读取CHAR1的特征值的时候发现只有第一个字符是对的（从机广播的CHAR1也相应修改了），请问这是什么原因？