Hi,
Why doesn't GATT_DiscCharsByUUID(pMsg->connHandle, &req, selfEntity) find any handles?
I have created a custom profile with a read-/writeable characteristic.
To discover the characteristic I use the function "multi_role_processGATTDiscEvent(gattMsgEvent_t *pMsg)" which originally discovers the "SIMPLE_SERVICE".
Inside this function I changed the the service uuid and characteristic uuid to my uuids , now the program is able to discover my service but not my characteristic.
I assume the problem occurs at "GATT_DiscCharsByUUID(pMsg->connHandle, &req, selfEntity);" cause the number of attribute handle-UUID pairs (numPairs) found is 0.
However the problem might be a little earlier in the code, because my service end handle is 65535.
For further details please see the code below.
Thanks in advance.
Sebastian
static void multi_role_processGATTDiscEvent(gattMsgEvent_t *pMsg)
{
...
else if (discInfo[connIndex].discState == BLE_DISC_STATE_MTU) // MTU size response received, discover simple service
{
...
// old: uint8_t uuid[ATT_BT_UUID_SIZE] = { LO_UINT16(SIMPLEPROFILE_SERV_UUID), HI_UINT16(SIMPLEPROFILE_SERV_UUID) }; // uuid = FFF0
uint8_t My_uuid[ATT_BT_UUID_SIZE] = { LO_UINT16(MY_RW_SERVICE_SERV_UUID), HI_UINT16(MY_RW_SERVICE_SERV_UUID) }; // uuid = BA55
discInfo[connIndex].discState= BLE_DISC_STATE_SVC;
// Discovery of simple service
//old: VOID GATT_DiscPrimaryServiceByUUID(pMsg->connHandle, uuid, ATT_BT_UUID_SIZE, selfEntity);
VOID GATT_DiscPrimaryServiceByUUID(pMsg->connHandle, My_uuid, ATT_BT_UUID_SIZE, selfEntity);
}
else if (discInfo[connIndex].discState == BLE_DISC_STATE_SVC) // If we're performing service discovery
{
// Service found, store handles
if (pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP && pMsg->msg.findByTypeValueRsp.numInfo > 0)
{
discInfo[connIndex].svcStartHdl = ATT_ATTR_HANDLE(pMsg->msg.findByTypeValueRsp.pHandlesInfo, 0); // svcStartHdl = 47
discInfo[connIndex].svcEndHdl = ATT_GRP_END_HANDLE(pMsg->msg.findByTypeValueRsp.pHandlesInfo, 0); // svcEndHdl = 65535
}
// If procedure is complete
if (((pMsg->method == ATT_FIND_BY_TYPE_VALUE_RSP) && (pMsg->hdr.status == bleProcedureComplete)) || (pMsg->method == ATT_ERROR_RSP))
{
// If we've discovered the service
if (discInfo[connIndex].svcStartHdl != 0)
{
attReadByTypeReq_t req;
// Discover characteristic --> MY_RW_SERVICE_MYREADWRITE_UUID = 0xDEAD
discInfo[connIndex].discState = BLE_DISC_STATE_CHAR;
req.startHandle = discInfo[connIndex].svcStartHdl;
req.endHandle = discInfo[connIndex].svcEndHdl;
req.type.len = ATT_BT_UUID_SIZE;
req.type.uuid[0] = LO_UINT16(MY_RW_SERVICE_MYREADWRITE_UUID); //old: SIMPLEPROFILE_CHAR1_UUID
req.type.uuid[1] = HI_UINT16(MY_RW_SERVICE_MYREADWRITE_UUID); //old: SIMPLEPROFILE_CHAR1_UUID
// Send characteristic discovery request
VOID GATT_DiscCharsByUUID(pMsg->connHandle, &req, selfEntity);
}
}
}
// If we're discovering characteristics
else if (discInfo[connIndex].discState == BLE_DISC_STATE_CHAR)
{
// Characteristic found
// --> I get ATT_READ_BY_TYPE_RSP but numPairs = 0 !!!
if ((pMsg->method == ATT_READ_BY_TYPE_RSP) && (pMsg->msg.readByTypeRsp.numPairs > 0))
{
// Store handle
discInfo[connIndex].charHdl = BUILD_UINT16(pMsg->msg.readByTypeRsp.pDataList[3],
pMsg->msg.readByTypeRsp.pDataList[4]);
Display_print0(dispHandle, MR_ROW_STATUS1, 0, "my Svc Found");
Display_print2(dispHandle, 18, 0, "lowbyte3: %d, highbyte4: %d", pMsg->msg.readByTypeRsp.pDataList[3], pMsg->msg.readByTypeRsp.pDataList[4]);
Display_print1(dispHandle, 22, 0, "charHdl: %d", discInfo[connIndex].charHdl);
}
}
}
Hi Jan,
