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Server: Add onSubscribe() callback for characteristics. (#21)

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Server: Add onSubscribe() callback for characteristics.

Adds a new method to NimBLECharacteristicCallbacks that gets called when a client
changes it's subscription status.

* Remove NimBLE2902 class.

As the NimBLE2902 class usefulness was only related to callback functions that were replaced
by the NimBLECharacteristicCallbacks:onSubscribe() method this removes the NimBLE2902 class and
moves all subscription handling to NimBLECharacteristic.

* Update documents and examples to reflect this change.

* Add getSubscribedCount() to get the number of subscribed clients.
This commit is contained in:
h2zero
2020-07-27 21:11:38 -06:00
committed by GitHub
parent fe4586a3ca
commit 4723b1cc53
9 changed files with 93 additions and 236 deletions
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src/NimBLEService.cpp
-17
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@@ -147,31 +147,14 @@ bool NimBLEService::start() {
for(uint8_t i=0; i < numChrs;) {
uint8_t numDscs = pCharacteristic->m_dscVec.size();
if(numDscs) {
// skip 2902 as it's automatically created by NimBLE
// if Indicate or Notify flags are set
if(((pCharacteristic->m_properties & BLE_GATT_CHR_F_INDICATE) ||
(pCharacteristic->m_properties & BLE_GATT_CHR_F_NOTIFY)) &&
pCharacteristic->getDescriptorByUUID("2902") != nullptr)
{
numDscs--;
}
}
if(!numDscs){
pChr_a[i].descriptors = NULL;
} else {
// Must have last descriptor uuid = 0 so we have to create 1 extra
//NIMBLE_LOGD(LOG_TAG, "Adding %d descriptors", numDscs);
pDsc_a = new ble_gatt_dsc_def[numDscs+1];
NimBLEDescriptor* pDescriptor = *pCharacteristic->m_dscVec.begin();
for(uint8_t d=0; d < numDscs;) {
// skip 2902
if(pDescriptor->m_uuid == NimBLEUUID(uint16_t(0x2902))) {
//NIMBLE_LOGD(LOG_TAG, "Skipped 0x2902");
pDescriptor = *(pCharacteristic->m_dscVec.begin()+d+1);
continue;
}
pDsc_a[d].uuid = &pDescriptor->m_uuid.getNative()->u;
pDsc_a[d].att_flags = pDescriptor->m_properties;
pDsc_a[d].min_key_size = 0;