h2zero/esp-nimble-cpp
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Add NimBLEAttValue class. (#67)

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This is a specialized container class to hold BLE attribute values.

- Removes the use of std::string previously used to store the values.
- Allows for setting/getting/notifying values from std::string, std::vector<uint8_t>, Arduino String, const char*, and uint8_t buffers.
- Has operators retrieve the value as std::string, Arduino String, std::vector<uint8_t>, uint8_t* or char pointers.
- Includes iterators and subscript/random access operator.
- Introduces a max length parameter to the creation of server characteristics/descriptors to limit the size of the memory footprint.
- Nearly Seamless integration with existing code.
- Adds a config option to enable/disable timestamp storage when the value is updated.
- Adds a config option to specify the initial size of the value container if not specified in the constructor.
This commit is contained in:
h2zero
2022-01-16 20:11:18 -07:00
committed by GitHub
parent be9cdc1ab6
commit e3ee082dd7
17 changed files with 901 additions and 296 deletions
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14
src/NimBLEClient.cpp
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@@ -768,11 +768,11 @@ int NimBLEClient::serviceDiscoveredCB(
* @param [in] characteristicUUID The characteristic whose value we wish to read.
* @returns characteristic value or an empty string if not found
*/
std::string NimBLEClient::getValue(const NimBLEUUID &serviceUUID, const NimBLEUUID &characteristicUUID) {
NimBLEAttValue NimBLEClient::getValue(const NimBLEUUID &serviceUUID, const NimBLEUUID &characteristicUUID) {
NIMBLE_LOGD(LOG_TAG, ">> getValue: serviceUUID: %s, characteristicUUID: %s",
serviceUUID.toString().c_str(), characteristicUUID.toString().c_str());
std::string ret = "";
NimBLEAttValue ret;
NimBLERemoteService* pService = getService(serviceUUID);
if(pService != nullptr) {
@@ -796,7 +796,7 @@ std::string NimBLEClient::getValue(const NimBLEUUID &serviceUUID, const NimBLEUU
* @returns true if successful otherwise false
*/
bool NimBLEClient::setValue(const NimBLEUUID &serviceUUID, const NimBLEUUID &characteristicUUID,
const std::string &value, bool response)
const NimBLEAttValue &value, bool response)
{
NIMBLE_LOGD(LOG_TAG, ">> setValue: serviceUUID: %s, characteristicUUID: %s",
serviceUUID.toString().c_str(), characteristicUUID.toString().c_str());
@@ -857,7 +857,7 @@ uint16_t NimBLEClient::getMTU() {
* @param [in] arg A pointer to the client instance that registered for this callback.
*/
/*STATIC*/
int NimBLEClient::handleGapEvent(struct ble_gap_event *event, void *arg) {
int NimBLEClient::handleGapEvent(struct ble_gap_event *event, void *arg) {
NimBLEClient* client = (NimBLEClient*)arg;
int rc;
@@ -976,11 +976,7 @@ uint16_t NimBLEClient::getMTU() {
(*characteristic)->toString().c_str());
uint32_t data_len = OS_MBUF_PKTLEN(event->notify_rx.om);
time_t t = time(nullptr);
ble_npl_hw_enter_critical();
(*characteristic)->m_value = std::string((char *)event->notify_rx.om->om_data, data_len);
(*characteristic)->m_timestamp = t;
ble_npl_hw_exit_critical(0);
(*characteristic)->m_value.setValue(event->notify_rx.om->om_data, data_len);
if ((*characteristic)->m_notifyCallback != nullptr) {
NIMBLE_LOGD(LOG_TAG, "Invoking callback for notification on characteristic %s",