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120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
#pragma once
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#include "ble_descriptor.h"
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#include "esphome/components/esp32_ble/ble_uuid.h"
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#include "esphome/components/bytebuffer/bytebuffer.h"
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#include <vector>
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#include <span>
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#include <functional>
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#include <memory>
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#ifdef USE_ESP32
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#include <esp_gap_ble_api.h>
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#include <esp_gatt_defs.h>
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#include <esp_gattc_api.h>
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#include <esp_gatts_api.h>
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#include <esp_bt_defs.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/semphr.h>
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namespace esphome {
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namespace esp32_ble_server {
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using namespace esp32_ble;
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using namespace bytebuffer;
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class BLEService;
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class BLECharacteristic {
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public:
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BLECharacteristic(ESPBTUUID uuid, uint32_t properties);
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~BLECharacteristic();
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void set_value(ByteBuffer buffer);
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void set_value(const std::vector<uint8_t> &buffer);
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void set_value(const std::string &buffer);
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void set_broadcast_property(bool value);
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void set_indicate_property(bool value);
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void set_notify_property(bool value);
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void set_read_property(bool value);
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void set_write_property(bool value);
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void set_write_no_response_property(bool value);
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void notify();
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void do_create(BLEService *service);
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void do_delete() { this->clients_to_notify_.clear(); }
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void gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param);
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void add_descriptor(BLEDescriptor *descriptor);
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void remove_descriptor(BLEDescriptor *descriptor);
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BLEService *get_service() { return this->service_; }
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ESPBTUUID get_uuid() { return this->uuid_; }
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std::vector<uint8_t> &get_value() { return this->value_; }
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static const uint32_t PROPERTY_READ = 1 << 0;
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static const uint32_t PROPERTY_WRITE = 1 << 1;
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static const uint32_t PROPERTY_NOTIFY = 1 << 2;
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static const uint32_t PROPERTY_BROADCAST = 1 << 3;
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static const uint32_t PROPERTY_INDICATE = 1 << 4;
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static const uint32_t PROPERTY_WRITE_NR = 1 << 5;
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bool is_created();
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bool is_failed();
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// Direct callback registration - only allocates when callback is set
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void on_write(std::function<void(std::span<const uint8_t>, uint16_t)> &&callback) {
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this->on_write_callback_ =
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std::make_unique<std::function<void(std::span<const uint8_t>, uint16_t)>>(std::move(callback));
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}
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void on_read(std::function<void(uint16_t)> &&callback) {
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this->on_read_callback_ = std::make_unique<std::function<void(uint16_t)>>(std::move(callback));
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}
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protected:
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bool write_event_{false};
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BLEService *service_{};
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ESPBTUUID uuid_;
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esp_gatt_char_prop_t properties_;
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uint16_t handle_{0xFFFF};
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uint16_t value_read_offset_{0};
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std::vector<uint8_t> value_;
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SemaphoreHandle_t set_value_lock_;
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std::vector<BLEDescriptor *> descriptors_;
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struct ClientNotificationEntry {
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uint16_t conn_id;
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bool indicate; // true = indicate, false = notify
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};
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std::vector<ClientNotificationEntry> clients_to_notify_;
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void remove_client_from_notify_list_(uint16_t conn_id);
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ClientNotificationEntry *find_client_in_notify_list_(uint16_t conn_id);
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void set_property_bit_(esp_gatt_char_prop_t bit, bool value);
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std::unique_ptr<std::function<void(std::span<const uint8_t>, uint16_t)>> on_write_callback_;
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std::unique_ptr<std::function<void(uint16_t)>> on_read_callback_;
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esp_gatt_perm_t permissions_ = ESP_GATT_PERM_READ | ESP_GATT_PERM_WRITE;
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enum State : uint8_t {
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FAILED = 0x00,
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INIT,
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CREATING,
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CREATING_DEPENDENTS,
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CREATED,
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} state_{INIT};
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};
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} // namespace esp32_ble_server
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} // namespace esphome
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#endif
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