// Copyright 2018 Espressif Systems (Shanghai) PTE LTD // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #ifndef __ESP_HF_CLIENT_API_H__ #define __ESP_HF_CLIENT_API_H__ #include "esp_err.h" #include "esp_bt_defs.h" #include "esp_hf_defs.h" #ifdef __cplusplus extern "C" { #endif #define ESP_BT_HF_CLIENT_NUMBER_LEN (32) #define ESP_BT_HF_CLIENT_OPERATOR_NAME_LEN (16) /// Bluetooth HFP RFCOMM connection and service level connection status typedef enum { ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTED = 0, /*!< RFCOMM data link channel released */ ESP_HF_CLIENT_CONNECTION_STATE_CONNECTING, /*!< connecting remote device on the RFCOMM data link*/ ESP_HF_CLIENT_CONNECTION_STATE_CONNECTED, /*!< RFCOMM connection established */ ESP_HF_CLIENT_CONNECTION_STATE_SLC_CONNECTED, /*!< service level connection established */ ESP_HF_CLIENT_CONNECTION_STATE_DISCONNECTING, /*!< disconnecting with remote device on the RFCOMM dat link*/ } esp_hf_client_connection_state_t; /// Bluetooth HFP audio connection status typedef enum { ESP_HF_CLIENT_AUDIO_STATE_DISCONNECTED = 0, /*!< audio connection released */ ESP_HF_CLIENT_AUDIO_STATE_CONNECTING, /*!< audio connection has been initiated */ ESP_HF_CLIENT_AUDIO_STATE_CONNECTED, /*!< audio connection is established */ ESP_HF_CLIENT_AUDIO_STATE_CONNECTED_MSBC, /*!< mSBC audio connection is established */ } esp_hf_client_audio_state_t; /// in-band ring tone state typedef enum { ESP_HF_CLIENT_IN_BAND_RINGTONE_NOT_PROVIDED = 0, ESP_HF_CLIENT_IN_BAND_RINGTONE_PROVIDED, } esp_hf_client_in_band_ring_state_t; /* features masks of AG */ #define ESP_HF_CLIENT_PEER_FEAT_3WAY 0x01 /* Three-way calling */ #define ESP_HF_CLIENT_PEER_FEAT_ECNR 0x02 /* Echo cancellation and/or noise reduction */ #define ESP_HF_CLIENT_PEER_FEAT_VREC 0x04 /* Voice recognition */ #define ESP_HF_CLIENT_PEER_FEAT_INBAND 0x08 /* In-band ring tone */ #define ESP_HF_CLIENT_PEER_FEAT_VTAG 0x10 /* Attach a phone number to a voice tag */ #define ESP_HF_CLIENT_PEER_FEAT_REJECT 0x20 /* Ability to reject incoming call */ #define ESP_HF_CLIENT_PEER_FEAT_ECS 0x40 /* Enhanced Call Status */ #define ESP_HF_CLIENT_PEER_FEAT_ECC 0x80 /* Enhanced Call Control */ #define ESP_HF_CLIENT_PEER_FEAT_EXTERR 0x100 /* Extended error codes */ #define ESP_HF_CLIENT_PEER_FEAT_CODEC 0x200 /* Codec Negotiation */ /* CHLD feature masks of AG */ #define ESP_HF_CLIENT_CHLD_FEAT_REL 0x01 /* 0 Release waiting call or held calls */ #define ESP_HF_CLIENT_CHLD_FEAT_REL_ACC 0x02 /* 1 Release active calls and accept other waiting or held call */ #define ESP_HF_CLIENT_CHLD_FEAT_REL_X 0x04 /* 1x Release specified active call only */ #define ESP_HF_CLIENT_CHLD_FEAT_HOLD_ACC 0x08 /* 2 Active calls on hold and accept other waiting or held call */ #define ESP_HF_CLIENT_CHLD_FEAT_PRIV_X 0x10 /* 2x Request private mode with specified call(put the rest on hold) */ #define ESP_HF_CLIENT_CHLD_FEAT_MERGE 0x20 /* 3 Add held call to multiparty */ #define ESP_HF_CLIENT_CHLD_FEAT_MERGE_DETACH 0x40 /* 4 Connect two calls and leave(disconnect from multiparty) */ /// HF CLIENT callback events typedef enum { ESP_HF_CLIENT_CONNECTION_STATE_EVT = 0, /*!< connection state changed event */ ESP_HF_CLIENT_AUDIO_STATE_EVT, /*!< audio connection state change event */ ESP_HF_CLIENT_BVRA_EVT, /*!< voice recognition state change event */ ESP_HF_CLIENT_CIND_CALL_EVT, /*!< call indication */ ESP_HF_CLIENT_CIND_CALL_SETUP_EVT, /*!< call setup indication */ ESP_HF_CLIENT_CIND_CALL_HELD_EVT, /*!< call held indication */ ESP_HF_CLIENT_CIND_SERVICE_AVAILABILITY_EVT, /*!< network service availability indication */ ESP_HF_CLIENT_CIND_SIGNAL_STRENGTH_EVT, /*!< signal strength indication */ ESP_HF_CLIENT_CIND_ROAMING_STATUS_EVT, /*!< roaming status indication */ ESP_HF_CLIENT_CIND_BATTERY_LEVEL_EVT, /*!< battery level indication */ ESP_HF_CLIENT_COPS_CURRENT_OPERATOR_EVT, /*!< current operator information */ ESP_HF_CLIENT_BTRH_EVT, /*!< call response and hold event */ ESP_HF_CLIENT_CLIP_EVT, /*!< Calling Line Identification notification */ ESP_HF_CLIENT_CCWA_EVT, /*!< call waiting notification */ ESP_HF_CLIENT_CLCC_EVT, /*!< list of current calls notification */ ESP_HF_CLIENT_VOLUME_CONTROL_EVT, /*!< audio volume control command from AG, provided by +VGM or +VGS message */ ESP_HF_CLIENT_AT_RESPONSE_EVT, /*!< AT command response event */ ESP_HF_CLIENT_CNUM_EVT, /*!< subscriber information response from AG */ ESP_HF_CLIENT_BSIR_EVT, /*!< setting of in-band ring tone */ ESP_HF_CLIENT_BINP_EVT, /*!< requested number of last voice tag from AG */ ESP_HF_CLIENT_RING_IND_EVT, /*!< ring indication event */ } esp_hf_client_cb_event_t; /// HFP client callback parameters typedef union { /** * @brief ESP_HF_CLIENT_CONNECTION_STATE_EVT */ struct hf_client_conn_stat_param { esp_hf_client_connection_state_t state; /*!< HF connection state */ uint32_t peer_feat; /*!< AG supported features */ uint32_t chld_feat; /*!< AG supported features on call hold and multiparty services */ esp_bd_addr_t remote_bda; /*!< remote bluetooth device address */ } conn_stat; /*!< HF callback param of ESP_HF_CLIENT_CONNECTION_STATE_EVT */ /** * @brief ESP_HF_CLIENT_AUDIO_STATE_EVT */ struct hf_client_audio_stat_param { esp_hf_client_audio_state_t state; /*!< audio connection state */ esp_bd_addr_t remote_bda; /*!< remote bluetooth device address */ } audio_stat; /*!< HF callback param of ESP_HF_CLIENT_AUDIO_STATE_EVT */ /** * @brief ESP_HF_CLIENT_BVRA_EVT */ struct hf_client_bvra_param { esp_hf_vr_state_t value; /*!< voice recognition state */ } bvra; /*!< HF callback param of ESP_HF_CLIENT_BVRA_EVT */ /** * @brief ESP_HF_CLIENT_CIND_SERVICE_AVAILABILITY_EVT */ struct hf_client_service_availability_param { esp_hf_service_availability_status_t status; /*!< service availability status */ } service_availability; /*!< HF callback param of ESP_HF_CLIENT_CIND_SERVICE_AVAILABILITY_EVT */ /** * @brief ESP_HF_CLIENT_CIND_ROAMING_STATUS_EVT */ struct hf_client_network_roaming_param { esp_hf_roaming_status_t status; /*!< roaming status */ } roaming; /*!< HF callback param of ESP_HF_CLIENT_CIND_ROAMING_STATUS_EVT */ /** * @brief ESP_HF_CLIENT_CIND_SIGNAL_STRENGTH_EVT */ struct hf_client_signal_strength_ind_param { int value; /*!< signal strength value, ranges from 0 to 5 */ } signal_strength; /*!< HF callback param of ESP_HF_CLIENT_CIND_SIGNAL_STRENGTH_EVT */ /** * @brief ESP_HF_CLIENT_CIND_BATTERY_LEVEL_EVT */ struct hf_client_battery_level_ind_param { int value; /*!< battery charge value, ranges from 0 to 5 */ } battery_level; /*!< HF callback param of ESP_HF_CLIENT_CIND_BATTERY_LEVEL_EVT */ /** * @brief ESP_HF_CLIENT_COPS_CURRENT_OPERATOR_EVT */ struct hf_client_current_operator_param { const char *name; /*!< name of the network operator */ } cops; /*!< HF callback param of ESP_HF_CLIENT_COPS_CURRENT_OPERATOR_EVT */ /** * @brief ESP_HF_CLIENT_CIND_CALL_EVT */ struct hf_client_call_ind_param { esp_hf_call_status_t status; /*!< call status indicator */ } call; /*!< HF callback param of ESP_HF_CLIENT_CIND_CALL_EVT */ /** * @brief ESP_HF_CLIENT_CIND_CALL_SETUP_EVT */ struct hf_client_call_setup_ind_param { esp_hf_call_setup_status_t status; /*!< call setup status indicator */ } call_setup; /*!< HF callback param of ESP_HF_CLIENT_BVRA_EVT */ /** * @brief ESP_HF_CLIENT_CIND_CALL_HELD_EVT */ struct hf_client_call_held_ind_param { esp_hf_call_held_status_t status; /*!< bluetooth proprietary call hold status indicator */ } call_held; /*!< HF callback param of ESP_HF_CLIENT_CIND_CALL_HELD_EVT */ /** * @brief ESP_HF_CLIENT_BTRH_EVT */ struct hf_client_btrh_param { esp_hf_btrh_status_t status; /*!< call hold and response status result code */ } btrh; /*!< HF callback param of ESP_HF_CLIENT_BRTH_EVT */ /** * @brief ESP_HF_CLIENT_CLIP_EVT */ struct hf_client_clip_param { const char *number; /*!< phone number string of call */ } clip; /*!< HF callback param of ESP_HF_CLIENT_CLIP_EVT */ /** * @brief ESP_HF_CLIENT_CCWA_EVT */ struct hf_client_ccwa_param { const char *number; /*!< phone number string of waiting call */ } ccwa; /*!< HF callback param of ESP_HF_CLIENT_BVRA_EVT */ /** * @brief ESP_HF_CLIENT_CLCC_EVT */ struct hf_client_clcc_param { int idx; /*!< numbering(starting with 1) of the call */ esp_hf_current_call_direction_t dir; /*!< direction of the call */ esp_hf_current_call_status_t status; /*!< status of the call */ esp_hf_current_call_mpty_type_t mpty; /*!< multi-party flag */ char *number; /*!< phone number(optional) */ } clcc; /*!< HF callback param of ESP_HF_CLIENT_CLCC_EVT */ /** * @brief ESP_HF_CLIENT_VOLUME_CONTROL_EVT */ struct hf_client_volume_control_param { esp_hf_volume_control_target_t type; /*!< volume control target, speaker or microphone */ int volume; /*!< gain, ranges from 0 to 15 */ } volume_control; /*!< HF callback param of ESP_HF_CLIENT_VOLUME_CONTROL_EVT */ /** * @brief ESP_HF_CLIENT_AT_RESPONSE_EVT */ struct hf_client_at_response_param { esp_hf_at_response_code_t code; /*!< AT response code */ esp_hf_cme_err_t cme; /*!< Extended Audio Gateway Error Result Code */ } at_response; /*!< HF callback param of ESP_HF_CLIENT_AT_RESPONSE_EVT */ /** * @brief ESP_HF_CLIENT_CNUM_EVT */ struct hf_client_cnum_param { const char *number; /*!< phone number string */ esp_hf_subscriber_service_type_t type; /*!< service type that the phone number relates to */ } cnum; /*!< HF callback param of ESP_HF_CLIENT_CNUM_EVT */ /** * @brief ESP_HF_CLIENT_BSIR_EVT */ struct hf_client_bsirparam { esp_hf_client_in_band_ring_state_t state; /*!< setting state of in-band ring tone */ } bsir; /*!< HF callback param of ESP_HF_CLIENT_BSIR_EVT */ /** * @brief ESP_HF_CLIENT_BINP_EVT */ struct hf_client_binp_param { const char *number; /*!< phone number corresponding to the last voice tag in the HF */ } binp; /*!< HF callback param of ESP_HF_CLIENT_BINP_EVT */ } esp_hf_client_cb_param_t; /** * @brief HFP client incoming data callback function, the callback is useful in case of * Voice Over HCI. * @param[in] buf : pointer to incoming data(payload of HCI synchronous data packet), the * buffer is allocated inside bluetooth protocol stack and will be released after * invoke of the callback is finished. * @param[in] len : size(in bytes) in buf */ typedef void (* esp_hf_client_incoming_data_cb_t)(const uint8_t *buf, uint32_t len); /** * @brief HFP client outgoing data callback function, the callback is useful in case of * Voice Over HCI. Once audio connection is set up and the application layer has * prepared data to send, the lower layer will call this function to read data * and then send. This callback is supposed to be implemented as non-blocking, * and if data is not enough, return value 0 is supposed. * * @param[in] buf : pointer to incoming data(payload of HCI synchronous data packet), the * buffer is allocated inside bluetooth protocol stack and will be released after * invoke of the callback is finished. * @param[in] len : size(in bytes) in buf * @param[out] length of data successfully read */ typedef uint32_t (* esp_hf_client_outgoing_data_cb_t)(uint8_t *buf, uint32_t len); /** * @brief HFP client callback function type * * @param event : Event type * * @param param : Pointer to callback parameter */ typedef void (* esp_hf_client_cb_t)(esp_hf_client_cb_event_t event, esp_hf_client_cb_param_t *param); /** * @brief Register application callback function to HFP client module. This function should be called * only after esp_bluedroid_enable() completes successfully, used by HFP client * * @param[in] callback: HFP client event callback function * * @return * - ESP_OK: success * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: if callback is a NULL function pointer * */ esp_err_t esp_hf_client_register_callback(esp_hf_client_cb_t callback); /** * * @brief Initialize the bluetooth HFP client module. This function should be called * after esp_bluedroid_enable() completes successfully * * @return * - ESP_OK: if the initialization request is sent successfully * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_init(void); /** * * @brief De-initialize for HFP client module. This function * should be called only after esp_bluedroid_enable() completes successfully * * @return * - ESP_OK: success * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_deinit(void); /** * * @brief Connect to remote bluetooth HFP audio gateway(AG) device, must after esp_a2d_hf_client_init() * * @param[in] remote_bda: remote bluetooth device address * * @return * - ESP_OK: connect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_connect(esp_bd_addr_t remote_bda); /** * * @brief Disconnect from the remote HFP audio gateway * * @param[in] remote_bda: remote bluetooth device address * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_disconnect(esp_bd_addr_t remote_bda); /** * * @brief Create audio connection with remote HFP AG. As a precondition to use this API, * Service Level Connection shall exist with AG * * @param[in] remote_bda: remote bluetooth device address * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_connect_audio(esp_bd_addr_t remote_bda); /** * * @brief Release the established audio connection with remote HFP AG. * * @param[in] remote_bda: remote bluetooth device address * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_disconnect_audio(esp_bd_addr_t remote_bda); /** * * @brief Enable voice recognition in the AG. As a precondition to use this API, * Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_start_voice_recognition(void); /** * * @brief Disable voice recognition in the AG. As a precondition to use this API, * Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_stop_voice_recognition(void); /** * * @brief Volume synchronization with AG. As a precondition to use this API, * Service Level Connection shall exist with AG * * @param[in] type: volume control target, speaker or microphone * @param[in] volume: gain of the speaker of microphone, ranges 0 to 15 * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_volume_update(esp_hf_volume_control_target_t type, int volume); /** * * @brief Place a call with a specified number, if number is NULL, last called number is * called. As a precondition to use this API, Service Level Connection shall * exist with AG * * @param[in] number: number string of the call. If NULL, the last number is called(aka re-dial) * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_dial(const char *number); /** * * @brief Place a call with number specified by location(speed dial). As a precondition, * to use this API, Service Level Connection shall exist with AG * * @param[in] location: location of the number in the memory * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_dial_memory(int location); /** * * @brief Send call hold and multiparty commands, or enhanced call control commands(Use AT+CHLD). * As a precondition to use this API, Service Level Connection shall exist with AG * * @param[in] chld: AT+CHLD call hold and multiparty handling AT command. * @param[in] idx: used in Enhanced Call Control Mechanisms, used if chld is * ESP_HF_CHLD_TYPE_REL_X or ESP_HF_CHLD_TYPE_PRIV_X * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_send_chld_cmd(esp_hf_chld_type_t chld, int idx); /** * * @brief Send response and hold action command(Send AT+BTRH command) * As a precondition to use this API, Service Level Connection shall exist with AG * * @param[in] btrh: response and hold action to send * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_send_btrh_cmd(esp_hf_btrh_cmd_t btrh); /** * * @brief Answer an incoming call(send ATA command). As a precondition to use this API, * Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_answer_call(void); /** * * @brief Reject an incoming call(send AT+CHUP command), As a precondition to use this API, * Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_reject_call(void); /** * * @brief Query list of current calls in AG(send AT+CLCC command), As a precondition to use this API, * Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_query_current_calls(void); /** * * @brief Query the name of currently selected network operator in AG(use AT+COPS commands) * As a precondition to use this API, Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_query_current_operator_name(void); /** * * @brief Get subscriber information number from AG(send AT+CNUM command) * As a precondition to use this API, Service Level Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_retrieve_subscriber_info(void); /** * * @brief Transmit DTMF codes during an ongoing call(use AT+VTS commands) * As a precondition to use this API, Service Level Connection shall exist with AG * * @param[in] code: dtmf code, single ascii character in the set 0-9, #, *, A-D * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_send_dtmf(char code); /** * * @brief Request a phone number from AG corresponding to last voice tag recorded * (send AT+BINP command). As a precondition to use this API, Service Level * Connection shall exist with AG * * @return * - ESP_OK: disconnect request is sent to lower layer * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: others * */ esp_err_t esp_hf_client_request_last_voice_tag_number(void); /** * @brief Register HFP client data output function; the callback is only used in * the case that Voice Over HCI is enabled. * * @param[in] recv: HFP client incoming data callback function * @param[in] send: HFP client outgoing data callback function * * @return * - ESP_OK: success * - ESP_INVALID_STATE: if bluetooth stack is not yet enabled * - ESP_FAIL: if callback is a NULL function pointer * */ esp_err_t esp_hf_client_register_data_callback(esp_hf_client_incoming_data_cb_t recv, esp_hf_client_outgoing_data_cb_t send); /** * @brief Trigger the lower-layer to fetch and send audio data. This function is only * only used in the case that Voice Over HCI is enabled. Precondition is that * the HFP audio connection is connected. After this function is called, lower * layer will invoke esp_hf_client_outgoing_data_cb_t to fetch data * */ void esp_hf_client_outgoing_data_ready(void); /** * @brief Initialize the down sampling converter. This is a utility function that can * only be used in the case that Voice Over HCI is enabled. * * @param[in] src_sps: original samples per second(source audio data, i.e. 48000, 32000, * 16000, 44100, 22050, 11025) * @param[in] bits: number of bits per pcm sample (16) * @param[in] channels: number of channels (i.e. mono(1), stereo(2)...) */ void esp_hf_client_pcm_resample_init(uint32_t src_sps, uint32_t bits, uint32_t channels); /** * @brief Down sampling utility to convert high sampling rate into 8K/16bits 1-channel mode PCM * samples. This can only be used in the case that Voice Over HCI is enabled. * * @param[in] src: pointer to the buffer where the original sampling PCM are stored * @param[in] in_bytes: length of the input PCM sample buffer in byte * @param[in] dst: pointer to the buffer which is to be used to store the converted PCM samples * * @return number of samples converted */ int32_t esp_hf_client_pcm_resample(void *src, uint32_t in_bytes, void *dst); #ifdef __cplusplus } #endif #endif /* __ESP_HF_CLIENT_API_H__ */