AT API Reference

Header File

components/at/include/esp_at_core.h

Functions

void esp_at_module_init(uint32_t netconn_max, const uint8_t *custom_version)

This function should be called only once, before any other AT functions are called.

Parameters

netconn_max – the maximum number of the link in the at module
custom_version – version information by custom

esp_at_para_parse_result_type esp_at_get_para_as_digit(int32_t para_index, int32_t *value)

Parse digit parameter from command string.

Parameters

para_index – the index of parameter
value – the value parsed

Returns

ESP_AT_PARA_PARSE_RESULT_OK : succeed
ESP_AT_PARA_PARSE_RESULT_FAIL : fail
ESP_AT_PARA_PARSE_RESULT_OMITTED : this parameter is OMITTED

esp_at_para_parse_result_type esp_at_get_para_as_float(int32_t para_index, float *value)

Parse float parameter from command string.

Parameters

para_index – the index of parameter
value – the value parsed

Returns

ESP_AT_PARA_PARSE_RESULT_OK : succeed
ESP_AT_PARA_PARSE_RESULT_FAIL : fail
ESP_AT_PARA_PARSE_RESULT_OMITTED : this parameter is OMITTED

esp_at_para_parse_result_type esp_at_get_para_as_str(int32_t para_index, uint8_t **result)

Parse string parameter from command string.

Parameters

para_index – the index of parameter
result – the pointer that point to the result.

Returns

ESP_AT_PARA_PARSE_RESULT_OK : succeed
ESP_AT_PARA_PARSE_RESULT_FAIL : fail
ESP_AT_PARA_PARSE_RESULT_OMITTED : this parameter is OMITTED

void esp_at_port_recv_data_notify_from_isr(int32_t len)

Calling the esp_at_port_recv_data_notify_from_isr to notify at module that at port received data. When received this notice,at task will get data by calling get_data_length and read_data in esp_at_device_ops. This function MUST be used in isr.

Parameters: len – data length

bool esp_at_port_recv_data_notify(int32_t len, uint32_t msec)

Calling the esp_at_port_recv_data_notify to notify at module that at port received data. When received this notice,at task will get data by calling get_data_length and read_data in esp_at_device_ops. This function MUST NOT be used in isr.

Parameters

len – data length
msec – timeout time,The unit is millisecond. It waits forever,if msec is portMAX_DELAY.

Returns

true : succeed
false : fail

void esp_at_transmit_terminal_from_isr(void): terminal transparent transmit mode,This function MUST be used in isr.

void esp_at_transmit_terminal(void): terminal transparent transmit mode,This function MUST NOT be used in isr.

bool esp_at_custom_cmd_array_regist(const esp_at_cmd_struct *custom_at_cmd_array, uint32_t cmd_num)

regist at command set, which defined by custom,

Parameters

custom_at_cmd_array – at command set
cmd_num – command number

void esp_at_device_ops_regist(esp_at_device_ops_struct *ops)

regist device operate functions set,

Parameters: ops – device operate functions set

bool esp_at_custom_net_ops_regist(int32_t link_id, esp_at_custom_net_ops_struct *ops)

bool esp_at_custom_ble_ops_regist(int32_t conn_index, esp_at_custom_ble_ops_struct *ops)

void esp_at_custom_ops_regist(esp_at_custom_ops_struct *ops)

regist custom operate functions set interacting with AT,

Parameters: ops – custom operate functions set

uint32_t esp_at_get_version(void)

get at module version number,

Returns: at version bit31~bit24: at main version bit23~bit16: at sub version bit15~bit8 : at test version bit7~bit0 : at custom version

void esp_at_response_result(uint8_t result_code)

response AT process result,

Parameters: result_code – see esp_at_result_code_string_index

int32_t esp_at_port_write_data(uint8_t *data, int32_t len)

write data into device,

Parameters

data – data buffer to be written
len – data length

Returns

>= 0 : the real length of the data written
others : fail.

int32_t esp_at_port_active_write_data(uint8_t *data, int32_t len)

call pre_active_write_data_callback() first and then write data into device,

Parameters

data – data buffer to be written
len – data length

Returns

>= 0 : the real length of the data written
others : fail.

int32_t esp_at_port_read_data(uint8_t *data, int32_t len)

read data from device,

Parameters

data – data buffer
len – data length

Returns

>= 0 : the real length of the data read from device
others : fail

bool esp_at_port_wait_write_complete(int32_t timeout_msec)

wait for transmitting data completely to peer device,

Parameters

timeout_msec – timeout time,The unit is millisecond.

Returns

true : succeed,transmit data completely
false : fail

int32_t esp_at_port_get_data_length(void)

get the length of the data received,

Returns

>= 0 : the length of the data received
others : fail

bool esp_at_base_cmd_regist(void): regist at base command set. If not,you can not use AT base command

bool esp_at_user_cmd_regist(void): regist at user command set. If not,you can not use AT user command

bool esp_at_wifi_cmd_regist(void): regist at wifi command set. If not,you can not use AT wifi command

bool esp_at_net_cmd_regist(void): regist at net command set. If not,you can not use AT net command

bool esp_at_mdns_cmd_regist(void): regist at mdns command set. If not,you can not use AT mdns command

bool esp_at_driver_cmd_regist(void): regist at driver command set. If not,you can not use AT driver command

bool esp_at_wps_cmd_regist(void): regist at wps command set. If not,you can not use AT wps command

bool esp_at_smartconfig_cmd_regist(void): regist at smartconfig command set. If not,you can not use AT smartconfig command

bool esp_at_ping_cmd_regist(void): regist at ping command set. If not,you can not use AT ping command

bool esp_at_http_cmd_regist(void): regist at http command set. If not,you can not use AT http command

bool esp_at_mqtt_cmd_regist(void): regist at mqtt command set. If not,you can not use AT mqtt command

bool esp_at_ble_cmd_regist(void): regist at ble command set. If not,you can not use AT ble command

bool esp_at_ble_hid_cmd_regist(void): regist at ble hid command set. If not,you can not use AT ble hid command

bool esp_at_blufi_cmd_regist(void): regist at blufi command set. If not,you can not use AT blufi command

bool esp_at_bt_cmd_regist(void): regist at bt command set. If not,you can not use AT bt command

bool esp_at_bt_spp_cmd_regist(void): regist at bt spp command set. If not,you can not use AT bt spp command

bool esp_at_bt_a2dp_cmd_regist(void): regist at bt a2dp command set. If not,you can not use AT bt a2dp command

bool esp_at_fs_cmd_regist(void): regist at fs command set. If not,you can not use AT fs command

bool esp_at_eap_cmd_regist(void): regist at WPA2 Enterprise AP command set. If not,you can not use AT EAP command

bool esp_at_eth_cmd_regist(void): regist at ethernet command set. If not,you can not use AT ethernet command

bool esp_at_custom_cmd_line_terminator_set(uint8_t *terminator)

Set AT command terminator, by default, the terminator is “\r\n” You can change it by calling this function, but it just supports one character now.

Parameters

terminator – the line terminator

Returns

true : succeed,transmit data completely
false : fail

uint8_t *esp_at_custom_cmd_line_terminator_get(void)

Get AT command line terminator,by default, the return string is “\r\n”.

Returns: the command line terminator

const esp_partition_t *esp_at_custom_partition_find(esp_partition_type_t type, esp_partition_subtype_t subtype, const char *label)

Find the partition which is defined in at_customize.csv.

Parameters

type – the type of the partition
subtype – the subtype of the partition
label – Partition label

Returns

pointer to esp_partition_t structure, or NULL if no partition is found. This pointer is valid for the lifetime of the application

void esp_at_port_enter_specific(esp_at_port_specific_callback_t callback)

Set AT core as specific status, it will call callback if receiving data. for example:

static void wait_data_callback (void)
{
    xSemaphoreGive(sync_sema);
}

void process_task(void* para)
{
    vSemaphoreCreateBinary(sync_sema);
    xSemaphoreTake(sync_sema,portMAX_DELAY);
    esp_at_port_write_data((uint8_t *)">",strlen(">"));
    esp_at_port_enter_specific(wait_data_callback);
    while(xSemaphoreTake(sync_sema,portMAX_DELAY)) {
        len = esp_at_port_read_data(data, data_len);
        // TODO:
    }
}

Parameters: callback – which will be called when received data from AT port

void esp_at_port_exit_specific(void): Exit AT core as specific status.

const uint8_t *esp_at_get_current_cmd_name(void): Get current AT command name.

void at_handle_result_code(esp_at_result_code_string_index code, void *pbuf)

Structures

struct esp_at_cmd_struct

esp_at_cmd_struct used for define at command

Public Members

char *at_cmdName: at command name

uint8_t (*at_testCmd)(uint8_t *cmd_name): Test Command function pointer

uint8_t (*at_queryCmd)(uint8_t *cmd_name): Query Command function pointer

uint8_t (*at_setupCmd)(uint8_t para_num): Setup Command function pointer

uint8_t (*at_exeCmd)(uint8_t *cmd_name): Execute Command function pointer

struct esp_at_device_ops_struct

esp_at_device_ops_struct device operate functions struct for AT

Public Members

int32_t (*read_data)(uint8_t *data, int32_t len): read data from device

int32_t (*write_data)(uint8_t *data, int32_t len): write data into device

int32_t (*get_data_length)(void): get the length of data received

bool (*wait_write_complete)(int32_t timeout_msec): wait write finish

struct esp_at_custom_net_ops_struct

esp_at_custom_net_ops_struct custom socket callback for AT

Public Members

int32_t (*recv_data)(uint8_t *data, int32_t len): callback when socket received data

void (*connect_cb)(void): callback when socket connection is built

void (*disconnect_cb)(void): callback when socket connection is disconnected

struct esp_at_custom_ble_ops_struct

esp_at_custom_ble_ops_struct custom ble callback for AT

Public Members

int32_t (*recv_data)(uint8_t *data, int32_t len): callback when ble received data

void (*connect_cb)(void): callback when ble connection is built

void (*disconnect_cb)(void): callback when ble connection is disconnected

struct esp_at_custom_ops_struct

esp_at_ops_struct some custom function interacting with AT

Public Members

void (*status_callback)(esp_at_status_type status): callback when AT status changes

void (*pre_sleep_callback)(at_sleep_mode_t mode): callback before enter modem sleep and light sleep

void (*pre_deepsleep_callback)(void): callback before enter deep sleep

void (*pre_restart_callback)(void): callback before restart

void (*pre_active_write_data_callback)(at_write_data_fn_t): callback before write data

Macros

at_min(x, y)

at_max(x, y)

ESP_AT_ERROR_NO(subcategory, extension)

ESP_AT_CMD_ERROR_OK: No Error

ESP_AT_CMD_ERROR_NON_FINISH: terminator character not found (“\r\n” expected)

ESP_AT_CMD_ERROR_NOT_FOUND_AT: Starting “AT” not found (or at, At or aT entered)

ESP_AT_CMD_ERROR_PARA_LENGTH(which_para): parameter length mismatch

ESP_AT_CMD_ERROR_PARA_TYPE(which_para): parameter type mismatch

ESP_AT_CMD_ERROR_PARA_NUM(need, given): parameter number mismatch

ESP_AT_CMD_ERROR_PARA_INVALID(which_para): the parameter is invalid

ESP_AT_CMD_ERROR_PARA_PARSE_FAIL(which_para): parse parameter fail

ESP_AT_CMD_ERROR_CMD_UNSUPPORT: the command is not supported

ESP_AT_CMD_ERROR_CMD_EXEC_FAIL(result): the command execution failed

ESP_AT_CMD_ERROR_CMD_PROCESSING: processing of previous command is in progress

ESP_AT_CMD_ERROR_CMD_OP_ERROR: the command operation type is error

Type Definitions

typedef int32_t (*at_write_data_fn_t)(uint8_t *data, int32_t len)

typedef void (*esp_at_port_specific_callback_t)(void): AT specific callback type.

Enumerations

enum esp_at_status_type

esp_at_status some custom function interacting with AT

Values:

enumerator ESP_AT_STATUS_NORMAL: Normal mode.Now mcu can send AT command

enumerator ESP_AT_STATUS_TRANSMIT: Transparent Transmition mode

enum at_sleep_mode_t

Values:

enumerator AT_DISABLE_SLEEP

enumerator AT_MIN_MODEM_SLEEP

enumerator AT_LIGHT_SLEEP

enumerator AT_MAX_MODEM_SLEEP

enumerator AT_SLEEP_MAX

enum esp_at_module

module number,Now just AT module

Values:

enumerator ESP_AT_MODULE_NUM: AT module

enum esp_at_error_code

subcategory number

Values:

enumerator ESP_AT_SUB_OK: OK

enumerator ESP_AT_SUB_COMMON_ERROR: reserved

enumerator ESP_AT_SUB_NO_TERMINATOR: terminator character not found (“\r\n” expected)

enumerator ESP_AT_SUB_NO_AT: Starting “AT” not found (or at, At or aT entered)

enumerator ESP_AT_SUB_PARA_LENGTH_MISMATCH: parameter length mismatch

enumerator ESP_AT_SUB_PARA_TYPE_MISMATCH: parameter type mismatch

enumerator ESP_AT_SUB_PARA_NUM_MISMATCH: parameter number mismatch

enumerator ESP_AT_SUB_PARA_INVALID: the parameter is invalid

enumerator ESP_AT_SUB_PARA_PARSE_FAIL: parse parameter fail

enumerator ESP_AT_SUB_UNSUPPORT_CMD: the command is not supported

enumerator ESP_AT_SUB_CMD_EXEC_FAIL: the command execution failed

enumerator ESP_AT_SUB_CMD_PROCESSING: processing of previous command is in progress

enumerator ESP_AT_SUB_CMD_OP_ERROR: the command operation type is error

enum esp_at_para_parse_result_type

the result of AT parse

Values:

enumerator ESP_AT_PARA_PARSE_RESULT_FAIL: parse fail,Maybe the type of parameter is mismatched,or out of range

enumerator ESP_AT_PARA_PARSE_RESULT_OK: Successful

enumerator ESP_AT_PARA_PARSE_RESULT_OMITTED: the parameter is OMITTED.

enum esp_at_result_code_string_index

the result code of AT command processing

Values:

enumerator ESP_AT_RESULT_CODE_OK: “OK”

enumerator ESP_AT_RESULT_CODE_ERROR: “ERROR”

enumerator ESP_AT_RESULT_CODE_FAIL: “ERROR”

enumerator ESP_AT_RESULT_CODE_SEND_OK: “SEND OK”

enumerator ESP_AT_RESULT_CODE_SEND_FAIL: “SEND FAIL”

enumerator ESP_AT_RESULT_CODE_IGNORE: response nothing, just change internal status

enumerator ESP_AT_RESULT_CODE_PROCESS_DONE: response nothing, just change internal status

enumerator ESP_AT_RESULT_CODE_OK_AND_INPUT_PROMPT

enumerator ESP_AT_RESULT_CODE_MAX

Header File

components/at/include/esp_at.h

Functions

const char *esp_at_get_current_module_name(void): get current module name

const char *esp_at_get_module_name_by_id(uint32_t id): get module name by index

uint32_t esp_at_get_module_id(void): get current module id

void esp_at_board_init(void): init peripheral and default parameters in factory_param.bin

bool esp_at_web_server_cmd_regist(void): regist WiFi config via web command. If not,you can not use web server to config wifi connect

void esp_at_main_preprocess(void): some workarounds for esp-at project

Macros

ESP_AT_PORT_TX_WAIT_MS_MAX

ESP_AT_FACTORY_PARAMETER_SIZE

Provide feedback about this document