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/*
* SPDX-FileCopyrightText: 2017-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "esp_log.h"
#include "nvs_flash.h"
#include "freertos/FreeRTOSConfig.h"
/* BLE */
#include "nimble/nimble_port.h"
#include "nimble/nimble_port_freertos.h"
#include "host/ble_hs.h"
#include "host/util/util.h"
#include "console/console.h"
#include "services/gap/ble_svc_gap.h"
#include "ble_htp_prph.h"
#if CONFIG_EXAMPLE_EXTENDED_ADV
static uint8_t ext_adv_pattern_1[] = {
0x02, 0x01, 0x06,
0x03, 0x03, 0xab, 0xcd,
0x03, 0x03, 0x18, 0x09,
0x12, 0X09, 'n', 'i', 'm', 'b', 'l', 'e', '-', 'h', 't', 'p', '-', 'p', 'r', 'p', 'h', '-', 'e',
};
#endif
static const char *tag = "NimBLE_HTP_PRPH";
static TimerHandle_t ble_htp_prph_tx_timer;
static uint16_t conn_handle;
static const char *device_name = "ble_htp_prph";
static int ble_htp_prph_gap_event(struct ble_gap_event *event, void *arg);
static uint8_t ble_htp_prph_addr_type;
/**
* Utility function to log an array of bytes.
*/
void
print_bytes(const uint8_t *bytes, int len)
{
int i;
for (i = 0; i < len; i++) {
MODLOG_DFLT(INFO, "%s0x%02x", i != 0 ? ":" : "", bytes[i]);
}
}
void
print_addr(const void *addr)
{
const uint8_t *u8p;
u8p = addr;
MODLOG_DFLT(INFO, "%02x:%02x:%02x:%02x:%02x:%02x",
u8p[5], u8p[4], u8p[3], u8p[2], u8p[1], u8p[0]);
}
#if CONFIG_EXAMPLE_EXTENDED_ADV
/**
* Enables advertising with the following parameters:
* o General discoverable mode.
* o Undirected connectable mode.
*/
static void
ext_ble_htp_prph_advertise(void)
{
struct ble_gap_ext_adv_params params;
struct os_mbuf *data;
uint8_t instance = 0;
int rc;
/* First check if any instance is already active */
if (ble_gap_ext_adv_active(instance)) {
return;
}
/* use defaults for non-set params */
memset (¶ms, 0, sizeof(params));
/* enable connectable advertising */
params.connectable = 1;
/* advertise using random addr */
params.own_addr_type = BLE_OWN_ADDR_PUBLIC;
params.primary_phy = BLE_HCI_LE_PHY_1M;
params.secondary_phy = BLE_HCI_LE_PHY_2M;
params.sid = 1;
params.itvl_min = BLE_GAP_ADV_FAST_INTERVAL1_MIN;
params.itvl_max = BLE_GAP_ADV_FAST_INTERVAL1_MIN;
/* configure instance 0 */
rc = ble_gap_ext_adv_configure(instance, ¶ms, NULL,
ble_htp_prph_gap_event, NULL);
assert (rc == 0);
/* in this case only scan response is allowed */
/* get mbuf for scan rsp data */
data = os_msys_get_pkthdr(sizeof(ext_adv_pattern_1), 0);
assert(data);
/* fill mbuf with scan rsp data */
rc = os_mbuf_append(data, ext_adv_pattern_1, sizeof(ext_adv_pattern_1));
assert(rc == 0);
rc = ble_gap_ext_adv_set_data(instance, data);
assert (rc == 0);
/* start advertising */
rc = ble_gap_ext_adv_start(instance, 0, 0);
assert (rc == 0);
}
#else
static void
ble_htp_prph_advertise(void)
{
struct ble_gap_adv_params adv_params;
struct ble_hs_adv_fields fields;
int rc;
/*
* Set the advertisement data included in our advertisements:
* o Flags (indicates advertisement type and other general info)
* o Advertising tx power
* o Device name
*/
memset(&fields, 0, sizeof(fields));
/*
* Advertise two flags:
* o Discoverability in forthcoming advertisement (general)
* o BLE-only (BR/EDR unsupported)
*/
fields.flags = BLE_HS_ADV_F_DISC_GEN |
BLE_HS_ADV_F_BREDR_UNSUP;
/*
* Indicate that the TX power level field should be included; have the
* stack fill this value automatically. This is done by assigning the
* special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
*/
fields.tx_pwr_lvl_is_present = 1;
fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
fields.name = (uint8_t *)device_name;
fields.name_len = strlen(device_name);
fields.name_is_complete = 1;
fields.uuids16 = (ble_uuid16_t[]) {
BLE_UUID16_INIT(BLE_SVC_HTP_UUID16)
};
fields.num_uuids16 = 1;
fields.uuids16_is_complete = 1;
rc = ble_gap_adv_set_fields(&fields);
if (rc != 0) {
MODLOG_DFLT(ERROR, "error setting advertisement data; rc=%d\n", rc);
return;
}
/* Begin advertising */
memset(&adv_params, 0, sizeof(adv_params));
adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
rc = ble_gap_adv_start(ble_htp_prph_addr_type, NULL, BLE_HS_FOREVER,
&adv_params, ble_htp_prph_gap_event, NULL);
if (rc != 0) {
MODLOG_DFLT(ERROR, "error enabling advertisement; rc=%d\n", rc);
return;
}
}
#endif
static void
ble_htp_prph_tx_htp_stop(void)
{
xTimerStop( ble_htp_prph_tx_timer, 1000 / portTICK_PERIOD_MS );
}
/* Reset temperature measurement */
static void
ble_htp_prph_tx_htp_reset(void)
{
int rc;
if (xTimerReset(ble_htp_prph_tx_timer, 1000 / portTICK_PERIOD_MS ) == pdPASS) {
rc = 0;
} else {
rc = 1;
}
assert(rc == 0);
}
/* This function notifies intermediate temperature to the client */
static void
ble_htp_prph_tx(TimerHandle_t ev)
{
int rc;
float temp;
/* If temperature value to be indicated is in Fahrenheit set temp_unit as true or else false
for Celsius */
bool temp_unit = true;
if (!ble_svc_htp_is_subscribed(conn_handle, INTERMEDIATE_TEMP)) {
ble_htp_prph_tx_htp_stop();
printf("\nreturn");
return;
}
temp = 0; /* 0 Fahrenheit */
rc = ble_svc_htp_notify(conn_handle, temp, temp_unit);
if (rc == 0) {
MODLOG_DFLT(INFO, "Notification sent successfully");
} else {
MODLOG_DFLT(INFO, "Error in sending notification");
}
ble_htp_prph_tx_htp_reset();
}
static int
ble_htp_prph_gap_event(struct ble_gap_event *event, void *arg)
{
switch (event->type) {
case BLE_GAP_EVENT_LINK_ESTAB:
/* A new connection was established or a connection attempt failed */
MODLOG_DFLT(INFO, "connection %s; status=%d\n",
event->link_estab.status == 0 ? "established" : "failed",
event->link_estab.status);
if (event->link_estab.status != 0) {
/* Connection failed; resume advertising */
#if CONFIG_EXAMPLE_EXTENDED_ADV
ext_ble_htp_prph_advertise();
#else
ble_htp_prph_advertise();
#endif
}
conn_handle = event->link_estab.conn_handle;
break;
case BLE_GAP_EVENT_DISCONNECT:
MODLOG_DFLT(INFO, "disconnect; reason=%d\n", event->disconnect.reason);
/* Connection terminated; resume advertising */
#if CONFIG_EXAMPLE_EXTENDED_ADV
ext_ble_htp_prph_advertise();
#else
ble_htp_prph_advertise();
#endif
ble_htp_prph_tx_htp_stop();
ble_svc_htp_on_disconnect(event->disconnect.conn.conn_handle);
break;
case BLE_GAP_EVENT_ADV_COMPLETE:
MODLOG_DFLT(INFO, "adv complete\n");
#if CONFIG_EXAMPLE_EXTENDED_ADV
ext_ble_htp_prph_advertise();
#else
ble_htp_prph_advertise();
#endif
break;
case BLE_GAP_EVENT_SUBSCRIBE:
MODLOG_DFLT(INFO, "subscribe event; cur_notify=%d\n value handle; "
"val_handle=%d\n",
event->subscribe.cur_notify, event->subscribe.attr_handle);
ble_svc_htp_subscribe(event->subscribe.conn_handle, event->subscribe.attr_handle);
if (event->subscribe.cur_notify) {
ble_htp_prph_tx_htp_reset();
}
ESP_LOGI("BLE_GAP_SUBSCRIBE_EVENT", "conn_handle from subscribe=%d", conn_handle);
break;
case BLE_GAP_EVENT_MTU:
MODLOG_DFLT(INFO, "mtu update event; conn_handle=%d mtu=%d\n",
event->mtu.conn_handle,
event->mtu.value);
break;
}
return 0;
}
static void
ble_htp_prph_on_sync(void)
{
int rc;
rc = ble_hs_id_infer_auto(0, &ble_htp_prph_addr_type);
assert(rc == 0);
uint8_t addr_val[6] = {0};
rc = ble_hs_id_copy_addr(ble_htp_prph_addr_type, addr_val, NULL);
MODLOG_DFLT(INFO, "Device Address: ");
print_addr(addr_val);
MODLOG_DFLT(INFO, "\n");
/* Begin advertising */
#if CONFIG_EXAMPLE_EXTENDED_ADV
ext_ble_htp_prph_advertise();
#else
ble_htp_prph_advertise();
#endif
}
static void
ble_htp_prph_on_reset(int reason)
{
MODLOG_DFLT(ERROR, "Resetting state; reason=%d\n", reason);
}
void ble_htp_prph_host_task(void *param)
{
ESP_LOGI(tag, "BLE Host Task Started");
/* This function will return only when nimble_port_stop() is executed */
nimble_port_run();
nimble_port_freertos_deinit();
}
void app_main(void)
{
int rc;
/* Initialize NVS — it is used to store PHY calibration data */
esp_err_t ret = nvs_flash_init();
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
ESP_ERROR_CHECK(nvs_flash_erase());
ret = nvs_flash_init();
}
ESP_ERROR_CHECK(ret);
ret = nimble_port_init();
if (ret != ESP_OK) {
MODLOG_DFLT(ERROR, "Failed to init nimble %d \n", ret);
return;
}
/* Initialize the NimBLE host configuration */
ble_hs_cfg.sync_cb = ble_htp_prph_on_sync;
ble_hs_cfg.reset_cb = ble_htp_prph_on_reset;
/* Enable bonding */
ble_hs_cfg.sm_bonding = 1;
ble_hs_cfg.sm_our_key_dist |= BLE_SM_PAIR_KEY_DIST_ENC | BLE_SM_PAIR_KEY_DIST_ID;
ble_hs_cfg.sm_their_key_dist |= BLE_SM_PAIR_KEY_DIST_ENC | BLE_SM_PAIR_KEY_DIST_ID;
ble_hs_cfg.sm_sc = 1;
ble_hs_cfg.sm_mitm = 1;
/* name, period/time, auto reload, timer ID, callback */
ble_htp_prph_tx_timer = xTimerCreate("ble_htp_prph_tx_timer", pdMS_TO_TICKS(1000), pdTRUE,
(void *)0, ble_htp_prph_tx);
rc = gatt_svr_init();
assert(rc == 0);
/* Set the default device name */
rc = ble_svc_gap_device_name_set(device_name);
assert(rc == 0);
/* Start the task */
nimble_port_freertos_init(ble_htp_prph_host_task);
}
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