| /** @file |
| * @brief HTS Service sample |
| */ |
| |
| /* |
| * Copyright (c) 2019 Aaron Tsui <aaron.tsui@outlook.com> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/types.h> |
| #include <stddef.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <misc/printk.h> |
| #include <misc/byteorder.h> |
| #include <zephyr.h> |
| |
| #include <bluetooth/bluetooth.h> |
| #include <bluetooth/hci.h> |
| #include <bluetooth/conn.h> |
| #include <bluetooth/uuid.h> |
| #include <bluetooth/gatt.h> |
| |
| static u8_t simulate_htm; |
| static u8_t indicating; |
| static struct bt_gatt_indicate_params ind_params; |
| |
| static u8_t temperature = 20U; |
| |
| static void htmc_ccc_cfg_changed(const struct bt_gatt_attr *attr, |
| u16_t value) |
| { |
| simulate_htm = (value == BT_GATT_CCC_INDICATE) ? 1 : 0; |
| } |
| |
| static void indicate_cb(struct bt_conn *conn, const struct bt_gatt_attr *attr, |
| u8_t err) |
| { |
| printk("Indication %s\n", err != 0U ? "fail" : "success"); |
| indicating = 0U; |
| } |
| |
| /* Heart Rate Service Declaration */ |
| BT_GATT_SERVICE_DEFINE(hts_svc, |
| BT_GATT_PRIMARY_SERVICE(BT_UUID_HTS), |
| BT_GATT_CHARACTERISTIC(BT_UUID_HTS_MEASUREMENT, BT_GATT_CHRC_INDICATE, |
| BT_GATT_PERM_NONE, NULL, NULL, NULL), |
| BT_GATT_CCC(htmc_ccc_cfg_changed, |
| BT_GATT_PERM_READ | BT_GATT_PERM_WRITE), |
| /* more optional Characteristics */ |
| ); |
| |
| void hts_init(void) |
| { |
| } |
| |
| void hts_indicate(void) |
| { |
| /* Temperature measurements simulation */ |
| if (simulate_htm) { |
| if (indicating) { |
| return; |
| } |
| |
| temperature++; |
| if (temperature == 30U) { |
| temperature = 20U; |
| } |
| |
| static u8_t htm[1 + 4]; |
| htm[0] = 0x0; /* uint8, temperature in celsius*/ |
| /* (IEEE-11073 32-bit FLOAT). */ |
| htm[1] = temperature; /* mantissa = temperature*/ |
| htm[2] = htm[3] = htm[4] = 0; /* sign = 0, exponent= 0 */ |
| |
| ind_params.attr = &hts_svc.attrs[2]; |
| ind_params.func = indicate_cb; |
| ind_params.data = &htm; |
| ind_params.len = sizeof(htm); |
| |
| if (bt_gatt_indicate(NULL, &ind_params) == 0) { |
| indicating = 1U; |
| } |
| } |
| } |