BtDis.c

// GATT Device Information Service
// Copyright 2020 MZachmann
// MIT License

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/conn.h>
#include <bluetooth/uuid.h>
#include <bluetooth/gatt.h>

#include <logging/log.h>
LOG_MODULE_REGISTER(BtDis, LOG_LEVEL_INF);

#define BT_GATT_DIS_MODEL		    "BlueLora"
#define BT_GATT_DIS_MANUF		    "Audua, LLC"
// following defines are paired as enable, value
#define CONFIG_BT_GATT_DIS_SERIAL_NUMBER
#define BT_GATT_DIS_SERIAL_NUMBER_STR   "10012"
#define CONFIG_BT_GATT_DIS_FW_REV
#define BT_GATT_DIS_FW_REV_STR	    "1.58"
#define CONFIG_BT_GATT_DIS_HW_REV
#define BT_GATT_DIS_HW_REV_STR	    "8"
// #define CONFIG_BT_GATT_DIS_SW_REV
#define BT_GATT_DIS_SW_REV_STR	    "1.5"

static ssize_t read_str(struct bt_conn *conn,
			  const struct bt_gatt_attr *attr, void *buf,
			  u16_t len, u16_t offset)
{
	return bt_gatt_attr_read(conn, attr, buf, len, offset, attr->user_data,
				 strlen(attr->user_data));
}

/* Device Information Service Declaration */
BT_GATT_SERVICE_DEFINE(dis_svc,
	BT_GATT_PRIMARY_SERVICE(BT_UUID_DIS),
	BT_GATT_CHARACTERISTIC(BT_UUID_DIS_MODEL_NUMBER,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL, BT_GATT_DIS_MODEL),
	BT_GATT_CHARACTERISTIC(BT_UUID_DIS_MANUFACTURER_NAME,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL, BT_GATT_DIS_MANUF)

#if defined(CONFIG_BT_GATT_DIS_SERIAL_NUMBER)
	,BT_GATT_CHARACTERISTIC(BT_UUID_DIS_SERIAL_NUMBER,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL,
			       BT_GATT_DIS_SERIAL_NUMBER_STR)
#endif
#if defined(CONFIG_BT_GATT_DIS_FW_REV)
	,BT_GATT_CHARACTERISTIC(BT_UUID_DIS_FIRMWARE_REVISION,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL, BT_GATT_DIS_FW_REV_STR)
#endif
#if defined(CONFIG_BT_GATT_DIS_HW_REV)
	,BT_GATT_CHARACTERISTIC(BT_UUID_DIS_HARDWARE_REVISION,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL, BT_GATT_DIS_HW_REV_STR)
#endif
#if defined(CONFIG_BT_GATT_DIS_SW_REV)
	,BT_GATT_CHARACTERISTIC(BT_UUID_DIS_SOFTWARE_REVISION,
			       BT_GATT_CHRC_READ, BT_GATT_PERM_READ,
			       read_str, NULL, BT_GATT_DIS_SW_REV_STR)
#endif
	);