• State Verified Answer
  • Locked Locked
  • Replies 2 replies
  • Subscribers 71 subscribers
  • Views 1752 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 114339
Options
This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

nrf Master control and read characteristic

Yacire

Hi all,

I have a quesion about reading a value's characteristic in the Android app nrf Master control panel. I read a value, and i have the good value but i have a letter in quotes at the right of the value like this (this is the last characteristic; we have 0x64 (which is equal to 100 in decimal, it is the good value, but we have the letter "d" and i don't understand why ?):

image description

My characteristic is defined like this:

static uint32_t battery_char_add(ble_lbs_t * p_lbs, const ble_lbs_init_t * p_lbs_init)
{
    ble_gatts_char_md_t char_md;
    ble_gatts_attr_t    attr_char_value;
    ble_uuid_t          ble_uuid;
    ble_gatts_attr_md_t attr_md;

    memset(&char_md, 0, sizeof(char_md));

    char_md.char_props.read   = 1;
    char_md.char_props.write  = 0;
    char_md.p_char_user_desc  = NULL;
    char_md.p_char_pf         = NULL;
    char_md.p_user_desc_md    = NULL;
    char_md.p_cccd_md         = NULL;
    char_md.p_sccd_md         = NULL;

    ble_uuid.type = p_lbs->uuid_type;
    ble_uuid.uuid = LBS_UUID_BATTERY_CHAR;
    
    memset(&attr_md, 0, sizeof(attr_md));

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
    attr_md.vloc       = BLE_GATTS_VLOC_STACK;
    attr_md.rd_auth    = 0;
    attr_md.wr_auth    = 0;
    attr_md.vlen       = 0;
    
    memset(&attr_char_value, 0, sizeof(attr_char_value));

    attr_char_value.p_uuid       = &ble_uuid;
    attr_char_value.p_attr_md    = &attr_md;
    attr_char_value.init_len     = sizeof(uint8_t);
    attr_char_value.init_offs    = 0;
    attr_char_value.max_len      = sizeof(uint8_t);
    attr_char_value.p_value      = (uint8_t*) &initialValueBattery;

    return sd_ble_gatts_characteristic_add(p_lbs->service_handle,
                                           &char_md,
                                           &attr_char_value,
                                           &p_lbs->battery_char_handles);
}

Any help would be appeciated, Thanks.

Related
Terms of service