change device name through BLE

  1. Build a custom BLE service and enable the write attribute

  2. Configure the characteristic "attr_char_value.max_len = MAX_LEN"; max_len should be larger than your device name

  3. In the BLE event handler, read back the data like below

     if ((write_evt->handle == m_custom_service_char.value_handle) && (write_evt->data[0] == RENAME))
     {
     				//device name limited to 10bytes
     				for (uint8_t i = 0; i < MAX_DEVICE_NAME_LEN; i++){
     					device_name[i] = write_evt->data[i+1];
     				}
    
     				ble_gap_conn_sec_mode_t sec_mode;
     				BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
     				err_code = sd_ble_gap_device_name_set(&sec_mode,(const uint8_t *)device_name,MAX_DEVICE_NAME_LEN);
     				APP_ERROR_CHECK(err_code);
     }
    
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