Texas Instruments DLP NIRscan, User Manual, Page: 42 / 73

GATT Scan Configuration
Service enumerated?
Read
Number of
Stored
Configurations
Yes
Subscribe to
Return Stored
Configurations
List
notification
DLP NIRscan
Nano returns the
number of stored
scan
configurations
Write to
Request Stored
Configuration
List
Subscribe to
Return Scan
Configuration
Data
notification
DLP NIRscan
Nano returns
stored
configurations
Write scan
configuration ID
to
Return Scan
Configuration
Data
Deserialize data
using DLP Spectrum
Library
dlpspec_deserialize
DLP NIRscan
Nano returns
requested scan
configuration in
serialized data
format
No
Read all stored scan
configurations?
Write to
Active Scan
Configuration
t o set an active
configuration for
future scans
Yes
No
Bluetooth Client App Workflow
www.ti.com
5.3.2.4 Bluetooth Client GATT Scan Configuration Service
Once the GATT Scan Configuration Service is enumerated, the Bluetooth Client can prompt DLP NIRscan
Nano to download stored scan configurations. These parameters must to be downloaded whenever a new
DLP NIRscan Nano is connected to a Bluetooth Client and before a scan is initiated. To read the stored
scan configuration, the Bluetooth Client must perform the following steps:
• Read the number of stored configurations.
• Subscribe to the notification of the characteristic that returns stored configuration list.
• Issue a request for stored configuration list and wait for the notification to read the stored configuration
list.
• Subscribe to the notification of the characteristic that returns scan configuration data.
• Read each scan configuration data by writing the scan configuration ID to the characteristic that
returns the scan configuration data, wait for the notification, and then read the serialized scan
configuration data returned. The DLP Spectrum Library provides a routine to interpret this serialized
data:
dlpspec_deserialize . Repeat this step for each stored scan configuration.
• Set the active scan configuration by writing to the scan configuration ID to the active scan configuration
characteristic.
Figure 5-10 depicts the workflow for this service.
Figure 5-10. GATT Scan Configuration Service Workflow
5.3.2.5 Bluetooth Client GATT Scan Data Service
Once the GATT Scan Data Service is enumerated, the Bluetooth Client can prompt DLP NIRscan Nano to
download stored scan data or perform a scan. To read the stored scan data, the Bluetooth Client must
perform the following steps:
• Read the number of stored scans.
• Subscribe to the notification of the characteristic that returns stored scan indices list.
• Issue a request to read stored configuration list, wait for the notification to read the stored configuration
list.
42 DLP NIRscan Nano Software DLPU030B – June 2015 – Revised July 2015
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