Introduction

GRSmart is a debugging tool for GR551x BLE Dongle (hereinafter referred to as Dongle) on PCs.

Supported by GRSmart, a Dongle can:

• Start advertising as a slave, or
• Scan and connect to other devices as a master.

When Dongles are connected, GRSmart can test and debug the Bluetooth Low Energy (Bluetooth LE) characteristics of other Bluetooth devices.

Main features of GRSmart:

• Dongle as a slave:
  • Start legacy advertising, extended advertising, and periodic advertising.
  • Start up to five advertisements simultaneously.
• Dongle as a master:
  • Scan advertisements.
  • Connect to or disconnect from other devices, and support multiple connections between two devices.
  • Synchronize periodic advertising.
  • Manage whitelists of devices, lists of bonded devices, lists of periodic advertisements, and lists of resolvable private addresses (RPAs).
  • View advertising data, scan response data, and periodic advertising data.
• Support GATT-related operations.
  • Access the GATT attribute tables, which can be viewed in category mode or in simple mode.
  • Export the attribute tables in .csv files.
  • Read all characteristic values in the attribute tables with one click.
  • Turn on/off notifications/indications.
  • Support three pairing methods: Just Works, Passkey Entry, and Numeric Comparison.
  • Support maximum transmission unit (MTU) negotiations.
  • Discover services, characteristics, and attributes.
  • Read or write GATT characteristic values and descriptors.
• Support GAP-related operations.
  • Update connection parameters, physical layer (PHY) parameters, and parameters for data transmission.
  • Obtain information about the peer devices, including the supported versions and characteristics, PHY settings for connection, and channel maps.
  • Set radio frequency (RF) transmission power.
• Support L2CAP-related operations.
  • Create connection-oriented channels (COCs). More than one COC can be created.
  • Transmit and receive data through COCs.
  • Manage credits.
  • Manage and configure parameters related to scanning, connection, security, and L2CAP in a unified manner.
  • View and export Tool logs and Dongle logs.
  • Obtain RPAs.
  • Calibrate RF offsets.

Figure 1 shows the Graphical User Interface (GUI) of GRSmart.