S42/Central Software User Guide
1VV0301318 Rev. 3
– 2018-08-31
Reproduction forbidden without written authorization from Telit Communications S.p.A.- All Rights Reserved.
Page 5 of 66
Contents
1.
Introduction ................................................................................................................... 7
1.1.
Scope ....................................................................................................................... 7
1.2.
Audience .................................................................................................................. 7
1.3.
Contact Information, Support ................................................................................... 7
1.4.
Text Conventions ..................................................................................................... 8
1.5.
Related Documents .................................................................................................. 8
2.
Introduction ................................................................................................................... 9
2.1.
Overview .................................................................................................................. 9
2.2.
Feature Set .............................................................................................................. 9
3.
Modes and Connections ............................................................................................ 10
3.1.
AT Command Mode ............................................................................................... 10
3.1.1.
Central Role as GATT Client ...................................................................................... 10
3.1.2.
Peripheral Role as Terminal I/O Server...................................................................... 18
3.1.3.
Multiple GATT Connections ....................................................................................... 21
3.2.
MUX Mode ............................................................................................................. 23
3.2.1.
Central Role as GATT Client ...................................................................................... 23
4.
Startup Timing ............................................................................................................ 32
4.1.
Firmware Version 3.002 ......................................................................................... 32
5.
Security ....................................................................................................................... 33
5.1.
Pairable and Bondable Mode ................................................................................. 33
5.2.
LE Secure Connections ......................................................................................... 33
5.3.
Security Levels for Terminal I/O ............................................................................. 34
5.4.
Connection Example Terminal I/O “Just Works” .................................................... 38
5.5.
Connection Example Terminal I/O “Passkey Entry” ............................................... 39
6.
UART Interface Control Protocol (UICP) ................................................................... 40
6.1.
General Protocol Description ................................................................................. 40
6.2.
Requirements of Using UICP on S42/Central ........................................ 40
6.3.
Connection Example between S42/Central and Host Controller ............ 40
6.4.
UICP Protocol States ............................................................................................. 41
6.4.1.
Drive from "interface up" to "interface down" State ..................................................... 42
