WAGO 750-921 User manual

Manual

WAGO-I/O-SYSTEM 750

Bluetooth

®

Adapter

750-921

Accessories

Version 2.0.1, applicable from FW Version 02

2 WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27

D-32423 Minden

Phone: +49 (0) 571/8 87 – 0

Fax: +49 (0) 571/8 87 – 1 69

E-Mail: [email protected]

Web: http://www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 5 55

Fax: +49 (0) 571/8 87 – 85 55

E-Mail: [email protected]

Every conceivable measure has been taken to ensure the accuracy and

completeness of this documentation. However, as errors can never be fully

excluded, we always appreciate any information or suggestions for improving the

documentation.

E-Mail: [email protected]

We wish to point out that the software and hardware terms as well as the

trademarks of companies used and/or mentioned in the present manual are

generally protected by trademark or patent.

WAGO-I/O-SYSTEM 750 Table of Contents 3

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

Table of Contents

1 Notes about this Documentation ................................................................. 6

1.1 Validity of this Documentation ................................................................. 6

1.2 Copyright ................................................................................................... 6

1.3 Symbols ..................................................................................................... 7

1.4 Number Notation ....................................................................................... 9

1.5 Font Conventions ...................................................................................... 9

2 Important Notes ......................................................................................... 10

2.1 Legal Bases ............................................................................................. 10

2.1.1 Subject to Changes ............................................................................. 10

2.1.2 Personnel Qualifications ..................................................................... 10

2.1.3 Use of the 750 Series in Compliance with Underlying Provisions .... 10

2.1.4 Technical Condition of Specified Devices ......................................... 10

2.2 Safety Advice (Precautions) .................................................................... 11

3 Device Description ..................................................................................... 13

3.1 View ........................................................................................................ 14

3.2 Display Elements .................................................................................... 15

3.3 Technical Data ........................................................................................ 16

3.3.1 Device ................................................................................................. 16

3.3.2 Bluetooth

®

Communication ................................................................ 16

3.4 Approvals ................................................................................................ 17

4 Function Description ................................................................................. 18

4.1 Radio Interface ........................................................................................ 19

4.1.1 SPP Service “DATA” ......................................................................... 19

4.1.2 SPP Service “CONFIG” ..................................................................... 20

4.2 AT Command Interface ........................................................................... 20

4.3 Factory Settings ....................................................................................... 22

4.4 Operating Modes ..................................................................................... 23

4.5 Security Settings for the Radio Communications Interface .................... 24

4.5.1 Visibility and Connectivity................................................................. 24

4.5.2 Encryption .......................................................................................... 25

4.5.3 Authentication .................................................................................... 25

4.6 Special Coexistence Properties ............................................................... 28

5 Connect Devices ......................................................................................... 30

5.1 Plug in WSA ........................................................................................... 30

5.2 Unplug WSA ........................................................................................... 31

6 Configuration ............................................................................................. 32

6.1 AT Command Interface ........................................................................... 32

6.1.1 Using the AT Command Interface ..................................................... 32

6.1.2 Opening the Command Interface........................................................ 33

6.1.3 Basic Structure of an AT Command .................................................. 34

6.1.4 Basic Structure of Replies to AT Commands..................................... 34

6.1.5 Effectiveness of AT Commands ......................................................... 35

7 Commissioning ........................................................................................... 37

4 Table of Contents WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

7.1 Set Up Bluetooth

®

Connection ................................................................ 37

7.1.1 Example: Connect PC to a WSA ........................................................ 37

7.1.2 Example: Set up a Connection between 2 WSAs ............................... 43

7.2 Use Established Connection on the PC ................................................... 43

7.2.1 Example: Set up a Configuration Connection using HTerm .............. 43

7.2.2 Example: Set Up a Data Connection Using WAGO-I/O-CHECK ..... 45

7.3 Example: Establish a Connection between 2 WSAs ............................... 46

8 Reference AT Commands ......................................................................... 47

8.1 AT ........................................................................................................... 47

8.2 Group “AT BTID”: Identifiers ................................................................ 47

8.2.1 AT BTID ? .......................................................................................... 47

8.2.2 AT BTID ADR ? ................................................................................ 47

8.2.3 AT BTID COD ................................................................................... 47

8.2.4 AT BTID HELP ................................................................................. 48

8.2.5 AT BTID NAME ................................................................................ 48

8.3 Group “AT BTSEC”: Security ................................................................ 49

8.3.1 AT BTSEC ADEV ............................................................................. 49

8.3.1.1 AT BTSEC ADEV ADD = <Device> ........................................... 49

8.3.1.2 AT BTSEC ADEV DEL = <Index> .............................................. 50

8.3.1.3 AT BTSEC ADEV CLEAR .......................................................... 50

8.3.2 AT BTSEC AUTH ............................................................................. 50

8.3.3 AT BTSEC HELP .............................................................................. 50

8.3.4 AT BTSEC INQ ................................................................................. 51

8.3.5 AT BTSEC PAG ................................................................................ 51

8.3.6 AT BTSEC PIN .................................................................................. 51

8.3.7 Subgroup “AT BTSEC TRUSTED" .................................................. 52

8.3.7.1 AT BTSEC TRUSTED ? ............................................................... 52

8.3.7.2 AT BTSEC TRUSTED DEL = <Index> ....................................... 52

8.3.7.3 AT BTSEC TRUSTED CLEAR ................................................... 52

8.4 Group “AT CON”: Configuration of Outbound Connections ................ 52

8.4.1 AT CON AUTO ................................................................................. 52

8.4.2 AT CON CLOSE ................................................................................ 53

8.4.3 AT CON HELP .................................................................................. 53

8.4.4 AT CON OPEN .................................................................................. 53

8.4.5 Subgroup “AT CON RETRY” ........................................................... 53

8.4.5.1 AT CON RETRY = <Reconnect Cycle> ...................................... 53

8.4.5.2 AT CON RETRY ? ........................................................................ 53

8.4.5.3 AT CON RETRY CYCLE ............................................................ 53

8.4.5.4 AT CON RETRY ENA ................................................................. 54

8.4.6 AT CON TAR .................................................................................... 54

8.4.6.1 AT CON TAR ADR ...................................................................... 54

8.4.6.2 AT CON TAR CLEAR ................................................................. 55

8.4.6.3 AT CON TAR PIN ........................................................................ 55

8.4.6.4 AT CON TAR PORT .................................................................... 55

8.5 Group “AT ECO”: Coexistence Settings ................................................ 55

8.5.1 Subgroup “AT ECO BLK” ................................................................. 55

8.5.1.1 AT ECO BLK ................................................................................ 55

8.5.1.2 AT ECO BLK 15.4 = <Channels> ................................................ 56

8.5.1.3 AT ECO BLK BT <Channels> ..................................................... 56

8.5.1.4 AT ECO BLK WIFI = <Channels> ............................................... 56

WAGO-I/O-SYSTEM 750 Table of Contents 5

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

8.5.1.5 AT ECO BLK CLEAR .................................................................. 56

8.5.2 AT ECO ENA..................................................................................... 56

8.5.3 AT ECO HELP ................................................................................... 57

8.5.4 AT ECO INQ ...................................................................................... 57

8.5.5 AT ECO TXPWR ? ............................................................................ 57

8.5.5.1 AT ECO TXPWR DEF ................................................................. 57

8.5.5.2 AT ECO TXPWR MAX ................................................................ 57

8.6 AT HELP ................................................................................................ 58

8.7 AT INFO ................................................................................................. 58

8.8 Group “AT INQ”: Search for SPP Devices within Range ...................... 58

8.8.1 AT INQ ............................................................................................... 58

8.8.2 AT INQ COD ..................................................................................... 59

8.8.3 AT INQ COUNT ................................................................................ 59

8.8.4 AT INQ START ................................................................................. 59

8.9 AT LOGOUT .......................................................................................... 59

8.10 AT RESET .............................................................................................. 60

8.11 Group “AT RDEV": Devices within Range ........................................... 60

8.11.1 AT RDEV FOUND ? ......................................................................... 60

8.11.2 AT RDEV FOUND NAMES ? .......................................................... 60

8.11.3 AT RDEV HELP ................................................................................ 60

8.11.4 AT RDEV NAME <Device> ............................................................. 60

8.11.5 Subgroup “AT RDEV PORT”............................................................ 61

8.11.5.1 AT RDEV PORT INDEX <Target Device> ................................. 61

8.11.5.2 AT RDEV PORT NAME <Device> ............................................. 61

8.12 Group “AT STATUS”: Version and Status Information ........................ 61

8.12.1 AT STATUS CON ? .......................................................................... 61

8.12.2 AT STATUS HWVERS ? .................................................................. 62

8.12.3 AT STATUS SERIAL ? ..................................................................... 62

8.12.4 AT STATUS STATS ? ....................................................................... 62

8.12.5 AT STATUS SWVERS ? ................................................................... 63

8.12.6 AT STATUS UPTIME ? .................................................................... 63

8.13 Group “AT SYS”: Output Format, Factory Default Settings ................. 63

8.13.1 AT SYS CFG CLEAR........................................................................ 63

8.13.2 AT SYS ECHO................................................................................... 63

8.13.3 AT SYS HELP ................................................................................... 64

8.13.4 AT SYS OUTPUT .............................................................................. 64

8.13.5 AT SYS USRSTR .............................................................................. 64

8.14 Group “AT UART": Serial Interface Parameters.................................... 65

8.14.1 AT UART ........................................................................................... 65

8.14.2 AT UART BAUD............................................................................... 65

8.14.3 AT UART HELP ................................................................................ 65

8.14.4 AT UART PAR .................................................................................. 65

8.14.5 AT UART STOPB ............................................................................. 66

Glossary ................................................................................................................ 67

List of Figures ...................................................................................................... 72

List of Tables ........................................................................................................ 73

6 Notes about this Documentation WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

1 Notes about this Documentation

Keep this documentation!

The operating instructions are part of the product and shall be kept for the entire

lifetime of the product. They shall be transferred to each subsequent user of the

product. Care must also be taken to ensure that any supplement to these

instructions are included, if applicable.

1.1 Validity of this Documentation

This documentation is only applicable to the accessory 750-921 Bluetooth

®

Adapter for the WAGO-I/O-SYSTEM 750 series.

This documentation is only applicable from FW Version 02.

This documentation applies to firmware version 02 and higher!

This documentation applies to Bluetooth

®

Adapter 750-921 firmware version 02

and higher. If you are using an older version of the Bluetooth

®

Adapter, please

contact WAGO Support.

The product Bluetooth

®

Adapter 750-921 shall only be installed and operated

according to the instructions in this manual and the system description for the

WAGO-I/O-SYSTEM 750.

Consider power layout of the WAGO-I/O-SYSTEM 750!

In addition to these operating instructions, you will also need the system

description for the WAGO-I/O-SYSTEM 750, which can be downloaded at

www.wago.com. There, you can obtain important information including

information on electrical isolation, system power and supply specifications.

1.2 Copyright

This Manual, including all figures and illustrations, is copyright-protected. Any

further use of this Manual by third parties that violate pertinent copyright

provisions is prohibited. Reproduction, translation, electronic and phototechnical

filing/archiving (e.g., photocopying) as well as any amendments require the

written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.

Non-observance will involve the right to assert damage claims.

WAGO-I/O-SYSTEM 750 Notes about this Documentation 7

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

1.3 Symbols

Personal Injury!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

Personal Injury Caused by Electric Current!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

Personal Injury!

Indicates a moderate-risk, potentially hazardous situation which, if not avoided,

could result in death or serious injury.

Personal Injury!

Indicates a low-risk, potentially hazardous situation which, if not avoided, may

result in minor or moderate injury.

Damage to Property!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

Damage to Property Caused by Electrostatic Discharge (ESD)!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

Important Note!

Indicates a potential malfunction which, if not avoided, however, will not result in

damage to property.

8 Notes about this Documentation WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

Additional Information:

Refers to additional information which is not an integral part of this

documentation (e.g., the Internet).

WAGO-I/O-SYSTEM 750 Notes about this Documentation 9

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

1.4 Number Notation

Table 1: Number Notation

Number code

Example

Note

Decimal

100

Normal notation

Hexadecimal

0x64

C notation

Binary

'100'

'0110.0100'

In quotation marks, nibble separated with

dots (.)

1.5 Font Conventions

Table 2: Font Conventions

Font type

Indicates

italic

Names of paths and data files are marked in italic-type.

e.g.: C:\Programme\WAGO-I/O-CHECK

Menu

Menu items are marked in bold letters.

e.g.: Save

>

A greater-than sign between two names means the selection of a

menu item from a menu.

e.g.: File > New

Input

Designation of input or optional fields are marked in bold letters,

e.g.: Start of measurement range

“Value”

Input or selective values are marked in inverted commas.

e.g.: Enter the value “4 mA” under Start of measurement range.

[Button]

Pushbuttons in dialog boxes are marked with bold letters in square

brackets.

e.g.: [Input]

[Key]

Keys are marked with bold letters in square brackets.

e.g.: [F5]

10 Important Notes WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

2 Important Notes

This section includes an overall summary of the most important safety

requirements and notes that are mentioned in each individual section. To protect

your health and prevent damage to devices as well, it is imperative to read and

carefully follow the safety guidelines.

2.1 Legal Bases

2.1.1 Subject to Changes

WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any

alterations or modifications that serve to increase the efficiency of technical

progress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from

the granting of patents or from the legal protection of utility patents. Third-party

products are always mentioned without any reference to patent rights. Thus, the

existence of such rights cannot be excluded.

2.1.2 Personnel Qualifications

All sequences implemented on WAGO-I/O-SYSTEM 750 devices may only be

carried out by electrical specialists with sufficient knowledge in automation. The

specialists must be familiar with the current norms and guidelines for the devices

and automated environments.

All changes to the coupler or controller should always be carried out by qualified

personnel with sufficient skills in PLC programming.

2.1.3 Use of the 750 Series in Compliance with Underlying

Provisions

The component has been developed for use in an environment that meets the IP20

protection class criteria. Protection against finger injury and solid impurities up to

12.5 mm diameter is assured; protection against water damage is not ensured.

Unless otherwise specified, operation of the components in wet and dusty

environments is prohibited.

2.1.4 Technical Condition of Specified Devices

The devices to be supplied ex works are equipped with hardware and software

configurations, which meet the individual application requirements. WAGO

Kontakttechnik GmbH & Co. KG will be exempted from any liability in case of

changes in hardware or software as well as to non-compliant usage of devices.

Please send your request for modified and new hardware or software

configurations directly to WAGO Kontakttechnik GmbH & Co. KG.

WAGO-I/O-SYSTEM 750 Important Notes 11

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

2.2 Safety Advice (Precautions)

For installing and operating purposes of the relevant device to your system the

following safety precautions shall be observed:

Do not work on devices while energized!

All power sources to the device shall be switched off prior to performing any

installation, repair or maintenance work.

Installation only in appropriate housings, cabinets or in electrical operation

rooms!

The WAGO-I/O-SYSTEM 750 and its components are an open system. As such,

install the system and its components exclusively in appropriate housings,

cabinets or in electrical operation rooms. Allow access to such equipment and

fixtures to authorized, qualified staff only by means of specific keys or tools.

Replace defective or damaged devices!

Replace defective or damaged device/module (e.g., in the event of deformed

contacts), since the long-term functionality of device/module involved can no

longer be ensured.

Protect the components against materials having seeping and insulating

properties!

The components are not resistant to materials having seeping and insulating

properties such as: aerosols, silicones and triglycerides (found in some hand

creams). If you cannot exclude that such materials will appear in the component

environment, then install the components in an enclosure being resistant to the

above-mentioned materials. Clean tools and materials are imperative for handling

devices/modules.

Clean only with permitted materials!

Clean soiled contacts using oil-free compressed air or with ethyl alcohol and

leather cloths.

12 Important Notes WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

Do not use any contact spray!

Do not use any contact spray. The spray may impair contact area functionality in

connection with contamination.

Do not reverse the polarity of connection lines!

Avoid reverse polarity of data and power supply lines, as this may damage the

devices involved.

Avoid electrostatic discharge!

The devices are equipped with electronic components that may be destroyed by

electrostatic discharge when touched. Please observe the safety precautions

against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the

devices, please ensure that environmental factors (personnel, work space and

packaging) are properly grounded.

WAGO-I/O-SYSTEM 750 Device Description 13

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

3 Device Description

The Bluetooth

®

Adapter (750-921) is a serial Bluetooth

®

adapter. As a wireless

serial adapter (WSA), the device establishes a wireless connection between

WAGO-I/O-SYSTEM 750 Fieldbus Couplers/Programmable Logic Controllers

(PLCs) or 857 Series Transducers and external Bluetooth

®

devices (e.g., tablet

PCs, smartphones or standard PCs with a Bluetooth

®

interface).

As a cable replacement, the WSA simplifies communication with WAGO

software (WAGO-I/O-CHECK, WAGO-I/O-PRO, etc.).

The WSA is plugged into the service interface of the fieldbus coupler/WAGO

PLC or transducer for the entire configuration period. The WSA is powered by the

service interface, i.e., via the power supply of the fieldbus coupler/WAGO PLC or

transducer.

If required, the adapter may be configured via AT commands.

A blue LED indicates the WSA's operating and connection status.

A label with item and serial number is mounted on the back of the WSA.

14 Device Description WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

3.1 View

Figure 1: View

Table 3: Legend for the “View” Figure

Nr.

Description

1

Status LED

2

Label with item- and serial-number (backside)

3

Female connector for configuration interface

WAGO-I/O-SYSTEM 750 Device Description 15

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

3.2 Display Elements

Table 4: Display Element

LED

Status*

Description

Blue

Static OFF

No power supply, not ready for operation

Single flash, approx. 0.3 Hz

Ready for use, no existing wireless

connection

Rapid alternating flash,

approx. 4 Hz

Connect or device discovery

Static ON

Existing wireless connection and connection

to a (terminal) program established

Flicker

Data exchange

Single flash, approx. 1 Hz

Ready for use, no existing wireless

connection. Can switch modes.

Double flash, approx. 1 Hz

Selected “AutoConnect” operating mode is

prepared. Can switch modes.

Triple flash, approx. 1 Hz

Selected “Reset to factory settings”

operating mode is prepared. Can switch

modes.

Slow alternating flash,

approx. 0.5 Hz

“AutoConnect” operating mode enabled

*Key

Flash Types

LED Flashing Patterns

Single/double/triple flash

1/2/3 x short bright, long dim

Rapid/slow alternating flash

Bright, dark

Flicker

Short dim, otherwise bright

16 Device Description WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

3.3 Technical Data

3.3.1 Device

Table 5: Technical Data – Device

Dimensions (W x H x L) mm

15 x 50 x 19

Weight

Approx. 7 g

Connections

4-pin connection for the service interface for

WAGO fieldbus couplers and PLCs of the

WAGO-I/O-SYSTEM 750

Baud rates

9600, 19200, 38400, 57600, 115200

Configuration

AT commands (e.g. via HyperTerminal)

Indicators

Blue LED for operating connection status

Operating temperature

-20 °C ... 60 °C

Current consumption (internal)

Max. 60 mA

3.3.2 Bluetooth

®

Communication

Table 6: Technical Data – Bluetooth

®

Communication

Bluetooth

®

Version

2.1

Radio class / range of transmission

Class 2 / max. 20 m

Antenna

Integrated

RF output power

Max. +4 dBm

RF input sensitivity

Typ. -82 dBm

Frequency range

2.402 … 2.483 GHz (ISM band)

Type of communication

Point-to-point connection

Profiles supported

Serial Port Profile (SPP)

Coexistence properties

Adaptive Frequency Hopping (AFH)

Adaptive transmit power with configurable

upper limits for data exchange and device

discovery

Configurable channel blacklist for

“Frequency Hopping Spread Spectrum”

(FHSS)

Coexistence optimized device discovery

supported (media allocation < 5 %,

allocation duration < 100 ms)

Security

Bluetooth

®

security mode 4

“Secure Simple Pairing”

Encryption 128 bit

WAGO-I/O-SYSTEM 750 Device Description 17

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

3.4 Approvals

Conformity Marking

Bluetooth

®

FCC “Federal Communications Commission”

FCC ID: POOWML-C46

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and (2) this device must accept any interference

received, including interference that may cause undesired operation.

18 Function Description WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

4 Function Description

The WSA provides wireless access to the service interface of WAGO-I/O-

SYSTEM 750 fieldbus couplers and PLCs via Bluetooth

®

Serial Port Profile

(SPP). The SPP employs two communication services “CONFIG” and “DATA”,

which use the WSA as a configuration and data connection.

If the WSA is operated in conjunction with a 750 Series WAGO PLC, a

WAGO-I/O-PRO program saved on the PLC can establish a wireless connection

or query diagnostic information.

Figure 2: WSA applications

The WSA can be configured via an AT command interface. This AT command

interface can be used to define settings that enable a radio link to be set up by

external devices. You can also define via this AT command interface that the

WSA is to actively set up a radio link to an external device.

WAGO-I/O-SYSTEM 750 Function Description 19

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

The WSA can be used without previously being configured via the AT command

interface. For this, the WSA can be switched to other special operating modes by

targeted interruption of power supply at specific intervals. In these operating

modes, processes are initiated which adapt the configuration automatically as

required. This includes discovering a further WSA automatically within the

defined range and configuring and establishing a link. A detailed description of

this “AutoConnect” function is given in the section “Operating Modes.”

4.1 Radio Interface

Most of the functions of the WSA require that a radio link exist between it and

other devices in accordance with the Bluetooth

®

SPP standard.

Refer to the documentation for the external device concerned to learn how a radio

link to the WSA is established from an external device.

You can set up a radio link from the WSA to an SPP-compatible external device

using the AT command interface, or by switching the operating mode.

The WSA offers two SPP services at the Bluetooth

®

interface:

Table 7: SPP Services

SPP Port Index

Designation

Function

1

DATA

Data exchange

2

CONFIG

Configuration

Simultaneous use of both SPP services is supported, meaning two radio links to

one external device, or one radio link each to two different external devices can

exist at the same time.

The “DATA” SPP service is the standard when links are established!

Devices compliant with the Bluetooth

®

SPP standard can select the service to

which a link is to be set up while the link is being established. Not all devices,

however, offer the user the option of selecting the SPP service. Devices which do

not offer this selection option frequently select the SPP service with the lowest

port index automatically. If a link to the WSA is set up using such a device, the

SPP service “DATA” is used.

4.1.1 SPP Service “DATA”

This feature enables access to the service interface, allowing the WSA to function

as a protocol converter.

Links set up by the WSA to an external device always utilize the “DATA” SPP

service.

20 Function Description WAGO-I/O-SYSTEM 750

750-921 Bluetooth

®

Adapter

Manual

Version 2.0.1, applicable from FW Version 02

4.1.2 SPP Service “CONFIG”

This service enables access to the AT command interface and, thus, to device

configuration. For a detailed description of this, refer to the Section “AT

Command Interface”.

4.2 AT Command Interface

Access to the AT command interface of the WSA is gained via either the service

or radio interface, but not both simultaneously.

Figure 3: Access to the AT command interface via the radio interface (SPP “CONFIG” service)

Figure 4: Access to the AT command interface via the service interface

As two simultaneous links are possible using the radio interface, the WSA's AT

command interface can be accessed via one link. At the same time, the second

link can be used to access data on fieldbus couplers/controllers or transducers.

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WAGO 750-921 User manual

WAGO 750-921 User manual

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