EnOcean PTM535Z 2405 MHz - 2480 MHz transmitter User Manual

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

Patent protected:

WO98/36395, DE 100 25 561, DE 101 50 128,

WO 2004/051591, DE 103 01 678 A1, DE 10309334,

WO 04/109236, WO 05/096482, WO 02/095707,

US 6,747,573, US 7,019,241

Observe precautions! Electrostatic sensitive devices!

PTM 535Z 2.4 GHz Pushbutton Transmitter

31 May 2016

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

REVISION HISTORY

The following major modifications and improvements have been made to this document:

Version

Author

Reviewer

Date

Major Changes

1.0

MKA

MH, MF

01.03.2016

Initial Release

1.1

MKA

02.05.2016

Minor corrections

1.2

MKA

31.05.2016

Added appendix on telegram analysis

Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany

www.enocean.com, info@enocean.com, phone +49 (89) 6734 6890

Important!

This information describes the type of component and shall not be considered as assured

characteristics. No responsibility is assumed for possible omissions or inaccuracies. Circuitry

and specifications are subject to change without notice. For the latest product specifications,

refer to the EnOcean website: http://www.enocean.com.

As far as patents or other rights of third parties are concerned, liability is only assumed for

modules, not for the described applications, processes and circuits.

EnOcean does not assume responsibility for use of modules described and limits its liability to

the replacement of modules determined to be defective due to workmanship. Devices or sys-

tems containing RF components must meet the essential requirements of the local legal au-

thorities.

The modules must not be used in any relation with equipment that supports, directly or indi-

rectly, human health or life or with applications that can result in danger for people, animals

or real value.

Components of the modules are considered and should be disposed of as hazardous waste.

Local government regulations are to be observed.

Packing: Please use the recycling operators known to you.

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

TABLE OF CONTENT

1 GENERAL DESCRIPTION ................................................................................. 5

1.1 Basic functionality ......................................................................................... 5

1.2 Technical data ............................................................................................... 6

1.3 Physical dimensions ....................................................................................... 6

1.4 Environmental conditions................................................................................ 6

1.5 Packaging information .................................................................................... 6

1.6 Ordering information ...................................................................................... 6

2 FUNCTIONAL INFORMATION ........................................................................... 7

2.1 PTM 535Z Device Overview ............................................................................. 7

2.2 Basic Functionality ......................................................................................... 7

2.3 Device interface signals .................................................................................. 8

2.4 Power supply ................................................................................................ 8

2.5 Input signals ................................................................................................. 9

2.5.1 PTM 535Z input status encoding .............................................................. 9

2.6 Hardware configuration interface ................................................................... 10

2.6.1 Hardware-based security mode selection ................................................ 10

2.6.2 Hardware-based radio channel selection ................................................. 11

2.7 Radio interface ............................................................................................ 12

2.7.1 Antenna.............................................................................................. 12

2.7.2 Supported Radio Channels .................................................................... 12

2.7.3 Radio channel selection ........................................................................ 13

2.8 Operation modes ......................................................................................... 14

2.8.1 Data mode .......................................................................................... 14

2.8.2 Commissioning mode ........................................................................... 15

2.8.2.1 Entry into commissioning mode .......................................................... 16

2.8.2.2 Commissioning telegram .................................................................... 16

2.8.2.3 Radio channel adjustment .................................................................. 16

2.8.2.4 Determining the correct radio channel ................................................. 17

2.8.2.5 Storing the new radio channel and return to data mode ......................... 17

2.9 Security modes ........................................................................................... 18

2.9.1 Selecting the security mode .................................................................. 18

2.9.2 Security parameters ............................................................................. 18

2.10 Number of redundant telegrams .................................................................... 19

3 IEEE 802.15.4 Frame Structure ..................................................................... 20

3.1 PHY Header ................................................................................................ 21

3.2 MAC Header ................................................................................................ 22

3.3 MAC Trailer ................................................................................................. 22

3.4 MAC Payload ............................................................................................... 22

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

3.4.1 MAC payload structure for secure data telegrams..................................... 23

3.4.2 MAC payload structure for secure commissioning telegrams ...................... 24

3.4.3 MAC payload structure for standard data telegrams ................................. 25

3.4.4 MAC payload for standard commissioning telegrams................................. 26

4 Device Integration ....................................................................................... 27

5 APPLICATION INFORMATION......................................................................... 28

5.1 Transmission range ..................................................................................... 28

5.2 Duty Cycle .................................................................................................. 28

6 REGULATORY INFORMATION ......................................................................... 29

6.1 FCC (United States) Certification ................................................................... 29

6.1.1 FCC (United States) Labeling Requirements ............................................ 29

6.1.2 FCC (United States) Certificate .............................................................. 29

6.1.3 FCC (United States) Regulatory Statement .............................................. 30

6.2 IC (Industry Canada) Certification ................................................................. 31

6.2.1 IC (Industry Canada) Labeling Requirements .......................................... 31

6.2.2 IC (Industry Canada) Certificate ............................................................ 31

6.2.3 IC (Industry Canada) Regulatory Statement ............................................ 32

A Understanding PTM 535Z telegram structure ................................................... 33

A.1 Installation instructions for TI CC2531 packet sniffer ....................................... 33

A.1.1 CC2531EMK setup ................................................................................... 33

A.2 Configuration .............................................................................................. 34

A.3 Data capture ............................................................................................... 36

A.4 Interpretation of the telegram data ................................................................ 37

A.4.1 MAC Payload ........................................................................................... 37

A.4.2 Device ID ............................................................................................... 37

A.4.3 Sequence Counter ................................................................................... 37

A.4.4 Command payload ................................................................................... 38

A.4.5 Telegram Signature ................................................................................. 38

PTM 535Z 2.4 GHz Pushbutton Transmitter

USER MANUAL

1 GENERAL DESCRIPTION

1.1 Basic functionality

PTM 535Z enables the realization of energy harvesting wireless switches for EnOcean sys-

tems communicating based on the 2.4 GHz IEEE 802.15.4 radio standard.

PTM 535Z is primarily intended for operation in conjunction with the EnOcean ECO 200 energy

harvester. ECO 200 can be either mechanically connected using two contact pairs or connect-

ed to the electrical interface of PTM 535Z.

Upon detection of energy pulses from the ECO 200 harvester, PTM 535Z will read the status

of additional input signals (on-board meander contact, external input signals) and report the

result as IEEE 802.15.4 radio telegram. Both secure and normal transmission modes are sup-

ported.

PTM 535Z telegram format has been defined to maximize compatibility with a wide range of

devices including such supporting the ZigBee Green Power standard. PTM 535Z radio tele-

grams are protected with AES-128 security based on a device-unique private key.

PTM 535Z contains a learn button (LRN) to send dedicated commissioning telegrams and to

change the radio channel. Radio channel and security mode can also be selected using the

hardware configuration interface consisting of six zero Ohm resistor pads (R1 … R6).

PTM 535Z provides a five pad external electrical interface with the following signals:

 External connection to ECO 200 (AC1 and AC2)

 Two external input signals (IN1 and IN2)

 Ground (GND)

PTM 535Z is mechanically compatible with the outline of existing PTM 33x modules. Figure 1

below shows PTM 535Z.

Figure 1 – PTM 535Z Product Outline

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

1.2 Technical data

Antenna

Integrated PCB antenna

External 50 Ohm whip antenna (optional)

Radio Standard

IEEE 802.15.4 (2.4 GHz)

Supported Radio Frequency Range

IEEE 802.15.4 radio channel 11 … 26 (default: channel 11)

Radio Channel Selection

HW-configurable (0 Ohm resistor pads)

User-selectable (Commissioning)

Commissioning

Learn Button (on-board)

Security

AES128 with Sequence Code

(Can be disabled via HW configuration)

Transmit Power (typ, at 25°C)

+2 dBm

Power Supply

ECO 200 Kinetic Energy Harvester

Harvester Interface

2 pairs of contacts

On-board Button Interface

1 meander contact

External Interface

5 pins (solderable)

2 ECO 200 contacts, 2 button inputs, Ground

Certification

R&TTE (Europe)

1.3 Physical dimensions

Module Dimensions

26.2 x 21.15 x 3.5 mm

Module Weight

2g

1.4 Environmental conditions

Operating Temperature

-25°C ... 65°C

Storage Temperature

-25°C ... 65°C

Humidity

0% to 95% r.h. (non-condensing)

1.5 Packaging information

Packaging Unit 100 units

Packaging Method Tray / Box (10 units per tray, 10 trays per box)

1.6 Ordering information

Type

Ordering Code

Frequency

PTM 535Z

S3071-A535

2.4 GHz (IEE 802.15.4)

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2 FUNCTIONAL INFORMATION

2.1 PTM 535Z Device Overview

The radio transmitter device PTM 535Z from EnOcean enables the implementation of wire-

less remote controls without batteries. Power is provided by an external power generator

(typically ECO 200).

PTM 535Z device transmits data based on the 2.4GHz IEEE 802.15.4 standard.

Key components of PTM 535Z are shown on the picture below.

Note that two contact pairs of AC1 and AC2 are located on the bottom side of the PCB and

therefore not visible in the picture.

Figure 2 – Electro-dynamic powered radio transmitter device PTM 535Z

2.2 Basic Functionality

PTM 535Z devices contain an interface with two pair of signals (AC1 and AC2) used to con-

nect an external energy generator (ECO 200). Having two contact pairs improves the me-

chanical design flexibility.

Upon detection of an energy pulse, PTM 535Z reports the status of the on-board meander

contact (M1), the external input signals IN1 and IN2 and the polarity of ECO 200 action

(press or release).

“Press” is defined within the scope of this document as a move of a mechanically connected

ECO 200 away from the PTM 535Z PCB while “Release” is defined as a move towards the

PTM 535Z PCB

Radio telegrams are transmitted using the on-board antenna (ANT). An external antenna

(EXT_ANT) can optionally be used, capacitor CA needs to be removed in that case. Radio

telegram format has been defined to maximize compatibility with a wide range of devices

including such supporting the ZigBee Green Power standard.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.3 Device interface signals

Table 1 below summarizes key elements and interface signals of PTM 535Z.

NAME

DESCRIPTION

NAME

DESCRIPTION

AC1

Input 1 from ECO 200

AC2

Input 2 from ECO 200

IN1

External input 1

IN2

External input 2

ANT

On-board PCB antenna

EXT_ANT

External antenna

M1

Meander contact

LRN

Learn button

R1 … R6

Configuration resistors

GND

Ground

Table 1: PTM 535Z key elements and interface signals

The PTM 535Z device interface is described in more detail below.

2.4 Power supply

PTM 535Z is intended to be supplied by a connected ECO 200 kinetic energy harvester. ECO

200 can be connected to PTM 535Z in the following ways:

 Mechanical connection to one of the two pairs of AC1 / AC2 pads

Use of a suitable mechanical design is required to reliably fixate the ECO 200 contacts

with the AC1 / AC2 connection pads

 Electrically connected using the AC1 / AC2 signals of the external interface

Figure 3 below illustrates the mechanical connection between an ECO 200 kinetic energy

harvester and PTM 535Z.

Note that two pairs of contacts are provided by PTM 535Z to enable two orientations of ECO

200 (spring facing down = red lines / spring facing up = yellow lines) depending on the

requirements of the customer mechanical design.

Figure 3: Mechanical connection between ECO 200 and PTM 535Z

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.5 Input signals

PTM 535Z data transmits telegrams indicating the status of the following input signals:

 ECO 200 action direction (press or release)

Press indicates a move away from the PCB (and the ECO 200 contacts)

Release indicates a move towards the PCB (and the ECO 200 contacts)

 On-board meander contact (M1)

This meander contact is intended for use with a conductive rubber button and is consid-

ered to be active if it is closed.

Contact EnOcean for reference on suitable rubber contact mats if required.

 External input signals (IN1 and IN2)

PTM 535Z provides and internal pull-up resistor on these signals.

These inputs are considered active if they are connected to Ground (GND).

2.5.1 PTM 535Z input status encoding

Table 2 below shows the encoding used by PTM 535Z.

Input 2 (IN2)

Input 1 (IN1)

Meander (M1)

ECO 200

Command

0 = Not Connected to GND

1 = Connected to GND

0 = Open

1 = Closed

Press= Move away from PCB

Release = Move towards PCB

0

Release

0x23

0

Press

0x22

0

1

Release

0x12

0

1

Press

0x13

0

1

0

Release

0x14

0

1

0

Press

0x15

0

1

Release

0x16

0

1

Press

0x17

1

0

Release

0x18

1

0

Press

0x19

1

0

1

Release

0x1A

1

0

1

Press

0x1B

1

0

Release

0x1C

1

0

Press

0x1D

1

Release

0x1E

1

Press

0x1F

Table 2: PTM 535Z input status encoding

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.6 Hardware configuration interface

PTM 535Z provides a hardware configuration interface based on six zero Ohm resistor foot-

prints (R1 … R6).

Populating these resistors allows customer-specific adaption of the following parameters:

 Hardware-based security mode selection

 Hardware-based radio channel selection

2.6.1 Hardware-based security mode selection

By default, PTM 535Z transmits securely authenticated data telegrams based on AES128

encryption standard using a 16 byte device-unique secret key and a 4 byte sequence

counter.

For certain applications it might be desirable to transmit data telegrams without sequence

counter and device security key / telegram signature. PTM 535Z can be configured to do so

by populating configuration resistor R2.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.6.2 Hardware-based radio channel selection

By default, the radio channel used by PTM 535Z can be changed by the user during com-

missioning as described in chapter 2.8.2.3.

For certain applications it is desirable to pre-configure the radio channel in a way that it

cannot be modified by the user.

This can be achieved by populating configuration resistor R1. If this resistor is populated

then the radio channel used by PTM 535Z will exclusively be determined by configuration

resistors R3 … R6 as shown in Table 3 below.

Using the LRN button, the user will trigger the transmission of a commissioning telegram,

but he cannot modify the radio channel.

R3

R4

R5

R6

Channel

Not populated

11

Not populated

Populated

12

Not populated

Populated

Not populated

13

Not populated

Populated

14

Not populated

Populated

Not populated

15

Not populated

Populated

Not populated

Populated

16

Not populated

Populated

Not populated

17

Not populated

Populated

18

Populated

Not populated

19

Populated

Not populated

Populated

20

Populated

Not populated

Populated

Not populated

21

Populated

Not populated

Populated

22

Populated

Not populated

23

Populated

Not populated

Populated

24

Populated

Not populated

25

Populated

26

Table 3: Resistor encoding for HW-based radio channel selection

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.7 Radio interface

2.7.1 Antenna

PTM 535Z transmits data based on an on-board PCB antenna (ANT). An external 50Ω whip

antenna connected to the EXT_ANT pin can alternatively be used. Connection to the inter-

nal antenna has to be cut in this case by removing capacitor CA.

Please check with EnOcean if you intend to use an external antenna.

2.7.2 Supported Radio Channels

PTM 535Z supports all sixteen IEEE 802.15.4 radio channels in the 2.4 GHz band (channels

11 … 26 according to IEEE 802.15.4 notation).

Table 4 below shows the correspondence between channel number and channel frequency

(in MHz).

Table 4: IEEE 802.15.4 Radio Channels and Frequencies (in MHz)

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.7.3 Radio channel selection

The radio channel used by PTM 535Z can be selected in two ways:

 User selection (using LRN button, default mode)

If configuration resistor R1 is not populated (default) then the radio channel can be se-

lected by the user as described in chapter 2.8.2.3

 HW selection (using configuration resistors, requires R1 to be populated)

If configuration resistor R1 is populated then the radio channel used by PTM 535Z is

fixed exclusively by the configuration resistors R3 … R6 as discussed in chapter 2.6.2.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8 Operation modes

PTM 535Z can operate in two modes:

 Data mode

Data mode is used to transmit data telegrams reporting the status of PTM 535Z button

inputs

 Commissioning mode

Commissioning mode is used to commission (learn, teach-in) PTM 535Z into a specific

receiver or network. To do so, PTM 535Z will identify its capabilities and its security pa-

rameters and – if required – change the radio channel it uses for telegram transmission.

2.8.1 Data mode

Data mode is the standard mode of operation. In this mode, PTM 535Z will transmit data

telegrams identifying the status of its inputs.

PTM 535Z uses the following sequence to identify and transmit input status:

1. Determine polarity of ECO 200 pulse (to identify press or release direction)

2. Read input status of all signals

3. Calculate data part of IEEE 802.15.4 radio telegram

4. Calculate security part of IEEE 802.15.4 radio telegram (if security is enabled)

5. Transmit radio telegram

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2 Commissioning mode

Commissioning mode provides two key functions:

 Transmission of a commissioning telegram in order to learn-in PTM 535Z into a network

 Radio channel selection in order to set the radio channel of PTM 535Z to that used by the

network

Figure 4 below shows the commissioning state chart used by PTM 535Z.

Figure 4: Commissioning state chart used by PTM 535Z

The different functions are described subsequently in more detail.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2.1 Entry into commissioning mode

Commissioning mode is entered as soon as PTM 535Z detects an energy pulse from ECO

200 in “Press” direction and the LRN button is pressed.

PTM 535Z will remain in commissioning mode as long as the LRN button is pressed when-

ever ECO 200 is actuated in the “Press” direction.

2.8.2.2 Commissioning telegram

PTM 535Z will transmit a commissioning telegram on the current radio channel upon enter-

ing commissioning mode. This enables PTM 535Z to be learned into additional devices with-

out modifying the currently used radio channel.

The type of commissioning telegram depends on whether PTM 535Z operates in secure

mode or standard mode, see chapter 2.9.1. The format of the commissioning telegram is

described in chapter 3.4.

2.8.2.3 Radio channel adjustment

PTM 535Z will enter radio channel adjustment mode if it has entered commissioning mode

and again the LRN button is pressed and ECO 200 is actuated in the “Press” direction.

PTM 535Z will then set the radio channel to channel 11 and transmit a commissioning tele-

gram on this radio channel. Resetting the radio channel to channel 11 ensures that the

number of required LRN events for selecting a radio new channel is independent of the cur-

rently used radio channel

Each subsequent press of the LRN button together with ECO 200 being actuated in the

“Press” direction will then cause the radio channel to be incremented and a commissioning

telegram to be transmitted on the channel. If channel 26 has been reached, then the se-

quence will start again with channel 11.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.8.2.4 Determining the correct radio channel

The user requires system feedback to determine if the correct radio channel has been

reached.

Several methods are possible for that, including:

 Feedback from the device into which PTM 535Z is learned in

E.g. blinking a status light, toggling a connected load, moving a motor etc.

 Feedback from a dedicated user interface

This could for instance instruct the user on the required key sequence and confirm cor-

rect execution

It is the responsibility of the system designer to define a suitable feedback mechanism.

2.8.2.5 Storing the new radio channel and return to data mode

If PTM 535Z has been successfully set to the desired radio channel then this radio channel

has to be stored and operation should return to data mode.

This is achieved by releasing the LRN button and actuating ECO 200 in the “Press” direc-

tion.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.9 Security modes

PTM 535Z can operate in two security modes:

 Secure mode (default, R2 not populated)

PTM 535Z operates in secure mode by default using AES128 security for data telegrams.

Security is based on a random, device-unique security key which is generated during the

production of the device.

 Standard mode (if R2 is populated)

PTM 535Z can operate in standard mode for applications requiring shorter payloads and

without the need for an AES128 signature.

2.9.1 Selecting the security mode

The default operation mode is secure mode. Standard mode can be selected by populating

configuration resistor R2.

2.9.2 Security parameters

PTM 535Z transmits data is secured based on a 4 byte sequence counter, an out of the box

device-unique key and a 4 byte signature calculated based on the AES128 encryption using

CBC mode.

The current status of the sequence counter together with the device-unique key are trans-

mitted during commissioning and have to be stored by the device where PTM 535Z is

learned in. These parameters are subsequently used to authenticate received telegrams.

EnOcean can provide references for the implementation of the required routines for key

exchange and message validation upon request.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

2.10 Number of redundant telegrams

For most telegram types, PTM 535Z will transmit the telegram more than once (redundant

transmission) in order to increase transmission reliability. The timing of the individual tele-

gram transmissions is random within a 5ms window.

The number of telegram transmissions is limited by the available energy and therefore de-

pendent on the telegram length (number of bytes to be transmitted).

Typically, PTM 535Z will transmit the following number of telegrams in secure mode:

 2 secure data telegrams

 1 secure commissioning telegram

Standard mode telegrams are shorter because the sequence counter and the security key

(commissioning telegram) / security signature (data telegram) do not need to be transmit-

ted.

Typically, PTM 535Z will transmit the following number of telegrams in standard mode:

 3 data telegrams

 3 commissioning telegrams

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3 IEEE 802.15.4 Frame Structure

PTM 535Z transmits radio telegrams in the 2.4 GHz band according to IEEE 802.15.4 frame

structure. For detailed information about the IEEE 802.15.4 standard, please refer to the

applicable specifications.

The following information about the IEEE 802.15.4 frame structure is given for reference

only. Note that the data format used is little endian. This means that for multi-byte struc-

tures (such as 2 byte, 4 byte or 8 byte fields) the least significant byte (LSB) is transmitted

first. The IEEE 802.15.4 frame structure used by PTM 535Z consists of the following four

main parts:

 PHY Header

The PHY header indicates to the receiver the start of a transmission and provides infor-

mation about the length of the transmission.

It contains the following fields:

- Preamble

Pre-defined sequence (4 byte, value 0x00000000) used to adjust the receiver

to the transmission of the sender

- Start of frame

Pre-defined symbol (1 byte, value 0xA7) identifying the start of the actual

data frame

- Length

1 byte indicating the combined length of all following fields

 MAC Header

The MAC header provides detailed information about the frame.

It contains the following fields:

- Frame control field

2 bytes to identify frame type, protocol version, addressing and security

mode

- Sequence number

1 byte sequential number to identify the order of transmitted frames

- Address

PAN ID and address of source (if present) and destination of the telegram

PTM 535Z does not use source address and source PAN ID

 MAC Payload

The MAC Payload field contains telegram control, device ID, telegram data and telegram

security (if present) fields.

The MAC Payload field structure depends on telegram type (data or commissioning) and

security mode (secure or non-secure transmission).

 MAC Trailer

The MAC Trailer contains the Frame Check Sum (FCS) field used to verify the integrity of

the telegram data.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

Figure 5 below summarizes the IEEE 802.15.4 frame structure.

Figure 5: IEEE 802.15.4 Frame Structure

The content of these fields is described in more detail below.

3.1 PHY Header

The IEEE 802.15.4 PHY header consists of the following fields:

 Preamble

 Start of Frame

 Length of Frame fields

The content of the Preamble and Start of Frame fields is fixed for all telegram types sup-

ported by PTM 535Z as follows:

 Preamble = 0x00000000

 Start of Frame = 0xA7

The content of the Length field differs depending on the telegram type as follows:

 Secure commissioning telegram

Length= 42 bytes (0x2A)

 Secure data telegram

Length = 24 bytes (0x18)

 Standard commissioning telegram

Length = 17 bytes (0x11)

 Standard data telegram

Length = 15 bytes (0x0F)

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3.2 MAC Header

The IEEE 802.15.4 MAC Header contains the following fields:

 Frame Control Field (2 byte)

The Frame Control Field is set to 0x0801 in all PTM 535Z telegrams in order to identify

them as data telegrams with short addresses based on version IEEE 802.15.4-2003

 Sequence Number (1 byte)

The Sequence Number is an incremental number used to identify the order of telegrams

 Address Field (4 byte in PTM 535Z implementation)

PTM 535Z uses short Destination Address (16 Bit) together with the Destination PAN ID

(16 Bit). Both are set to 0xFFFF to identify the telegrams as broadcast.

Source address and Source PAN ID are not present in PTM 535Z telegrams.

3.3 MAC Trailer

The MAC Trailer only contains the Frame Check Sum (FCS) field.

Its length is 2 byte and it is calculated as Cyclic Redundancy Check (CRC16) over the entire

MAC payload including the “Length” field of the PHY Header using the following polynomial:

x16 + x12 + x5 + 1

3.4 MAC Payload

The MAC Payload depends on the telegram type:

 Telegram type

- Data Telegram

- Commissioning Telegram

 Security mode

- Secure communication

- Standard communication

MAC payloads for the different telegram types are described in the following chapters.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3.4.1 MAC payload structure for secure data telegrams

Figure 6 below shows the MAC Payload structure of a secure data telegram.

Figure 6: MAC Payload structure for secure data telegrams

The following fields are used for secure data telegrams:

 Telegram Control (2 bytes)

The Telegram Control field is set to 0x308C indicating that PTM 535Z uses 4 byte pay-

load signature based on a device-unique key and a 4 byte sequence counter

 Source ID (4 bytes)

The Source ID field contains a 4 byte ID uniquely identifying each PTM 535Z device

 Sequence Counter (4 bytes)

The Sequence Counter field contains an always incrementing counter.

Security processing is based on the combination of the Command and Sequence Counter

in order to prevent replay attacks (sending the same telegram again)

 Command (1 byte)

The Command field is a one byte field which identifies the state of the different inputs of

PTM 535Z. For the encoding please seeTable 2.

 Telegram Signature (4 byte)

The Telegram Signature field is used to validate the telegram authenticity. The telegram

signature is calculated based on the telegram payload using AES128 (CBC mode).

EnOcean can provide upon request additional information on how to implement telegram

validation for PTM 535Z data telegrams.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3.4.2 MAC payload structure for secure commissioning telegrams

Figure 7 below shows the MAC payload structure of a secure commissioning telegram.

Figure 7: MAC Payload structure for secure commissioning telegrams

The following fields are used for secure commissioning telegrams:

 Telegram Control (1 byte)

The Telegram Control field is set to 0x0C to identify a standard telegram (secure com-

munication will be established based on the commissioning telegram)

 Source ID (4 bytes)

The Source ID field contains a 4 byte ID uniquely identifying each PTM 535Z device

 Commissioning Command (1 byte)

The Command field is set to 0xE0 by PTM 535Z

 Device Type (1 byte)

The Device Type field is set to 0x02 by PTM 535Z

 Device Options (2 bytes)

The Device Options field is set to 0xF281 by PTM 535Z when operating in AES128 secure

mode with authentication.

 Device-unique Security Key (16 bytes)

PTM 535Z implement a random, device-specific security key which is generated as part

of the production flow. During commissioning, this key is transmitted in encrypted for-

mat. Contact EnOcean for details.

 Security Key Validation (4 bytes)

In order to ensure correct reception, an additional 4 byte validation value is provided.

Contact EnOcean for details.

 Sequence Counter (4 bytes)

The Sequence Counter is an always incrementing counter which is used as part of the

security processing to avoid replay attacks (sending the same telegram again).

Receiving devices shall only accept data telegrams with sequence counter values higher

than that of the last received telegram; therefore the current value needs to be commu-

nicated during commissioning.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3.4.3 MAC payload structure for standard data telegrams

PTM 535Z will operate in standard mode if configuration resistor R2 is populated. Figure 8

below shows the MAC payload structure of a standard data telegram.

Figure 8: MAC Payload structure for Standard Data Telegrams

The following fields are used for Standard Data Telegrams:

 Telegram Control (1 byte, 0x0C)

This field is set to 0x0C to identify a standard data telegram

 Source ID (4 bytes)

4 byte ID uniquely identifying each PTM 535Z device

 Command (1 byte)

This is a one byte field which identifies the state of the different input of PTM 535Z.

For the encoding please see Table 2.

USER MANUAL V1.0

PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

3.4.4 MAC payload for standard commissioning telegrams

Figure 9 below shows the MAC payload structure of a standard commissioning telegram.

Figure 9: MAC Payload structure for standard commissioning telegrams

The following fields are used for standard commissioning telegrams:

 Telegram Control (1 byte)

The Telegram Control field is set to 0x0C to identify a standard telegram (secure com-

munication will be established based on the commissioning telegram)

 Source ID (4 bytes)

The Source ID field contains a 4 byte ID uniquely identifying each PTM 535Z device

 Commissioning Command (1 byte)

The Commissioning Command field is set to 0xE0 by PTM 535Z

 Device Type (1 byte)

The Device Type field is set to 0x02 by PTM 535Z

 Device Options (1 byte)

The Device Options field is set to 0x01 by PTM 535Z

USER MANUAL V1.0

PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

4 Device Integration

PTM 535Z is designed for integration with ECO 200 kinetic energy harvesters. EnOcean can

provide mechanical reference designs upon request.

USER MANUAL V1.0

PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

5 APPLICATION INFORMATION

5.1 Transmission range

The main factors that influence the system transmission range are:

- Type and location of the antennas of receiver and transmitter

- Type of terrain and degree of obstruction of the link path

- Sources of interference affecting the receiver

- “Dead spots” caused by signal reflections from nearby conductive objects.

Since the expected transmission range strongly depends on this system conditions, range

tests should always be performed to determine the reliably achievable range under the

given conditions.

The following figures should be treated as a rough guide only:

- Line-of-sight connections

Typically 15 m range in corridors, up to 50 m in halls

- Plasterboard walls / dry wood

Typically 15 m range, through max. 2 walls

- Ferro concrete walls / ceilings

Maximum 1 wall or ceiling, depending on thickness and material

- Fire-safety walls, elevator shafts, staircases and similar areas should be considered

as shielded

The angle at which the transmitted signal hits the wall is very important. The effective wall

thickness – and with it the signal attenuation – varies according to this angle. Signals

should be transmitted as directly as possible through the wall. Wall niches should be

avoided.

Other factors restricting transmission range include:

- Switch mounting on metal surfaces (up to 30% loss of transmission range)

- Hollow lightweight walls filled with insulating wool on metal foil

- False ceilings with panels of metal or carbon fibre

- Lead glass or glass with metal coating, steel furniture

The distance between the receiver and other transmitting devices such as computers, audio

and video equipment that also emit high-frequency signals should be at least 0.5 m.

5.2 Duty Cycle

PTM 535Z is designed for manually activated systems. In order to comply with duty cycle

limitations, it shall not be used to transmit telegrams more often than 10.000 times per

hour.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

6 REGULATORY INFORMATION

PTM 535Z has been certified according to applicable regulations.

Changes or modifications not expressly approved by EnOcean could void the user's authori-

ty to operate the equipment.

6.1 FCC (United States) Certification

PTM 535Z has been certified according to FCC rules.

6.1.1 FCC (United States) Labeling Requirements

The Original Equipment Manufacturer (OEM) must ensure that FCC labeling requirements

are met. This includes a clearly visible label on the outside of the final product. Attaching a

label to a removable portion of the final product, such as a battery cover, is not permitted.

The label must include the following text:

PTM 535Z Contains FCC ID: SZV-PTM535Z

The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to

the following two conditions: (i.) this device may not cause harmful interference and

(ii.) this device must accept any interference received, including interference that

may cause undesired operation.

When the device is so small or for such use that it is not practicable to place the statement

above on it, the information required by this paragraph shall be placed in a prominent loca-

tion in the instruction manual or pamphlet supplied to the user or, alternatively, shall be

placed on the container in which the device is marketed.

However, the FCC identifier or the unique identifier, as appropriate, must be displayed on

the device.

6.1.2 FCC (United States) Certificate

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

6.1.3 FCC (United States) Regulatory Statement

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.

USER MANUAL V1.0

PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

6.2 IC (Industry Canada) Certification

PTM 535Z has been certified according to IC rules.

6.2.1 IC (Industry Canada) Labeling Requirements

OEM wishing to use PTM 535Z under limited modular approval conditions must sign the

OEM Limited Modular Approval Agreement with EnOcean

The Original Equipment Manufacturer (OEM) must ensure that IC labeling requirements are

met. Labelling requirements for Industry Canada are similar to those required by the FCC.

This includes a clearly visible label on the outside of the final product. Attaching a label to a

removable portion of the final product, such as a battery cover, is not permitted. The label

must include the following text:

Contains IC: 5713A-PTM535Z

Pour utiliser le numéro IC EnOcean, le fabricant d'équipement d'origine (OEM) doit signer

l'accord OEM limitée Approbation modulaire avec EnOcean et doit s'assurer que les

exigences en matière d'étiquetage IC sont réunies.

Une étiquette clairement visible à l'extérieur d'une partie non amovible du produit final doit

contenir le texte suivant:

Contient le module d'émission IC: 5713A-PTM535Z

6.2.2 IC (Industry Canada) Certificate

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

6.2.3 IC (Industry Canada) Regulatory Statement

This device complies with Industry Canada licence-exempt RSS standard(s).

The end product into which PTM 535Z is assembled must provide a clearly readable label

with the following text: „Contains IC ID: SZV-PTM535Z“

Operation is subject to the following two conditions:

(1) this device may not cause interference, and

(2) this device must accept any interference, including interference that may cause unde-

sired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils

radio exempts de licence.

L'exploitation est autorisée aux deux conditions suivantes :

(1) l'appareil ne doit pas produire de brouillage, et

(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le

brouillage est susceptible d'en compromettre le fonctionnement.”

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

A Understanding PTM 535Z telegram structure

This appendix describes – purely for reference purposes – how to analyse the PTM 535Z

radio telegram structure using the TI CC2531EMK packet sniffer (USB dongle) on a Win-

dows 7 based system.

A.1 Installation instructions for TI CC2531 packet sniffer

The following description assumes the use of the TI CC2531EMK described here:

http://www.ti.com/tool/cc2531emk

CC2531EMK can be used in conjunction with the “TI SmartRF Protocol Packet Sniffer” to

capture and visualize IEEE 802.15.4 data telegrams.

To use TI SmartRF Protocol Packet Sniffer, please download the SW package from the TI

website. At the time of writing, the SW could be obtained using this link:

http://www.ti.com/tool/packet-sniffer

Please download and install this SW before proceeding with the instructions given in the

next chapter.

A.1.1 CC2531EMK setup

After setting up the TI SmartRF Protocol Packet Sniffer please insert the CC2531EMK USB

dongle into a USB port of the PC and make sure that the green LED of the dongle is active.

Please make sure that the required device driver for the CC2531EMK has been correctly

installed. To do so, please check the Device Manager where you should see an entry named

“CC2531 USB Dongle” under the group label “CEBAL Controlled Devices”.

Figure 10 – Correctly installed CC2531EMK

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

A.2 Configuration

After the installation of the CC2531EMK driver, please start the TI SmartRF Packet Sniffer

program. The protocol selection dialog program window which appears after the start of is

shown in Figure 11 below.

Figure 11 – Protocol selection dialog of TI SmartRF Packet Sniffer

In this dialog, please select “IEEE 802.15.4/ZigBee” as shown above and press the “Start”

button. Once the main window comes up, please make sure that “CC2531” is shown in the

“Capturing device” tab and in the “RF device:” footer line as shown in Figure 12 below.

Figure 12 – Main window TI SmartRF Packet Sniffer

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

Out of the box, PTM 535Zis configured for using IEEE 802.15.4 radio channel 11. Make sure

that this radio channel (0x0B) is selected in the “Radio Configuration” tab and shown in the

“Channel:” footer line.

Figure 13 – Radio channel selection

The data fields that will be displayed can be selected in the “Select fields” tab. Make sure

that all “MAC Header”, “Data” and “Footer” fields are selected and that the “LQI/RSSI”

drop-down list is set to “RSSI”.

Figure 14 – Payload selection

The TI SmartRF Packet Sniffer is now ready.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

A.3 Data capture

Press the triangular button ( ) to start the radio capture and press the auto-scroll button

( ) to automatically select the most recent data telegram. Then press a button of PTM

535Z.

You should now see the captured radio telegrams (PTM 535Z sends several redundant radio

telegrams per user action).

Figure 15 – Captured telegram data

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

A.4 Interpretation of the telegram data

The following parameters within captured radio telegrams are typically of interest:

1. MAC Payload

This will contain the ID of the sender, various control and security data fields as well

as the actual command data (1 byte)

The structure of this field is outlined subsequently in more detail.

2. RSSI

This will show the received signal strength

3. FCS

This will show the frame integrity (OK / not OK) and should normally show “OK”.

A.4.1 MAC Payload

Below is an example of a captured MAC payload for a secure data telegram (see chapter

3.4.1):

The hexadecimal representation of this specific payload is:

8C 30 57 21 71 30 04 CD BB AA 22 84 D1 99 78

The location and interpretation of key parameters is described in the following chapters.

A.4.2 Device ID

The 4 byte device ID is used to uniquely identify each device in the network. In the case of

secure data telegrams it is located at byte 2…5 of the MAC payload as highlighted below:

8C 30 57 21 71 30 04 CD BB AA 22 84 D1 99 78

Keep in mind that the byte order is little endian, therefore the ID of this specific device is

0x30712157.

A.4.3 Sequence Counter

The sequence counter is used to uniquely identify each telegram in order to avoid telegram

replay. The sequence counter is 4 byte long and only present if PTM 535Z operates in se-

cure mode.

In the case of a secure data telegram, the sequence counter is located at byte 6…9 of the

MAC payload as highlighted below:

8C 30 57 21 71 30 04 CD BB AA 22 84 D1 99 78

Keep in mind that the byte order is little endian, therefore the current sequence counter

value of this specific device is 0xAABBCD04.

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PTM 535Z – 2.4 GHZ PUSHBUTTON TRANSMITTER MODULE

A.4.4 Command payload

The command payload identifies the action performed on the switch (i.e. which buttons

have been pressed). In the case of a secure data telegram, the command is located at byte

10 of the MAC payload as highlighted below:

8C 30 57 21 71 30 04 CD BB AA 22 84 D1 99 78

In this case it is 0x22 meaning that button A0 has been pressed. Refer to chapter Fehler!

erweisquelle konnte nicht gefunden werden. for the description of commands sup-

ported by PTM 535Z.

A.4.5 Telegram Signature

PTM 535Z secure data telegrams can be authenticated via a signature.

This signature is 4 byte long and only present if PTM 535Z operates in secure mode. It is

calculated based on the private key (unique for each device), the data payload and a 4 byte

sequence counter (which is incremented for each transmitted radio telegram).

This approach prevents unauthorized senders from sending commands. Note that the con-

tent of the telegram itself is not encrypted, i.e. the switch command is sent as plain text.

In the case of a secure data telegram, the telegram signature is located at the last 4 bytes

of the telegram payload:

8C 30 57 21 71 30 04 CD BB AA 22 84 D1 99 78

Note that the signature changes with each transmission even if the remainder of the MAC

payload remains the same.

This is due to the inclusion of the rolling code into the MIC calculation which prevents mes-

sage replay attacks (capture and reuse of a previous message).

EnOcean PTM535Z 2405 MHz - 2480 MHz transmitter User Manual

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