Enocean Easyfit emdcb User manual

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

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!

EMDCB

2.4 GHz Bluetooth Low Energy Motion And Illumination Sensor

30.11.2018

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

REVISION HISTORY

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

Version

Author

Reviewer

Date

Major Changes

1.0

MKA

14.12.2018

First public release

1.1

MKA

18.02.2018

Additional information on light sensor

1.2

MKA

07.06.2019

Added 2 Mbit mode and RPA example

1.3

MKA

06.08.2019

More detailed description of sensor

functionality

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 specifica-

tions, 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

systems containing RF components must meet the essential requirements of the local legal

authorities.

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

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

animals or real value.

Recycling information

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

Please use suitable recycling operators for modules, components or packaging.

 
USER MANUAL 
 
 
 
EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR 
 
© 2019 EnOcean | www.enocean.com EMDCB User Manual | v1.3 | August 2019 | Page 3/67 
 
TABLE OF CONTENT 
1General Description .......................................................................................6 
1 Basic functionality ......................................................................................... 6 
2 Technical data............................................................................................... 7 
3 Environmental conditions ...............................................................................8 
4 Packaging information.................................................................................... 8 
5 Ordering information......................................................................................8 
2Functional Description.................................................................................... 9 
1 EMDCB Product Overview ............................................................................... 9 
2 Basic functionality ....................................................................................... 10 
3 Product design ............................................................................................ 10 
3.1 External product interface..................................................................... 10 
3.2 Internal product interface ..................................................................... 11 
4 Functional modes ........................................................................................ 12 
4.1 Standard operation .............................................................................. 13 
4.2 Configuration ...................................................................................... 13 
5 Motion detection.......................................................................................... 14 
5.1 PIR detection characteristics ................................................................. 14 
5.2 Installation recommendations................................................................ 15 
6 Illumination measurement............................................................................ 16 
6.1 Light level sensor................................................................................. 16 
6.2 Solar cell ............................................................................................ 16 
3Radio transmission ...................................................................................... 17 
1 Radio channel parameters ............................................................................ 17 
2 Default radio transmission sequence .............................................................. 18 
3 User-defined radio transmission sequences..................................................... 18 
3.1 Three channel sequence ....................................................................... 19 
3.2 Two channel sequence.......................................................................... 20 
3.3 Single channel sequence....................................................................... 20 
4Telegram format ......................................................................................... 21 
1 Preamble.................................................................................................... 22 
2 Access Address ........................................................................................... 22 
3 Header....................................................................................................... 22 
4 Source address ........................................................................................... 22 
4.1 Static source address mode .................................................................. 23 
4.2 Resolvable private address mode........................................................... 24 
5 Check Sum................................................................................................. 25 
6 Payload...................................................................................................... 26 
6.1 Sensor status encoding ........................................................................ 27 
6.2 Sensor Data Descriptor......................................................................... 27 
6.3 Data Size............................................................................................ 28 
7 Supported parameters ................................................................................. 28 
5EMDCB telegram authentication .................................................................... 29 

 
USER MANUAL 
 
 
 
EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR 
 
© 2019 EnOcean | www.enocean.com EMDCB User Manual | v1.3 | August 2019 | Page 4/67 
 
1 Authentication implementation...................................................................... 30 
6EMDCB commissioning ................................................................................. 31 
1 Radio-based commissioning.......................................................................... 32 
2 QR code commissioning ............................................................................... 32 
2.1 Device label ........................................................................................ 32 
2.2 Commissioning QR code ....................................................................... 33 
2.3 Commissioning QR code format ............................................................. 33 
3 Commissioning via NFC interface................................................................... 33 
7NFC interface.............................................................................................. 34 
1 NFC interface parameters ............................................................................. 34 
2 NFC access protection .................................................................................. 34 
3 Using the NFC interface................................................................................ 35 
3.1 USB NFC Reader.................................................................................. 35 
3.2 Android Smartphones with NFC ............................................................. 35 
4 NFC interface functions ................................................................................ 36 
4.1 NFC interface state machine.................................................................. 36 
4.2 IDLE state........................................................................................... 37 
4.3 READY 1 state..................................................................................... 37 
4.4 READY 2 state ..................................................................................... 37 
4.5 ACTIVE state....................................................................................... 37 
4.6 Read command ................................................................................... 38 
4.7 Write command ................................................................................... 38 
4.8 Password authentication (PWD_AUTH) command..................................... 39 
5 Configuration memory organization ............................................................... 40 
5.1 Changing the PIN code ......................................................................... 40 
6 NFC memory map ....................................................................................... 41 
6.1 NDEF Text field.................................................................................... 42 
6.2 Source Address ................................................................................... 42 
6.3 TX Channel Configuration ..................................................................... 42 
6.3.1 TX Channel Mode .............................................................................. 43 
6.4 Radio Configuration.............................................................................. 44 
6.4.1 TX Power ......................................................................................... 44 
6.4.2 Advertising Interval........................................................................... 45 
6.4.3 Manufacturer ID................................................................................ 45 
6.5 Optional Data...................................................................................... 46 
6.6 Security Key ....................................................................................... 46 
6.7 Security Configuration.......................................................................... 47 
6.7.1 Security Key Access .......................................................................... 47 
6.7.2 Address Mode................................................................................... 48 
6.7.3 LRN Telegram................................................................................... 48 
6.7.4 Security Mode................................................................................... 49 
6.8 Attribute Reporting, Optional Data Size and LED Intensity ........................ 49 
6.8.1 Attribute Reporting............................................................................ 50 
6.8.2 Optional Data Size ............................................................................ 50 
6.8.3 LED Intensity.................................................................................... 50 
6.9 Reporting interval ................................................................................ 51 
6.10 Low Power Mode.................................................................................. 51 

 
USER MANUAL 
 
 
 
EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR 
 
© 2019 EnOcean | www.enocean.com EMDCB User Manual | v1.3 | August 2019 | Page 5/67 
 
8Regulatory notes ......................................................................................... 52 
8.1 European Union........................................................................................... 52 
8.1.1 Declaration of conformity...................................................................... 52 
8.1.2 Waste treatment.................................................................................. 52 
8.2 FCC (United States)..................................................................................... 53 
8.2.1 FCC (United States) Certificate .............................................................. 53 
8.2.2 FCC (United States) Regulatory Statement.............................................. 54 
8.2.3 FCC Usage Conditions .......................................................................... 54 
8.2.4 FCC OEM Requirements ........................................................................ 55 
8.3 ISED (Industry Canada) ............................................................................... 56 
8.3.1 ISED (Industry Canada) Certificate ........................................................ 56 
8.3.2 ISED (Industry Canada) Regulatory Statement........................................ 57 
9Product history............................................................................................ 58 
AParsing EMDCB telegrams............................................................................. 59 
A.1 Data telegram example ................................................................................ 59 
A.1.1 BLE advertising frame structure ................................................................ 59 
A.1.2 Data telegram payload............................................................................. 59 
A.1.3 Sensor data ............................................................................................ 59 
A.2 Commissioning telegram example ................................................................. 60 
A.2.1 BLE advertising data ................................................................................ 60 
A.2.2 Commissioning telegram payload .............................................................. 60 
BAuthentication example for EMDCB telegrams ................................................. 61 
B.1 Input data .................................................................................................. 61 
B.2 Constant algorithm parameters ..................................................................... 62 
B.3 Intermediate parameters.............................................................................. 63 
B.4 RFC3610 execution sequence........................................................................ 64 
B.5 Execution example ...................................................................................... 65 
CAddress resolution for resolvable private addresses (RPA) ................................ 66 
C.1 RPA resolution flow...................................................................................... 66 
C.2 Obtaining the IRK........................................................................................ 66 
C.3 Address resolution example .......................................................................... 67 
 
 

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

1General Description

1.1 Basic functionality

EMDCB is a ceiling-mounted motion and illumination sensor that reports its status using

Bluetooth Low Energy (BLE) advertising telegrams. It enables the realization of energy har-

vesting wireless occupancy and light level sensors for light, building or industrial control

systems communicating wit the 2.4 GHz Bluetooth Low Energy communication standard.

EMDCB uses a passive infrared (PIR) sensor to detect motion and a dedicated illumination

sensor to measure the amount of ambient light.

EMDCB reports periodically (approximately every 2 minutes when no motion is detected,

approximately every 1 minute when motion is detected) the latest detected motion (motion

detected or no motion detected) together with the measured light level. EMDCB will report

immediately if motion is detected for the first time after a period without detected motion

(e.g. when a person is entering a room).

EMDCB is self-supplied via an integrated solar cell which generates the energy required for

its operation. EMDCB requires 50 lux illumination for 6 hours per day directly at the solar

cell which typically is equivalent 200 lux for 6 hours per day to at room level. EMDCB is

fully self-powered (no batteries required) under these lighting conditions.

For cases where sufficient ambient light is not available, EMDCB provides the option to

mount a CR2032 backup battery.

Radio telegrams transmitted by EMDCB are authenticated AES-128 security based on a de-

vice-unique private key and a sequence counter. This ensures integrity and authenticity of

the transmitted telegrams and prevents telegram replay (retransmission of previously

transmitted telegrams).

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

1.2 Technical data

Antenna

Integrated antenna

Output power

+ 4 dBm

Configurable via NFC

Communication range (guidance only)

75 m for ideal line of sight

10 m for indoor environment (line of sight)

Communication standard

BLE Advertising

Radio frequency (min / max)

2402 / 2480 MHz

Radio channels (default)

BLE CH 37 / 38 / 39 (2402 / 2426 / 2480 MHz)

Configurable via NFC

Data rate and modulation (default)

1 Mbit/s GFSK

Motion detection radius

Up to 5 m (16 ft.) when mounted 3 m (10 ft.) high

Illumination measurement range / resolution

0 … 65000 Lux / 1 Lux

Illumination measurement accuracy

+-5% at full scale

Update rate with / without detected motion

Approximately every 2 minutes / 1 minute

Configurable via NFC

Initial motion detection is reported immediately

User interface

LRN button

Sensitivity selection switch

Notification LED

Device identification

Unique 48 Bit Device ID (factory programmed)

Adjustable via NFC

Security

AES128 (CBC mode) with sequence counter

Power supply

Integrated solar cell

Required illumination to sustain operation (1)

6 hours per 24 hours at 200 Lux

Charge time from empty to full charge

30 hours at 200 Lux

Charge time from empty to first transmission

10 minutes at 200 Lux

Operating time in darkness

96 hours (after full charge)

Backup power supply (optional)

CR2032

Backup battery life

Infrequent bright light (200 lux for 2 hrs every day)

Consistent low light (65 lux for 5 hrs every day)

Total Darkness

20 years

15 years

7.5 years

Dimensions

113,2 mm L x 65,5 mm W x 30,7 mm H

(4.46” L x 2.58” W x 1.21” H )

Note 1:

The required illumination of 200 Lux for sustaining operation is given for a typical operating environment (e.g. at

desk level in an office). The required minimum illumination directly at the solar cell of EMDCB is 50 Lux.

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

1.3 Environmental conditions

Maximum Operating Temperature(1)

0 … 60°C / 32 … 140 F (indoor use only)

Recommended Operating Temperature(1)

0 … 30°C / 32 … 85 F (indoor use only)

Humidity

20% to 85% r.h. (non-condensing)

Note 1: PIR detection requires that the moving object to be detected is significantly warmer

than its environment. For the case of human motion, this means that the environment

needs to be significantly colder than the human body temperature of 36.5 °C / 98 F.

1.4 Packaging information

Packaging Unit 12 units

Packaging Method Box / pallet

1.5 Ordering information

Type

Ordering Code

Frequency

EMDCB-W-EO

E6221-K515

2.4 GHz (BLE)

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2Functional Description

2.1 EMDCB Product Overview

The energy harvesting ceiling-mounted motion and illumination sensor EMDCB from

EnOcean provides wireless motion and illumination sensing functionality without batteries.

Power is provided by a built-in solar cell. EMDCB transmits sensor data based on the

2.4GHz Bluetooth Low Energy standard.

The outer appearance of EMDCB is shown in Figure 1 below.

Figure 1 –EMDCB external view

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.2 Basic functionality

EMDCB devices contain a passive infrared sensor that detects changes in the received infra-

red radiation which are characteristic for the movement of persons.

EMDCB integrates a solar cell that generates the required energy for its operation from

available ambient light.

The user interface of EMDCB consists of one button for simple configuration tasks and one

LED to provide user feedback.

EMDCB is designed for ceiling mounting. It can be mounted on most ceilings with suitable

screws or mounted on dropped ceilings using wire brackets.

2.3 Product design

Figure 2 below shows the EMDCB product design including key functional elements.

2.3.1 External product interface

EMDCB uses a dedicated infrared lens in conjunction with a passive infrared sensor to de-

tect motion.

EMDCB it contains a dedicated sensor for illumination measurement. In addition, the inte-

grated solar cell can also be used to measure the external light level. It also provides the

required power for operation in normal lighting conditions.

The external user interface consists of one button (LRN) and one LED that together can be

used for simple configuration and test activities.

Figure 2 –EMDCB front and rear view

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.3.2 Internal product interface

EMDCB contains a holder for a CR2032 battery and a PIR sensitivity selection switch as

shown in Figure 3 below.

Figure 3 –EMDCB internal view

The internal product interface is accessible after removing the wall mount plate. If EMDCB

has not yet been mounted onto the ceiling then the wall mount plate can be removed by

using a screw driver (or similar) with the opening slot. If the EMDCB wall mount plate is

already attached to the ceiling, then EMDCB can be removed by gently pulling the housing.

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.4 Functional modes

EMDCB supports three types of functional modes:

◼Standard operation (shown in blue below)

◼Configuration (shown in grey below)

◼Standby (shown in orange below)

The transition between these modes occurs based on user action (press of the LRN button),

motion detection or based on pre-defined timing intervals.

SLEEP

LRN

Single

Button Press

Double

Button Press

Triple

Button Press

WALK TEST

LED

ON / OFF

Timer

Initial Motion

DATA

Long

Button Press STANDBY

Single

Button Press

Very Long

Button Press FACTORY

RESET

Figure 4 –EMDCB functional modes

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.4.1 Standard operation

During standard operation, EMDCB wakes up periodically and reports the current light level

and motion detection status using data telegrams.

The motion detection functionality is described in chapter 2.5, the light level sensing func-

tionality in chapter 2.6 and the data telegram transmission and format in chapters 3 and 4

respectively.

The EMDCB wake-up timer is configured to wake-up EMDCB approximately every 2 minutes

during periods without detected motion and approximately every 1 minute during periods

with detected motion. If motion is detected for the first time after a period without motion

then EMDCB wakes up immediately.

Both the occupied and the unoccupied wake-up intervals are affected at random in order to

increase the robustness of the radio transmission and to comply with regulatory require-

ments.

It is possible to change the wake-up intervals using the NFC interface as described in chap-

ter 7. In case of reducing the reporting interval, the resulting increase in required energy

(provided by the available light or a backup battery) has to be considered.

2.4.2 Configuration

Most EMDCB device parameters can be configured using the NFC interface as described in

chapter 7. Some of the most common parameters or states can additionally be configured

using the LRN button.

Table 1below lists those.

Table 1 –EMDCB external interface actions

Button Sequence Button Timing EMDCB Action LED Feedback

Single Short press < 1s

Exit from Sleep Mode if light is present

Send Learn Telegram

1 short blink

< 1s press,

< 1s release,

< 1s press

< 1s press,

< 1s release,

< 1s press,

< 1s release,

< 1s press

Error: No feedback

Success: 3 short blinks

Error: No feedback

Success: 5 short blinks

Very Long Press

Factory Reset

Double Short

Press

Start Walk Test

(End after 2 minutes or upon next button press)

1 short blink every time movement is detected

(1 second minimum interval between blinks)

Long Press

Enter Sleep Mode

(Disable LED and Radio)

Triple Short Press

Toggle LED indication

LED enabled: 2 short blinks

LED disabled: No feedback

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.5 Motion detection

EMDCB contains an integrated passive infrared (PIR) detector that can detect moving ob-

jects based on the temperature difference between the moving object and its environment.

2.5.1 PIR detection characteristics

EMDCB is designed to detect movement within a radius of up to 5 m (16 ft.) when mounted

at a ceiling of 3 m (10 ft.) height. The recommended coverage area for best detection per-

formance is within a radius of 3 m (10 ft).

Figure 5 below shows the PIR detection pattern.

Figure 5 –EMDCB PIR detection pattern

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.5.2 Installation recommendations

Motion detection works based on the temperature difference between a moving object and

its environment. Detection accuracy can therefore be affected by the following factors:

•Insufficient temperature difference (leading to no detection)

•Obstructions between PIR detector and moving person (leading to no detection)

•Warm moving objects (leading to false detections)

•Electro-magnetic radiation

For the case of person detection, the temperature of the moving object is the human body

temperature (normally around 36.5 °C / 98 F). If under very hot conditions the tempera-

ture of the environment approaches the temperature of the human body, then detection

performance will be significantly reduced.

For the same reason, hot objects within the detection area should be avoided. Examples

include standing lights, heaters or electrical equipment generating heat.

To reliably detect motion, an unobstructed line of sight from the sensor to the person(s) in

the detection area is required. Walls, room dividers, plants, book shelfs, hanging lights or

other obstacles within the line of sight can limit the detection performance.

The following factors should be considered to avoid the unintended detection of other warm

moving objects:

•Rapid temperature changes in the vicinity of the PIR detector, e.g. caused by fans or

fan heaters being switched on or off

•Lights (especially incandescent or halogen) being switched on or off in the immedi-

ate catchment area

•Warm moving objects such as animals, machines (e.g. cleaning robots or toys), hot

paper output of fax machines and laser printers, falling flower petals

•Motion in areas adjacent to the intended detection area, e.g. in the floor or in the

aisle around the detection area or outside of the window

Strong external electro-magnetic fields might induce noise into the highly sensitive PIR de-

tection circuitry and thereby affect the detection performance. EMDCB should therefore not

be mounted in close vicinity of electro-magnetic radiation sources such as WiFi access

points, gateways, wireless audio or video systems or other wireless devices.

For consistent detection, the mounting site of EMDCB should not be exposed to vibrations

or motion.

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

2.6 Illumination measurement

EMDCB integrates a dedicated light level sensor used to accurately measure and report the

light level directly underneath (e.g. on the desk surface).

In addition to the light sensor, EMDCB provides the option to use the calibrated solar cell

response to report wide area illumination. This can be used both as input for lighting con-

trol systems (e.g. to report ambient light for daylighting applications) and to verify the

available light level is sufficient for self-powered operation of EMDCB.

2.6.1 Light level sensor

EMDCB contains a dedicated humidity sensor with narrow aperture and a spectral response

optimized to mimic the human eye’s perception of ambient light. This light sensor reports

the light level directly underneath the sensor (spot measurement).

Figure 6 shows the spectrum response of the EMDCB illumination sensor compared to that

of the human eye.

Figure 6 –Spectrum response of EMDCB illumination sensor

2.6.2 Solar cell

EMDCB can report the light level by measuring the energy generated by the solar cell. This

can be used both to ensure that a sufficient ambient light is available to power the device

and to measure incoming light if the solar cell is oriented towards the window. Reporting of

the solar cell light level can be enabled and disabled via the NFC interface as described in

chapter 7.6.8.1.

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

3Radio transmission

3.1 Radio channel parameters

EMDCB transmits Bluetooth Low Energy (BLE) advertising telegrams within the 2.4 GHz

radio frequency band (2402MHz … 2480MHz).

By default, EMDCB will use the three BLE advertising channels (BLE Channel 37, 38 and 39)

defined for transmission. The transmission of a radio telegram on these three advertising

channels is called an Advertising Event.

Use of different radio channels within the frequency band from 2402 MHz to 2480 MHz is

possible using the NFC configuration interface, see chapter 7.

The initialization value for data whitening is set as follows:

◼For BLE channels is set according to specification (value = radio channel)

◼For the custom radio channels the initialization value is equal to the offset from

2400 MHz (e.g. value = 3 for 2403 MHz)

Table 2 below summarizes radio channels supported by EMDCB.

Radio Channel

Frequency

Channel Type

BLE Radio Channels

2402 MHz

BLE Advertising Channel

2404 MHz

BLE Data Channel

2406 MHz

BLE Data Channel

…

2424 MHz

BLE Data Channel

2426 MHz

BLE Advertising Channel

2428 MHz

BLE Data Channel

2430 MHz

BLE Data Channel

…

2478 MHz

BLE Data Channel

2480 MHz

BLE Advertising Channel

Custom Radio Channels

2403 MHz

Custom Radio Channel

2405 MHz

Custom Radio Channel

…

2477 MHz

Custom Radio Channel

2479 MHz

Custom Radio Channel

Table 2 –EMDCB supported radio channels

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

3.2 Default radio transmission sequence

EMDCB transmits telegrams in its standard configuration by using so-called Advertising

Events.

An advertising event is defined as the transmission of the same radio telegram on all se-

lected radio channels (by default this would be on BLE Channel 37, 38 and 39) one after

another with minimum delay in between.

For reliability reasons, EMDCB will send three advertising events for each reporting event.

The resulting transmission sequence is shown in Figure 7 below. The default interval setting

is 20 ms; an alternative setting of 10 ms can be configured via NFC (see chapter 7.6.4.2).

CHANNEL 37 CHANNEL 38 CHANNEL39 INTERVAL

(20ms or 10ms) CHANNEL 37 CHANNEL 38 CHANNEL39 CHANNEL 37 CHANNEL 38 CHANNEL39

INTERVAL

(20ms or 10ms)

Figure 7 –Default radio transmission sequence

3.3 User-defined radio transmission sequences

In certain situations it might be desirable to transmit radio telegrams on channels other

than the three advertising channels.

EMDCB therefore allows selecting the radio channels to be used for the transmission of data

telegrams and commissioning telegrams. The following transmission modes are supported:

◼Both commissioning telegrams and data telegrams are transmitted on the advertis-

ing channels as three advertising events. This is the default configuration and de-

scribed in chapter 3.2 above.

◼Commissioning telegrams are transmitted on the advertising channels as three ad-

vertising events while data telegrams are transmitted in a user-defined sequence as

described below.

◼Both commissioning and data telegrams are transmitted in a user-defined sequence

as described below.

The selection of the transmission mode is done using the TX_CHANNEL_MODE field of the TX

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

EMDCB supports the following user-defined sequences:

◼Three channel sequence

This sequence is similar to the default Advertising Event with the difference that the

user can select the radio channels to be used. The three channel sequence is de-

scribed in chapter 3.3.1 below.

◼Two channel sequence

In this sequence the radio telegram is transmitted using six transmissions on two

radio channels. It is described in chapter 3.3.2 below.

◼One channel sequence

In this sequence the radio telegram is transmitted using nine transmissions on one

radio channel. It is described in chapter 3.3.3 below.

3.3.1 Three channel sequence

The three channel radio transmission sequence is similar to the default transmission se-

quence with the difference that the radio channels (BLE Channel 37, 38 and 39 in the de-

fault transmission sequence) can be selected using the registers TX_CHANNEL1, TX_CHANNEL2

and TX_CHANNEL3.

In this mode, the telegram will be transmitted on the radio channel selected by TX_CHANNEL1

first, immediately followed by a transmission on the radio channel selected by TX_CHANNEL2

and a transmission on the radio channel selected by TX_CHANNEL3.

The telegram will be transmitted using this sequence three times in total as shown in Figure

8 below.

This transmission uses a default INTERVAL setting of 20 ms; an alternative setting of 10 ms

can be configured via NFC.

TX_CHANNEL1 TX_CHANNEL2 TX_CHANNEL3 TX_CHANNEL1 TX_CHANNEL2 TX_CHANNEL3 TX_CHANNEL1 TX_CHANNEL2 TX_CHANNEL3

INTERVAL

(20ms or 10ms)

INTERVAL

(20ms or 10ms)

Figure 8 –Three channel radio transmission sequence

USER MANUAL

EMDCB –BLUETOOTH LOW ENERGY MOTION AND ILLUMINATION SENSOR

3.3.2 Two channel sequence

The two channel radio transmission sequence transmits radio telegrams on two user-

defined radio channels (selected by TX_CHANNEL1 and TX_CHANNEL2) six times in total.

The telegram will in this mode be transmitted on the radio channel selected by TX_CHANNEL1

first, immediately followed by a transmission on the radio channel selected by TX_CHANNEL2.

This transmission sequence uses a default INTERVAL setting of 20 ms; an alternative setting

of 10 ms can be configured via NFC.

TX_CHANNEL1 TX_CHANNEL2 TX_CHANNEL1 TX_CHANNEL2

INTERVAL

(20ms or 10ms) TX_CHANNEL1 TX_CHANNEL2

INTERVAL

(20ms or 10ms)

...

Figure 9 –Two channel radio transmission sequence

3.3.3 Single channel sequence

The single channel radio transmission sequence transmits radio telegrams on one user-

defined radio channel (selected by TX_CHANNEL1) nine times in total.

This transmission sequence uses a default INTERVAL setting of 20 ms; an alternative setting

of 10 ms can be configured via NFC.

TX_CHANNEL1 TX_CHANNEL1

INTERVAL

(20ms or 10ms) TX_CHANNEL1

INTERVAL

(20ms or 10ms)

...

Figure 10 –Single channel radio transmission sequence

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