Slides shown at TPAC15 with regards to the communication protocol Lemonbeat

1. Demonstration
F2F meeting
29-30 October 2015
Sapporo, Japan

2. Lemonbeat smart Device Language (LsDL)
RWE is first mover in SmartHome. Based on this, Lemonbeat was created as a follow up technology in this
area. Our practical experience was helpful to overcome known limitations.
This new approach has a lot of opportunities above the previous technic. It can support a very large spread
of use cases in different industries.
LsDL is a generic approach on application level. We believe that LsDL connect all devices in the Web of
things with each other. In short:
 Each device can explain itself and describe its own values.
 New devices are immediately identified and integrated into the network.
 New devices can be integrated without any supporting information. The units are self-
explanatory through LsDL.
 The status of each device is permanently observed. A status change immediately triggers a
defined follow-up activity. Activities can be automated.
 Device behavior can be changed during runtime.
2

3. Content of the demonstration
What we want to present
 Discovery and inclusion of a device - Request of value description
 3 examples of a traffic light device
 Configuration values and services for each example
 Virtual Values
 Calculation
 Actions
 State machines
 Timer
 Running
 All transactions are transparent through using Wireshark – you can see the complete flow of data
3

4. Functionality of state machines in LsDL
4
red
yellow
green
C4: V11 == 1
A2: red = 0, green = 1
V11 = (V11 + 1) % 3
A device can support virtual values,
which are values that can be configured
externally. These values can be used
as a variable when doing complex
calculations and state machines.
Calc. 1
Calc. 2
C3: P2.V1 == 1
A1: V11=C2
C5: V11 == 2
A3: yellow = 1,green = 0
C6: V11 == 0
A4: red = 1, yellow = 0

5. Functionality of state machines in LsDL
5
red
yellow
green
C4: V11 == 1
A2: yellow = 1
V11 = (V11 + 1) % 4
To change functionality,
states, actions and calculations
can be added or removed
Calc. 1
Calc. 2
C3: P2.V1 == 1
A1: V11=C2
C5: V11 == 3
A3: yellow = 1,green = 0
C6: V11 == 0
A4: red = 1, yellow = 0
red &
yellow
C4: V11 == 2
A2: red = 0, yellow = 0,
green = 1

6. Functionality of state machines in LsDL
6
red
yellow
green
C4: V11 == 1
A2: yellow = 1
V11 = (V11 + 1) % 4
Calc. 1
Calc. 2
C3: P2.V1 == 1
A1: V11=C2
C5: V11 == 3
A3: yellow = 1,green = 0
start T1
C6: V11 == 0
A4: red = 1, yellow = 0
stop T1, stop T2
red &
yellow
C7: V11 == 2
A5: red = 0, yellow = 0,
green = 1
T1: in 500 ms execute : A6
A6: yellow = 0, start T2
T2: in 500 ms execute : A7
A7: yellow = 1, start T1
Timers are in milli seconds,
after a timer is expired, it can
execute an action