RFXCOM RFXtrx433 Spezifikationen PDF herunterladen (Seite 89)

LIST OF FIGURES 82

4.9. Diﬀerent data streams recorded with the scanalogic 2 logic analyser. The blue

trace is the reference data received with a RF Link receiver, the other three traces

are from the RFM22B. The time delay between the reference and the deglitched

output is due to the ﬁltering algorithm. It is easy to recognize the impact of the

AGC, as it causes rustling during intermissions or longer breaks. The green trace

is the rx-clock generated by a clock recovery circuit from the data input and ﬁlter

parameters. Its frequency is approximately 38 kHz; however, the irregularities in

the picture are due to the low sampling frequency of logic analyser, they do not

exist in reality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.10. All three platforms together. The PCBs of the shown WiﬁCtrl and MiniCtrl have

no solder resist, therefore their colours diﬀer from those of the WiﬁControl 433. . 46

4.11. The gateway driver with its ROS interfaces. . . . . . . . . . . . . . . . . . . . . 48

4.12. The internal structure of the gateway driver. Each block represents an object

within the program, in which the green objects are third-party classes. The diﬀerent

objects communicate through signals and slots as well as by method calls. The

driver blocks are drivers of the operating system, which convert the serial stream

to USB and distribute the TCP packages over WLAN. . . . . . . . . . . . . . . 49

4.13. The device manager with its ROS interfaces. . . . . . . . . . . . . . . . . . . . . 51

4.14. The internal structure of the device manager node. . . . . . . . . . . . . . . . . 52

4.15. The internal structure of the device manager class. . . . . . . . . . . . . . . . . 53

4.16. Three diﬀerent HA networks with connections between IT and HE devices. . . . 55

4.17. The visualization node with its ROS interfaces. . . . . . . . . . . . . . . . . . . 56

4.18. The internal structure of the visualization node. . . . . . . . . . . . . . . . . . . 58

4.19. The MainWindow displaying the start menu. . . . . . . . . . . . . . . . . . . . . 59

4.20. The receiver dialog on the left and the transmitter dialog on the right. . . . . . . 60

4.21. The visualization menu showing the database in receiver view. . . . . . . . . . . 61

4.22. The main elements of the visualization menu. QGraphicsView is used to display the

QGraphicsScene, which contains custom receiver and sender items for rendering.

To optimize the access time, two QMultiHash containers store pointers of the items. 62

4.23. The scene menu with the example scene "dormitory", which contains three re-

ceivers: a light, a power plug for a computer and another power plug. A green

background means the receiver is switched on, red means it is switched oﬀ. . . . 63

4.24. The three tabs on the bottom right corner of the scene menu (see ﬁgure 4.23 on

page 63). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

4.25. The structure of the scene database. . . . . . . . . . . . . . . . . . . . . . . . . 64

5.1. The structure of the software chain for testing the performance of the diﬀerent

nodes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 95

Keine Kommentare

RFXCOM RFXtrx433 Spezifikationen Seite 89