SENA HD1100 - Manual (Page 28)

Starter Kit and User Manual for the HelloDevice 1100
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6. Connecting User Devices
The I/O control commands are transferred to the HelloDevice through the TCP/IP protocol using the Internet
socket interface program installed in the user PC. The HelloDevice controls the output contact points of its I/O
interface as “high” or “low”, and checks the values of the input contact points(“high” or “low”). Input values are
transmitted through the network to the socket interface program on the user PC. This provides remote command
and monitoring functions through the Internet.
Figure 6.1 shows the remote control/monitoring configuration of the HelloDevice and the command/response
path. In short, for the user to implement a hardware control and monitoring function through the Internet using
the HelloDevice, he has to carry out two tasks:
(1) Implement the Internet socket program or Java applet as specified by the HelloDevice communication
protocol.
(2) Configure hardware to match the HelloDevice I/O interface.
Figure 6.1. Remote control/monitoring of the HelloDevice
Ethernet
192.168.1.15
192.168.1.23 192.168.1.21
: TCP 6001 Port
User PC User PC
Commands to Control I/O
Contact Point
Responds to I/O
Contact Point Status
16 Contact
Points Input
Actuator Sensor
Switch
16 Contact Points
Output
HelloDevice
Comm. Protocol