D-Link DSL-G684T Instrukcja Użytkownika Pobierz pdf (Strona 55)

achievable. As always those are the values from perfect conditions. In real life range did

not exceeded 100 meters outdoor in building area.

Influence of another networks

To test this issue, whole system was working in the area with four another wireless

networks. Despite this fact, no visible interference between the network was noticed.

Photocell accuracy (daylight, bulb, fluorescent lamp)

During the test I have noticed that the type of light source from which we are trying

to measure light intensity has a great influence on the results. When we use bulb the light

flickers with such an intensity that despite constant distance and light intensity the reading

form photocell in extreme case was dropping and rising in range of  Fluorescent

lamp effected in reading variations at level of maximal 5 points when daylight reading was

nearly constant. To overcome this effect, but not at the big cost of accuracy, the delay at



Speed control

As this project is based on open source platform many beta or hobby libraries are

available. One of those is VarSpeedServo library which allows us to easily control speed of

the connected servos. Due to the problems with application that appeared when project was

created I have decided not to use this library. Considering rapid development of

VarSpeedServo library it will be very valuable asset in future modifications of WCS.

Electric discharge

Another advantage that is really important in application of this control system is

safety from electric discharges. When power supplied from source separate from the power

network there is no risk in electric discharges from the grid. This allows us to omit

expensive devices which task is to protect from power network influence.

Reset

Two reset button are placed on the control system. One(silver/gold) acts like

turning on and off again. It is meant to be use when WCS hangs up. The other one(black)

is designed to reset to defaults settings of the wireless module. Both of them appears to be

working without any problems.

Antenna

To expand range of the device external antenna is provided. In prototype standard

2dBi D-link antenna is used. As standard connector is used there is possibility to change

antenna to one with greater range.

Hanging up

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D-Link DSL-G684T Instrukcja Użytkownika Strona 55