Witura WT-9001 IP65 Spécifications télécharger pdf (Page 20)

CHAPTER 2

LITERATURE REVIEW

GSM remote control is a tool that many produced in each country. Like the

United States, Japan, China, and Italy. But not all the product produced by each country

is similar. Results of the study, there were many differences in each GSM remote control

issued by the state. Differences can be seen in terms of the components used, operating

in each circuit are used, the chosen design, and also applications for each product. But

the concept of equality is the same. The concept is to control a system to send SMS and

change the data that is sent to the desired output.

2.1 Company GSM

From the results of the study, there are several manufacturers that produce

products GSM remote control. Referred to table 1 shows a list of companies. All of this

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 81 82

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Witura WT-9001 IP65 Spécifications Page 20