How to make a simple Arduino wireless shield

There’s always the need for cheaper Arduino equipment and there’s always the need for wireless activities in your project. But an Arduino wireless shield costs much. Everyone of us has got an ethernet shield. They are good but not wireless. Well. Let’s see if we can improve this. At first you need an ethernet shield and a wireless router TL-WR702N. (both 30-35€ that’s half as much as the wireless shield here in Germany costs)
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