Radio Obstacle Project
Step 1. Download the “Signal strength monitor” or similar app on your smart phone and install it on your phone.
Step 2. Make use of another smart phone as a Wi-Fi hotspot.
Step 3. You have to analyze the effect of distance on the signal strength by moving one mobile phone away from the other. Place one mobile phone stationary and move the other phone to the different locations in your house and monitor the signal strength. Keep in mind that in this step the line of sight (LOS) should between the two phones should be maintained. You must fill the following table.
| No. | Distance between transmitter and receiver (meters) | Signal strength (dB) |
| 1 | 0 | |
| 2 | 5 | |
| 3 | 10 | |
| 4 | 15 | |
| 5 | 20 |
Step 4: Analyze the data you collected in step 3and identify the relationship between the distance and signal strength.
Step 5: Now disturb the line of sight between the two phones by placing the obstacles between them such as wood, concrete, glass, iron etc. (obviously you can make use of existing resources in your house such as doors, windows or walls ). Keep the distance between the two phones constant. You must fill the following table
| No. | Obstacle type | Signal strength (dB) |
| 1 | Concrete | |
| 2. | Wood | |
| 3. | Iron | |
| 4. | Glass | |
| 5. | Brick wall |
Step 6: You have the analyze the data you collected so that you may be able to understand which material cause the most reduction in the signal strength and why?
Step 7: (Bonus step): Try to come up with a formula that explains the relationship between the signal strength and the material.
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