Abstract
The present invention provides a method for searching a sensor by signal strength. When a target sensor sends out a beacon packet to a mobile sensor, the mobile sensor advances along an advancement line and detects the signal strength of the beacon packet. If the signal strength received by the mobile sensor increases gradually, the mobile sensor is approaching a block with an increasing signal strength, and the mobile sensor will continue to advance towards a block with a strongest signal until the signal begins to decrease. The midpoint of the block with a strongest signal is its turning point. Once the signal strength begins to decrease, the mobile sensor stops immediately and turns back to the turning point and then turns to left or right and begins to search for another advancement line and turning point. By constantly repeating the above-mentioned guide path, the mobile sensor will accurately search and find a target sensor.