Question

I finished an implementation of a bluetooth application for a robot. Server sided I used Windows 7 as OS with the MS-BT-Stack as well as C# as language with the "In the hand"-bluetooth library.
The target was to connect the robot via bluetooth when it s in range.

Just as extension I tried to read the signal strength to determine how far away the robot is (estimated). Okay, while googling (and searching on stackoverflow too^^), I found out that you can t do that with my used BT-stack. Since that I tried to figure out a workaround to calculate or estimate the signal strength (or the distance).
Something like sending a byte over bluetooth and see how long is the answer-time. Although I haven t implemented it due to a lack of time but does anybody think that this is a good idea? Or has some other thoughts about the problem?

我确实赞赏任何投入。

感谢!

Answer 1

我不认为这是一个好的想法。你无法根据反应时间对距离作出有意义的估计。在MAC层和软件堆中有许多因素会带来变化。

即便使用RSSI也不太好,因为使用RSSI也不太好。

(1) 2.4GHz的RSSI室内有重大的多胎问题,这意味着你可以搬走,看到信号更加强烈。

2) 蓝色人有权力控制反馈,双方不断调整特克斯权力,坐在固定的黄金范围内。因此,你越走,RSSI就立即停下来,那么电力控制循环会增强Tx的力量,使RSSI保持固定水平。

3) 蓝色硬件通常使用低精准的RSSI测量方法,这意味着你只得到粗略测量,而不是你可以准确依靠获得良好的远程测量。

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