what is minimum DBM/RSSI for secure connection?

RE: what is minimum DBM/RSSI for secure connection?

Eirik Nobuki Kosaka — Fri, 29 May 2015 10:45:29 GMT

Of course, thanks for the help guys

RE: what is minimum DBM/RSSI for secure connection?

Hung Bui — Fri, 29 May 2015 09:17:40 GMT

@Eirik: Would the reply from Bill answer your question? If it does could you accept it and we can close the case ?

RE: what is minimum DBM/RSSI for secure connection?

Eirik Nobuki Kosaka — Sun, 24 May 2015 14:09:21 GMT

Ok, thanks. I will see what i can do then.

RE: what is minimum DBM/RSSI for secure connection?

Bill Siever — Sun, 24 May 2015 13:19:15 GMT

There probably is some critical threshold where you could request that users move the devices closer together. This may be useful for certain use-cases, like updating firmware, but I'm not sure there's either a need or a good way to use RSSI to ensure a reliable transfer in general.

First, I don't think there's a need because individual packets already have a checksum. If you want to do a reliable transfer be sure to use the write with response (to confirm the write).

I don't think RSSI is a reliable indicator of robustness because it doesn't have much bearing on the continued reliability of the link. During a connection both devices involved could move causing RSSI to either decrease or increase. Furthermore, other factors, like outside interference on the channels or loss of power on either device, could cause the link to be lost.