RFM69W RSSI inconsistent

[donaldhwong]

Hi,  I have been logging the RSSI of one RFM69 receiving from another on my desktop.

They just sit there.  There was no any movement or interference.

What I found out was that the RSSI flutuates from -65 to -45, while they are about 14" apart. See screen capture below..

Why?  How do I make it consistent in such static situation?  Will elongate the antenna do the job?

I has using the 1/4 length antenna supplied by Felix.

Thank you.

[kobuki]

I read higher values when they're a few meters apart so something might be off with your setup. I'd probably verify the soldering of the antenna or interference sources like a noisy USB connection. You may have RF interference originating from somewhere else out of your reach. It's also possible that your receiver node sometimes picks up bounced signals and sometimes a direct one. You could also try to move them a bit apart. What freq. band are you using?

[donaldhwong]

HI Kobuki,

Thank you for your input.  I am not worried about low reception.  What bothers me is the inconsistency of the RSSI. As you can see from the Photo, it was at -45 db, then it dropped to -65 db.  What happened??  How can it be possible?

You may be right that I may have experience "unnoticable" interference from outside of the house.

I will separate the two and observe for awhile longer.

[Felix]

Make sure you are using the settings right so they match the hardware, and that antennas are soldered properly and are straight (not coiled).

[donaldhwong]

Hi Felix,

I am using your default Gateway and Node as is, without any edits.  What other setting do I have to be concerned with?

Please advise?

Thank you,
Donald

[Felix]

Can you please look at the code and read the instructions.
Go to lowpowerlab.com/programming
Don't expect this forum to provide advice on every single line of code you are using. A lot of the heavy lifting has been done but you are expected to understand and do a lot yourself.