RSSI info / provide signal strength

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RCcocktail
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Joined: 10 Feb 2017, 08:07

Re: RSSI info / provide signal strength

#21 Post by RCcocktail » 15 Feb 2017, 00:31

I should have mentioned that: I'm using 3.3V to power the RXB6.

akicker
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Joined: 01 Apr 2017, 10:31
Location: Vienna

Re: RSSI info / provide signal strength

#22 Post by akicker » 06 Apr 2017, 17:21

Leaving R6 in place and bridging R7 shortens RSSI and Data Output !

I have 2 of these RXB6 (one of them marked with Rev 2.0 - with the white Label Q.C. passed). Both of this boards have the same Layout.
One pad of R7 is connected to pin 14 (RSSI) of the receiver itself (SYN500R) and the other one to the connector pin 6 of the board,
so it should work, to move the 0 Ohm resistor R6 to R7.

Unforunately without success !
No RSSI signal at pin 6 "DER" - Looks like "not connected" or "floating"
Inspected with a multimeter and an oszilloscope.

Did anybody find a solution - respectively: where to get a working board ?

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Stuntteam
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Joined: 27 Jan 2016, 16:46

Re: RSSI info / provide signal strength

#23 Post by Stuntteam » 06 Apr 2017, 17:36

I ordered from the mentioned links and did not receive a 2.0 but one without any marking.
No rssi signal present.
It is useless to implement this if no one is able to get modules that actually supply the signal.
Opening the metal shielding on the module to connect to a chip pin is not the way to go.
-=# RFLink Gateway Development Team #=-
Introduction: http://www.nemcon.nl/blog2/
Generic Support forum: http://www.esp8266.nu/forum/viewforum.php?f=8

gert3d
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Joined: 12 Nov 2017, 21:46

Re: RSSI info / provide signal strength

#24 Post by gert3d » 12 Nov 2017, 22:43

What would shorting to the ENABLE option do?

pete_l
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Joined: 07 Jul 2018, 08:32

Re: RSSI info / provide signal strength

#25 Post by pete_l » 07 Jul 2018, 09:05

RCcocktail wrote:
10 Feb 2017, 19:04
I looked at the RXB6 board and the chip's RSSI pin is not connected to anything (see attached pic).
I popped the lid off one of my RXB6s. It turns out that pin 14, the RSSI output has a track that runs under the IC to a via and that goes directly to the R7 pad (the pad nearest the crystal, in the picture).
However on my devices, the RSSI isn't much use as a received signal strength indicator. It just seems to be an sample of the input to the data slicer.

The image below shows this. The yellow trace is the logic level output and the blue one underneath is the RSSI output.
rxb6-data-slicer.jpg
rxb6-data-slicer.jpg (189.53 KiB) Viewed 624 times

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