(Possibly) Not Working sub-GHz radio

Sub-GHz
#1

Hello! I emailed support and was directed to post here. I don’t think the sub-GHz radio is working on my FlipperZero. All other functions appear to be working, but any time I try to use the frequency analyzer, I get nothing.

I wasn’t sure if it was working or not, but I tested it with my dad’s Tesla charger which is (infamously?) well-known at this point. Nothing on 315MHz, even with the Flipper next to the charger, the charging door, nothing. Nothing when trying to use Read, Read RAW, or the Frequency Analyzer. I have tried with various garage door remotes… anything I can think of that is in the range for FlipperZero to detect, but it always shows 000.000MHz. It has been this way for a few firmware revisions; I managed to detect my garage door opener once, and exactly once. Has not worked since. Currently my Flipper has 0.61.1 flashed.

I know replay of rolling codes is unsupported, but I thought reading/detecting those radio frequencies was supported. Is there some way I can test for sure to see if it is my Flipper?

HARDWARE 12.F7B9C6
RADIO FW 1.13.3 LITE

Thanks!

#2

Did you try sending a pre-recorded Tesla charger signal to see if it works?

#3

Got a copy of the signal and tested it. Sending works, but I can’t get anything to show up on the Frequency Analyzer.

#4

The frequency analyzer has very low sensitivity (intentionally, to filter out noise). Bring the signal source right next to the left side of the flipper (where the antenna is located) for it to work.

#5

I thought mine was broken as well, had to put the TX source super close for it to register on the analyzer. I was able to see the signal better by just going into raw record and setting it to the freq I suspect it was in.

#6

The frequency analyzer has intentionally been set to a low sensitivity to filter out noise

#7

Okay! I don’t know if anything changed in firmware revisions, but if the bottom edge of Flipper is literally touching the transmitter, it gets a reading. (Even two inches away was too far) I guess it’s just filtering.

Transmission works from further away.

Thanks!