"rx" never prints any received signal, "rxraw" does

[OevreFlataeker]

I am trying to receive some signals with cc1101-tool without success, that I've previously received well on a FlipperZero (433 MHz) as well as in an esphome setup on an ESP32 with CC1101 in 868MHz mode. I am using a Wemos D1 V4 (ESP8266 based) with sketch cc1101-tool-esp8266-wifi.ino for my tests.

I know that the 433MHz signal can be received with:

setmodulation 2
setmhz 433.92
setdeviation 15
setchsp 199.95
setrxbw 812.50
setdrate 2.4
setsyncmode 4

(in this case it's a garage door opener).

In "rx" mode I never get any result.

The "rxraw" buf looks like this (pressing the garage door opener for multiple seconds) (Please copy to text editor to see it in multiline)

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

How can I print this?

Using a STM32WL33C1 with STM32CubeWISE-Radioexplorer I can also receive the 433 MHz well with the same parameters as given above.

Then I try to receive a very slow 868.35 MHz signal which is send by my power measure device:
I never get ANY result, not even in rxraw mode with an 868 MHz antenna.

setmodulation 2
setmhz 868.35
setdeviation 5
setrxbw 350
setdrate 1
setcrc 0
setpktformat 0
setlengthconfig 0
setpacketlength 16
setmanchester 0

Even in rxraw mode I only get all 0x0000000 buffer.

My first question would be: How can I make cc1101-tool print the 433 MHz buffer without sniffing "raw"?

[OevreFlataeker]

Turns out, it is not related to the micro where I run the tool on. I got it working on my Arduino Nano as well (see #49) but the same behavior is observed here. "rx" never prints anything for me. What do I need to configure so rx considers something like

000000000003F803FFE0001F007FFC0003F00FFF80007E01FFF8000FC03FFF0001F803FFE0003F807FFC0007F00FFF80007E01FFF8000FC03FFF0001F803FFE0003F80FFFC0007E00FFF8000FE01FFF0001FC03FFF00FFF807FFE0003F00FFFC0007E00FFF8000FE00

as a valid transmission?

[mcore1976]

Hi. The "RX" / "TX" commands are assuming CC1101 is working in packet mode. For this you need to configure preamble, sync-word and other packet related parameters like address of the peer, etc... It is not so easy and would require some reverse-engineering in URH ( Universal Radio Hacker ).

In short. CC1101 Packet Mode is only compatible with other CC1101 boards..

[OevreFlataeker]

Thank you! Figured this out by pointing ChatGPT to the sources of culfw and the FlipperZero SubGHz firmware - that is unless it hallucinated ;-) I will experiment a bit with the asynchronous mode vs packet mode to better understand how this works