Is there a minimum pulse width for reading signals? Most subghz signals I’ve encountered have pulses greater than 100 microseconds. I have been unable to get a good capture of signals less than 50 microseconds, though.
Right now I’m working on decoding the Encoder Reader Transmitter (ERT) Automatic Meter Reading (AMR) signal which has pulse widths of 30 microseconds.
It is OOK and the default AM270 and AM650 didn’t work. I suspected that was because the CC1101 data rate configuration on those profiles was too low so I created custom profiles with the setting_user file with data rates over 100kbps and still can’t capture pulses less than 50 us. Interestingly I am able to transmit 30 us pulses.
The CC1101 says it can go up to 600kbps which should be plenty fast for this signal. Is there something else in the Flipper implementation limiting my read raw capture resolution (or am I just doing something wrong)?