xnk / pacific-tpms Goto Github PK

Thanks for your efforts. I am playing with your code and getting following error. any thoughts?
`./tpmsrecv.py
linux; GNU C++ version 7.2.1 20171224; Boost_106600; UHD_003.010.002.000-0-unknown

gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.11
built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
Invalid sample rate: 96000 Hz
Traceback (most recent call last):
File "./tpmsrecv.py", line 213, in
main()
File "./tpmsrecv.py", line 208, in main
tb = top_block_cls()
File "./tpmsrecv.py", line 160, in init
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(self.decim, (firdes.low_pass(1, throttle_rate, 180000, 20000, firdes.WIN_HAMMING, 6.76)), self.freqadj, throttle_rate)
File "/usr/lib/python2.7/site-packages/gnuradio/filter/filter_swig.py", line 139, in low_pass
return _filter_swig.firdes_low_pass(*args, **kwargs)
RuntimeError: firdes check failed: 0 < fa <= sampling_freq / 2
`

bitstream = '00000000000000001111110' + differential_manchester_encode('1'+payload+crc_bits+'1') + '000000'

I'm curious, how come you have the preamble not encoded?

Hi,

This is not a issue. I just try to find a way to send LF signal to activate the TPMS sensor out of tire. I have four pacific PMV-107J sensors out of tire. But they don't send signal if they're not in the tire. I know some TPMS scanners have a way to scan TPMS sensor. Could we send the signal as TPMS scanners do?

Thanks for your code, I'm doing thesis research on wireless vulnerabilities in vehicles and it's been helpful. I'm attempting to spoof my 2020 Toyota Tacoma's tpms messages, but as you can see in the picture below the id field is either 8 hex digits long, or maybe just has "d" as a prefix. (I'm using two HackRFs, one listening with RTL_433, and the other transmitting your code) When I attempt to add the additional character to your code, I do not receive anything on RTL_433, which I'm assuming is because the payload is very length-dependent as far as the CRC. Is there anyway to change this prefix from "0" to "d", or just add the additional character into the id field? Thanks so much for your help!

TPMS Messages received from 2020 Toyota Tacoma

TPMS Messages generated by the tpmsxmit.py code

Official information about this FCC ID PAXPMV107J says that Frequency Range is 314.98 MHz, but not 315.98MHz as you mentioned in README.md. Using radio receiver I can confirm, that every 90 seconds on this frequency I can see short signal.

https://fccid.io/PAXPMV107J