ZEPASSD is a software defined radio (SDR) agent for capturing nearby E-Z Pass metadata.
There are a number of third-party dependencies for ZEPASSD.
- boost.program-options
- boost.crc
- boost.circular-buffer
- libfftw3
- libuhd 3.9.5 or later
Clone the repo, install the above dependencies, and simply run make.
Usage: ./zepassd {options} [output filename]
Options:
-h [ --help ] Get some help (this screen)
-d [ --device ] arg USRP device ID to use
-c [ --center ] arg (=915750000) Center frequency
-T [ --tx-gain ] arg (=75) Transmit gain
-t [ --tx-port ] arg (=A:A) Transmit port on USRP
-A [ --tx-ant ] arg (=TX/RX) Transmit antenna on specified USRP TX port
-R [ --rx-gain ] arg (=75) Receive gain
-r [ --rx-port ] arg (=A:A) Receive port on USRP
-a [ --rx-ant ] arg (=RX2) Receive antenna on the specified USRP RX
port
-P [ --pulse-len ] arg (=20) Length of activation pulse, in microseconds
--gps-pps Use the GPS PPS source and synchronize local
time
-p [ --pulse-spacing ] arg (=25) Pulse interval, in milliseconds
-m [ --max-age ] arg (=30) Maximum stale pass age, in seconds
For example:
./zepassd --device "serial=F00FC7C8" --tx-port "A:A" --rx-port "A:A" --tx-gain 87 --rx-gain 85 -p 20 foobar
will start ZEPASSD on the specified USRP, on the given TX/RX ports, with the
specified gains, a 20ms interval between activations, and will write the
outputs to a file named foobar.
ZEPASSD will work with most radios that support UHD (i.e. USRPs). It relies on the event triggering in hardware that the USRP supports. There are other radios (such as LimeSDR?) that could offer the same capabilities.
ZEPASSD is licensed under the GPLv3 or later.
ZEPASSD is Copyright (c) 2018 Phil Vachon You can reach him at phil@security-embedded.com