Raspberry Pi Digital Police Scanner

Description

This is a Raspberry Pi Digital Police Scanner made with a Raspberry Pi 3B+. It employes the use of an RTL-SDR Dongle. The software is GQRX paired with DSD 1.7.0. The unit auto-starts with a startup script and xdtool for sending keystrokes to GQRX and the terminal shell. The script is ephemeral on boot up. Analog audio is selected. The screen is a touchscreen TFT. The on screen keyboard is extremely useful, its called Onboard and installs to universal access. The display can be flipped upside down if you desire to fit the USB dongle on the otherside. Im sorry about the video quality, I can upload some better ones if requested.Note: There are several scripts avalible for GQRX to scan frequencies as desired.
Video:
https://youtu.be/O4FQ0oua5o8

***There is an update for this project using OP25 which works better. See the main projects page.***

https://hackaday.io/project/181529-raspberry-pi-op25

Just for reference on the LCD Screen:
3.5" touch screen:
Part# MP13501
https://www.waveshare.com/3.5inch-rpi-lcd-a.htm
-------------------
Commands to terminal
sudo ./LCD35-show
/\ will turn the screen on every time powered on
sudo ./LCD-hdmi
/\ will turn off the LCD screen and revert back to HDMI

-Rotation-

cd LCD-show/
sudo ./rotate.sh 90

DSD 1.7 is available at:

https://github.com/szechyjs/dsd

see:

https://github-wiki-see.page/m/szechyjs/dsd/wiki/Installation

There are several rtl-sdr dongles available in several places:

https://www.walmart.com/ip/Clearance-USB2-0-DAB-DVB-T-RTL2832U-R820T2-RTL-SDR-SDR-Dongle-Stick-Digital-TV-Tuner-Remote-Infrared-Receiver-Antenna-blackFor-Electronics-Accessorie/128706250?wmlspartner=wlpa&selectedSellerId=101062873

Or:

www.ebay.com/itm/254760439635

Is the one that I use.

***There is an update for this project using OP25. See the main projects page.***

https://hackaday.io/project/181529-raspberry-pi-op25

Files

gqr.sh

This script can be saved to the desktop or invoked on startup. When you execute from the desktop, select Execute, not Execute in Terminal. If we fail, adjust the sleep timing and make sure that only the Audio and Main toolbar are visible as xdtool is only using those to start everything properly.

x-sh - 809.00 bytes - 11/24/2020 at 05:14

Download

gqrx.desktop

This just runs gqrx

desktop - 174.00 bytes - 11/24/2020 at 05:12

Download

Discussions

rnsi wrote 01/08/2021 at 02:50

I've used a script from pihome with success to shrink RPi images:

https://github.com/mikerr/pihome/blob/master/resizeimage.pl

Are you sure? yes | no

Brian wrote 12/30/2020 at 16:02

The SD image is 16GB, I can perhaps upload this to my server and provide a link.

Are you sure? yes | no

rnsi wrote 12/31/2020 at 05:22

Yes, please. I'd like that.

Are you sure? yes | no

rnsi wrote 12/30/2020 at 15:10

Any chance you could upload your SD image?

Are you sure? yes | no

Brian wrote 11/24/2020 at 05:05

I will provide you the scripts if you want. Yes

Are you sure? yes | no

rnsi wrote 11/22/2020 at 02:44

Will you provide the scripts? Or the RPi SD image?

Are you sure? yes | no

Raspberry Pi Digital Police Scanner

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Description

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Files

gqr.sh

gqrx.desktop

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