From: Petter Reinholdtsen Date: Fri, 7 Apr 2023 23:43:24 +0000 (+0200) Subject: Generated. X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/commitdiff_plain/38c43407df8370e4374de177f54d1fdef37e3583?hp=7969b0932bf195a38bbcf993b816e8a636ae76e4 Generated. --- diff --git a/blog/archive/2023/03/03.rss b/blog/archive/2023/03/03.rss new file mode 100644 index 0000000000..2d185b32fb --- /dev/null +++ b/blog/archive/2023/03/03.rss @@ -0,0 +1,77 @@ + + + + Petter Reinholdtsen - Entries from March 2023 + Entries from March 2023 + https://people.skolelinux.org/pere/blog/ + + + + rtlsdr-scanner, software defined radio frequency scanner for Linux - nice free software + https://people.skolelinux.org/pere/blog/rtlsdr_scanner__software_defined_radio_frequency_scanner_for_Linux____nice_free_software.html + https://people.skolelinux.org/pere/blog/rtlsdr_scanner__software_defined_radio_frequency_scanner_for_Linux____nice_free_software.html + Tue, 7 Mar 2023 23:10:00 +0100 + <p>Today I finally found time to track down a useful radio frequency +scanner for my software defined radio. Just for fun I tried to locate +the radios used in the areas, and a good start would be to scan all +the frequencies to see what is in use. I've tried to find a useful +program earlier, but ran out of time before I managed to find a useful +tool. This time I was more successful, and after a few false leads I +found a description of +<a href="https://www.kali.org/tools/rtlsdr-scanner/">rtlsdr-scanner +over at the Kali site</a>, and was able to track down +<a href="https://gitlab.com/kalilinux/packages/rtlsdr-scanner.git">the +Kali package git repository</a> to build a deb package for the +scanner. Sadly the package is missing from the Debian project itself, +at least in Debian Bullseye. Two runtime dependencies, +<a href="https://gitlab.com/kalilinux/packages/python-visvis.git">python-visvis</a> +and +<a href="https://gitlab.com/kalilinux/packages/python-rtlsdr.git">python-rtlsdr</a> +had to be built and installed separately. Luckily '<tt>gbp +buildpackage</tt>' handled them just fine and no further packages had +to be manually built. The end result worked out of the box after +installation.</p> + +<p>My initial scans for FM channels worked just fine, so I knew the +scanner was functioning. But when I tried to scan every frequency +from 100 to 1000 MHz, the program stopped unexpectedly near the +completion. After some debugging I discovered USB software radio I +used rejected frequencies above 948 MHz, triggering a unreported +exception breaking the scan. Changing the scan to end at 957 worked +better. I similarly found the lower limit to be around 15, and ended +up with the following full scan:</p> + +<p><a href="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png"><img src="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png" width="100%"></a></p> + +<p>Saving the scan did not work, but exporting it as a CSV file worked +just fine. I ended up with around 477k CVS lines with dB level for +the given frequency.</p> + +<p>The save failure seem to be a missing UTF-8 encoding issue in the +python code. Will see if I can find time to send a patch +<a href="https://github.com/CdeMills/RTLSDR-Scanner/">upstream</a> +later to fix this exception:</p> + +<pre> +Traceback (most recent call last): + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save + save_plot(fullName, self.scanInfo, self.spectrum, self.locations) + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot + handle.write(json.dumps(data, indent=4)) +TypeError: a bytes-like object is required, not 'str' +Traceback (most recent call last): + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save + save_plot(fullName, self.scanInfo, self.spectrum, self.locations) + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot + handle.write(json.dumps(data, indent=4)) +TypeError: a bytes-like object is required, not 'str' +</pre> + +<p>As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> + + + + + diff --git a/blog/archive/2023/03/index.html b/blog/archive/2023/03/index.html new file mode 100644 index 0000000000..b6dbba6851 --- /dev/null +++ b/blog/archive/2023/03/index.html @@ -0,0 +1,657 @@ + + + + + Petter Reinholdtsen: entries from March 2023 + + + + + + +
+

+ Petter Reinholdtsen + +

+ +
+ + +

Entries from March 2023.

+ +
+
+ rtlsdr-scanner, software defined radio frequency scanner for Linux - nice free software +
+
+ 7th March 2023 +
+
+

Today I finally found time to track down a useful radio frequency +scanner for my software defined radio. Just for fun I tried to locate +the radios used in the areas, and a good start would be to scan all +the frequencies to see what is in use. I've tried to find a useful +program earlier, but ran out of time before I managed to find a useful +tool. This time I was more successful, and after a few false leads I +found a description of +rtlsdr-scanner +over at the Kali site, and was able to track down +the +Kali package git repository to build a deb package for the +scanner. Sadly the package is missing from the Debian project itself, +at least in Debian Bullseye. Two runtime dependencies, +python-visvis +and +python-rtlsdr +had to be built and installed separately. Luckily 'gbp +buildpackage' handled them just fine and no further packages had +to be manually built. The end result worked out of the box after +installation.

+ +

My initial scans for FM channels worked just fine, so I knew the +scanner was functioning. But when I tried to scan every frequency +from 100 to 1000 MHz, the program stopped unexpectedly near the +completion. After some debugging I discovered USB software radio I +used rejected frequencies above 948 MHz, triggering a unreported +exception breaking the scan. Changing the scan to end at 957 worked +better. I similarly found the lower limit to be around 15, and ended +up with the following full scan:

+ +

+ +

Saving the scan did not work, but exporting it as a CSV file worked +just fine. I ended up with around 477k CVS lines with dB level for +the given frequency.

+ +

The save failure seem to be a missing UTF-8 encoding issue in the +python code. Will see if I can find time to send a patch +upstream +later to fix this exception:

+ +
+Traceback (most recent call last):
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
+    save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
+    handle.write(json.dumps(data, indent=4))
+TypeError: a bytes-like object is required, not 'str'
+Traceback (most recent call last):
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
+    save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
+    handle.write(json.dumps(data, indent=4))
+TypeError: a bytes-like object is required, not 'str'
+
+ +

As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

+ +
+
+ + + Tags: debian, english, nice free software. + + +
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+ + + diff --git a/blog/archive/2023/04/04.rss b/blog/archive/2023/04/04.rss new file mode 100644 index 0000000000..c3986131e5 --- /dev/null +++ b/blog/archive/2023/04/04.rss @@ -0,0 +1,77 @@ + + + + Petter Reinholdtsen - Entries from April 2023 + Entries from April 2023 + https://people.skolelinux.org/pere/blog/ + + + + rtlsdr-scanner, software defined radio frequency scanner for Linux - nice free software + https://people.skolelinux.org/pere/blog/rtlsdr_scanner__software_defined_radio_frequency_scanner_for_Linux____nice_free_software.html + https://people.skolelinux.org/pere/blog/rtlsdr_scanner__software_defined_radio_frequency_scanner_for_Linux____nice_free_software.html + Fri, 7 Apr 2023 23:10:00 +0200 + <p>Today I finally found time to track down a useful radio frequency +scanner for my software defined radio. Just for fun I tried to locate +the radios used in the areas, and a good start would be to scan all +the frequencies to see what is in use. I've tried to find a useful +program earlier, but ran out of time before I managed to find a useful +tool. This time I was more successful, and after a few false leads I +found a description of +<a href="https://www.kali.org/tools/rtlsdr-scanner/">rtlsdr-scanner +over at the Kali site</a>, and was able to track down +<a href="https://gitlab.com/kalilinux/packages/rtlsdr-scanner.git">the +Kali package git repository</a> to build a deb package for the +scanner. Sadly the package is missing from the Debian project itself, +at least in Debian Bullseye. Two runtime dependencies, +<a href="https://gitlab.com/kalilinux/packages/python-visvis.git">python-visvis</a> +and +<a href="https://gitlab.com/kalilinux/packages/python-rtlsdr.git">python-rtlsdr</a> +had to be built and installed separately. Luckily '<tt>gbp +buildpackage</tt>' handled them just fine and no further packages had +to be manually built. The end result worked out of the box after +installation.</p> + +<p>My initial scans for FM channels worked just fine, so I knew the +scanner was functioning. But when I tried to scan every frequency +from 100 to 1000 MHz, the program stopped unexpectedly near the +completion. After some debugging I discovered USB software radio I +used rejected frequencies above 948 MHz, triggering a unreported +exception breaking the scan. Changing the scan to end at 957 worked +better. I similarly found the lower limit to be around 15, and ended +up with the following full scan:</p> + +<p><a href="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png"><img src="https://people.skolelinux.org/pere/blog/images/2023-04-07-radio-freq-scanning.png" width="100%"></a></p> + +<p>Saving the scan did not work, but exporting it as a CSV file worked +just fine. I ended up with around 477k CVS lines with dB level for +the given frequency.</p> + +<p>The save failure seem to be a missing UTF-8 encoding issue in the +python code. Will see if I can find time to send a patch +<a href="https://github.com/CdeMills/RTLSDR-Scanner/">upstream</a> +later to fix this exception:</p> + +<pre> +Traceback (most recent call last): + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save + save_plot(fullName, self.scanInfo, self.spectrum, self.locations) + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot + handle.write(json.dumps(data, indent=4)) +TypeError: a bytes-like object is required, not 'str' +Traceback (most recent call last): + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save + save_plot(fullName, self.scanInfo, self.spectrum, self.locations) + File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot + handle.write(json.dumps(data, indent=4)) +TypeError: a bytes-like object is required, not 'str' +</pre> + +<p>As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +<b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p> + + + + + diff --git a/blog/archive/2023/04/index.html b/blog/archive/2023/04/index.html new file mode 100644 index 0000000000..24aea9fb1c --- /dev/null +++ b/blog/archive/2023/04/index.html @@ -0,0 +1,657 @@ + + + + + Petter Reinholdtsen: entries from April 2023 + + + + + + +
+

+ Petter Reinholdtsen + +

+ +
+ + +

Entries from April 2023.

+ +
+
+ rtlsdr-scanner, software defined radio frequency scanner for Linux - nice free software +
+
+ 7th April 2023 +
+
+

Today I finally found time to track down a useful radio frequency +scanner for my software defined radio. Just for fun I tried to locate +the radios used in the areas, and a good start would be to scan all +the frequencies to see what is in use. I've tried to find a useful +program earlier, but ran out of time before I managed to find a useful +tool. This time I was more successful, and after a few false leads I +found a description of +rtlsdr-scanner +over at the Kali site, and was able to track down +the +Kali package git repository to build a deb package for the +scanner. Sadly the package is missing from the Debian project itself, +at least in Debian Bullseye. Two runtime dependencies, +python-visvis +and +python-rtlsdr +had to be built and installed separately. Luckily 'gbp +buildpackage' handled them just fine and no further packages had +to be manually built. The end result worked out of the box after +installation.

+ +

My initial scans for FM channels worked just fine, so I knew the +scanner was functioning. But when I tried to scan every frequency +from 100 to 1000 MHz, the program stopped unexpectedly near the +completion. After some debugging I discovered USB software radio I +used rejected frequencies above 948 MHz, triggering a unreported +exception breaking the scan. Changing the scan to end at 957 worked +better. I similarly found the lower limit to be around 15, and ended +up with the following full scan:

+ +

+ +

Saving the scan did not work, but exporting it as a CSV file worked +just fine. I ended up with around 477k CVS lines with dB level for +the given frequency.

+ +

The save failure seem to be a missing UTF-8 encoding issue in the +python code. Will see if I can find time to send a patch +upstream +later to fix this exception:

+ +
+Traceback (most recent call last):
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
+    save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
+    handle.write(json.dumps(data, indent=4))
+TypeError: a bytes-like object is required, not 'str'
+Traceback (most recent call last):
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/main_window.py", line 485, in __on_save
+    save_plot(fullName, self.scanInfo, self.spectrum, self.locations)
+  File "/usr/lib/python3/dist-packages/rtlsdr_scanner/file.py", line 408, in save_plot
+    handle.write(json.dumps(data, indent=4))
+TypeError: a bytes-like object is required, not 'str'
+
+ +

As usual, if you use Bitcoin and want to show your support of my +activities, please send Bitcoin donations to my address +15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

+ +
+
+ + + Tags: debian, english, nice free software. + + +
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+
+ +

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+ +

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