sbts-aru
openwrt
sbts-aru | openwrt | |
---|---|---|
25 | 82 | |
140 | 18,728 | |
- | 2.0% | |
9.4 | 10.0 | |
4 months ago | about 3 hours ago | |
Shell | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
sbts-aru
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Long distance sound localization with the Raspberry Pi
My project, sbts-aru,
https://github.com/hcfman/sbts-aru
uses a GPS to synchronise the time with and then even when running completely disconnected from any network the clocks will be accurate to real time with less than 1 microsecond of error. Typically the system time hovers around 100 ns or less from the real time. And I’ve tested this by triggering interrupts on gpio’s on two devices with the same switch and printing the time.
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How Home Assistant is being used to protect from missile and drone attacks
Nice to see people able to use tech to help reduce/manage their stress/trauma in such horrific situations.
Good point about telegram. As much local control as possible is desirable. Do the text to speech interfaces work offline with the chosen devices ? If so, I’ll likely have a play.
I have a project that might be able to help with your situation. A Raspberry Pi based sound localization system. It’s very accurate. Last weekend I localized an explosion (fireworks) to within 20m from the actual location with 4 recorders. two of which were 3km from each other.
Unlike most ARUs (autonomous recording units) which are based on microcontrollers and need post processing to determine an event start time, the Pi system could be used as the basis for a real time localization system as the system times is sub microsecond accurate.
With likely a small amount of new development and co-operation with your friends you could be alerted in real time when artillery or gunfire is getting close to you. Along with a map location of where it was fired from
My license forbids government use (attaching consequences to the small developer unfriendly cyber resilience act that is stealing from small developers and giving to rich ones) but personal civilian use is just fine.
https://github.com/hcfman/sbts-aru
(PS. I agree on with the sentiments of the above authors about war. It’s sad that our governments instead of putting everything into driving to peace are spending our future climate change defence money on destruction and they are gunning for it with an insane appetite)
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RTK Experiments
Nice article and lovely piece of kit that one from sparkfun. Will likely be getting one next year to further my experiments with gunshot localization, on my Pi-based sound localization platform (https://github.com/hcfman/sbts-aru). Though at the distances I'm using the phone based GNSS seems to be working quite well.
With an RTk GNSS though I could do some experiments with localizing bat calls. I've tested the Pettersson Ultrasonic microphones with my localization platform and that works fine. I suspect that the bat localization I could achieve if my co-ordinates had RTK accuracy would be pretty damned good! But I have to try it to know.
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Going in circles without a real-time clock
Unfortunately a Raspberry Pi is a bit ill suited for production environments. Id recommend an RTC module. Otherwise this might be helpful: https://github.com/hcfman/sbts-aru
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Running a Raspberry Pi with a read-only root filesystem
If you install my sbts-aru project
https://github.com/hcfman/sbts-aru
It will shrink your partitions, add news and install one of these and set up a sub micro second system clock and an audio recorder suitable for sound localization with a single install command.
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2024-03-01 listening in on the neighborhood
I recommend primo EM272 microphone capsules for use with https://github.com/hcfman/sbts-aru. They are high quality, very sensitive with high signal to noise ratio, lauded for nature recording use cases. They can be bought assembled for around 65 euros in the Netherlands. However these capsules are often found in much more expensive equipment.
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Considerations for a long-running Raspberry Pi
My sound localizing Raspberry Pi installs a resilient base system as part of its install.
https://github.com/hcfman/sbts-aru
https://hackaday.com/2023/12/30/localizing-fireworks-launche...
With one command it for all Pi’s for both Raspbian and bookworm it:
* Shrinks the file system (Gee, how does it do that with just one disk ? ;-) )
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Colorado wolf reintroduction to move forward as ranchers' legal effort fails
I have a sound localization project that can help with that
https://github.com/hcfman/sbts-aru
You need to be able to hear the sound from three or more recorders. And normally localization is better within the polygon of microphones but there’s an area of better localizability extending outside of a vertex.
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Acoustic Location and Sound Mirrors
Interesting history!
And while we are in the subject of sound localizing may I take the liberty of introducing my new raspberry pi sound localizing audio recorder.
https://github.com/hcfman/sbts-aru
It installs with one command on all Raspberry Pi versions and synchronizes the system time to less than 1 microsecond of error with a cheap GPS.
With three of these I’ve been able to sound localize the explosions from illegal fireworks to a specific car park from more than 3km away with lots of houses in between.
When I got to the car park I could smell the sulphur from the fireworks.
This will even run on a Raspberry Pi zero running of a battery with a 6 euro neo 7m gps and a 6 euro usb mic.
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AI tool helps ecologists monitor rare birds through their songs
Very nice tool!
So grab a spare Raspberry Pi, a GPS, a cheap USB sound card and a mic and get recording with this Pi based Acoustic Recording Unit
https://github.com/hcfman/sbts-aru
And while you are at it, install 3x or more and localize where the birds are.
openwrt
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Going in circles without a real-time clock
In OpenWrt (Linux distro for routers that often don't have RTC) dnsmasq starts with `--dnssec-no-timecheck` until the ntp client gets a first sync (https://github.com/openwrt/openwrt/commit/5acfe55d7139a52941...)
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The upcoming 10G router upgrade
People are trying to port the new platform to kernel 6.1 right now, see here.
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imminent release of openwrt 23.05
I'm worried that the issue I reported in -rc4 (default gateway route missing) hasn't been fixed. https://github.com/openwrt/openwrt/issues/13598
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Help choosing between two Wireless APs for concrete building
I'm comparing/contrasting two WAPs (NETGEAR WAX220 and NETGEAR WAX620) which has or is about to have OpenWrt support.
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Attended Sysupgrade - Target Transition
Since commit the target has changed from ipq807x/generic to qualcommax/ipq807x.
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Meraki MX65 - Cannot get the switch to work with 23.05
I got 22.03 to work by doing the modification listed in this repo: https://github.com/openwrt/openwrt/pull/3996/commits
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How to go about updating openwrt
https://github.com/openwrt/openwrt/releasesSearch for mvebu
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I virtualize OpenWRT in Harvester HCI, and it was a long story...
# RTL8125 uses kmod-r8169, and I219-LM uses kmod-e1000. # The below are drivers bundled in the OpenWRT x86 image. # Source: https://github.com/openwrt/openwrt/blob/3556455f040341099a6563968a6e9e8c22c0847e/target/linux/x86/image/64.mk#L6 DEVICE_PACKAGES += \ kmod-amazon-ena kmod-amd-xgbe kmod-bnx2 kmod-e1000e kmod-e1000 \ kmod-forcedeth kmod-fs-vfat kmod-igb kmod-igc kmod-ixgbe kmod-r8169 \ kmod-tg3
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Suggestions for best DD-WRT router for use as a wired backhaul mesh setup
I suspect that's one of the reasons why people contribute a lot more to OpenWRT, because they can simply go into Github fork, PR and discuss things. https://github.com/openwrt/openwrt/pulls
- NanoPi R4S Users
What are some alternatives?
al-ahli-hospital-blast
mwlwifi - mac80211 driver for the Marvell 88W8864 802.11ac chip
BirdNET-Pi - A realtime acoustic bird classification system for the Raspberry Pi 4B, 3B+, and 0W2 built on the TFLite version of BirdNET.
Pi-hole - A black hole for Internet advertisements
Bitgrid - Bitgrid - a new model of computation
multicast-relay - Relay multicast and broadcast packets between interfaces.
running_page - Make your own running home page
Divested-WRT - Configs and patches for Divested-WRT
random-ideas - random ideas
asuswrt-merlin.ng - Third party firmware for Asus routers (newer codebase)
logseq-sync - An open-source Logseq Sync backend implementation
openwrt-r8168 - Realtek RTL8168 Driver for Openwrt