[HN Gopher] AMPKT - Amateur radio packet explorer ___________________________________________________________________ AMPKT - Amateur radio packet explorer Author : hexagonal-sun Score : 30 points Date : 2023-09-21 20:23 UTC (2 hours ago) (HTM) web link (github.com) (TXT) w3m dump (github.com) | hexagonal-sun wrote: | This is a project to connect two Linux machine's network stacks | via the amateur radio bands. It uses Linux's TAP interface to | read & write packets at layer 2 to/from the kernel. QPSK | modulation is used at the RF layer. | | For now experimentation has mainly been done in a Ramsey box. The | next step is to add a callsign field to the QPSK frames so the | data can be legally TX'd. | drmpeg wrote: | You'll like my IP over DVB-T2 test bed using GNU Radio. It uses | the ULE protocol dvbnet driver that's built into Linux. | | Not shown on the diagram is that it also supports IPv6. | | https://www.w6rz.net/ofdm3.png | lobsterslive wrote: | If anyone is looking for a really good place to get started with | SDR, I'd highly recommend the RTL-SDR Blog V3: | | https://www.amazon.com/gp/product/B0BMKB3L47 | cogman10 wrote: | Dumb question (and maybe this isn't legal?) but are there SDR | transceivers/libraries? | | It'd be neat to have a zigbee/zwave hub with my SDR so I could | mix and match some stuff. | _whiteCaps_ wrote: | Yup, lots around. The hint is to look for 'full duplex' SDR. | ajsnigrutin wrote: | Doing zigbee or zwave stuff is a lot easier with zigbee and | zwave than with SDR. Just use homeassistant with something | like zigbee2mqtt, and you can control your LIDL light with an | Ikea light switch and xiaomi movement sensor without any | issues. | cadr wrote: | HackRF One is an option. There are a number of others. | Legality varies by country/frequency/power level. | | Can also make a Raspberry Pi act as a transmitter | (https://github.com/F5OEO/rpitx), which could hit the zwave | frequency but not the zigbee one. (Also, make sure to put a | low pass filter on it.) | mwbajor wrote: | Gnuradio | kunwon1 wrote: | I recently got back into amateur radio with an SDR (listening | only, my license has lapsed and I need to renew it) | | I found that using the FT8 protocol, I can pick up transmissions | from up to ~6000 miles away, using a very cheap magnetic loop | antenna mounted indoors in my apartment. My building is made of | concrete slabs and I was pretty shocked that I was able to | receive such distant transmissions. | | I think I've invested maybe $70 into radio equipment for this | capability. I've listened to a lot of other signal sources, but | so far FT8 is the most interesting. I can run a companion app | that maps out all the contacts, it is pleasing to watch on a nice | slow evening | nvy wrote: | Wow. Can you link to the antenna you use? | | Could you achieve those distances transmitting with the same | antenna, assuming you renewed your license? | bmitch2112 wrote: | FT8 is lots of fun. Even more fun when you go to a park or up a | summit and see how far you can get out and how far you can | hear. | | You don't need very expensive radio equipment to transmit FT8 | so if you do get your licence back it is worth looking into. | | http://qrp-labs.com/qdx.html | lhamil64 wrote: | I got my license about a month ago and ordered a QDX to try | FT8, but they're super back-ordered. The orders page shows | that they're just now fulfilling orders from May. | mzerod wrote: | I have a QPSK & BPSK packet radio link to several other stations | via the QO-100 satellite narrowband transponder, using a couple | of Pluto SDRs and in some cases a mix/match of RTL SDR dongles | and 70cm radios with transverters. | | Only a small group (4 so far) doing it, but we can be heard on | the WEBSDR hosted at Goonhilly Earth station[1] | | Due to small dish sizes on RX (10GHz) we are keeping it simple | and open at 1200 BPSK and QPSK 2400 with IL2P[2][3] for FEC+RS | robustness, and not even close to the 2.7Khz max permitted | bandwidth. | | [1] https://eshail.batc.org.uk/nb/ - 10489630 USB | | [2] https://tarpn.net/t/il2p/il2p.html | | [3] https://eindhoven.space/il2p ___________________________________________________________________ (page generated 2023-09-21 23:01 UTC)