tag:blogger.com,1999:blog-5096278891763426276.post1381054539325234116..comments2024-03-28T18:37:12.987+02:00Comments on absorptions: The burger pagerOona Räisänenhttp://www.blogger.com/profile/08764440174916554983noreply@blogger.comBlogger32125tag:blogger.com,1999:blog-5096278891763426276.post-23032173977177929362022-02-15T23:11:14.537+02:002022-02-15T23:11:14.537+02:00It's even easier than this. Record all of the ...It's even easier than this. Record all of the signals to a laptop, then simply play them back thru the transmitter audio in. No pocsag software required.hoverthingshttps://www.blogger.com/profile/17567948409188922597noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-71389292349890850952021-04-28T03:53:32.263+03:002021-04-28T03:53:32.263+03:00It is 2021 now, a check on google shows you can ge...It is 2021 now, a check on google shows you can get them from walmart via their mail service. About $16.00 american.User 13http://ainggotnourl.comnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-73841618341668369412017-08-12T20:16:15.407+03:002017-08-12T20:16:15.407+03:00A non-optimal length antenna will still work, as a...A non-optimal length antenna will still work, as a general principle, it'll just be less efficient. So less signal recieved / transmitted compared to an optimal one. <br /><br />I dunno if Oona's married, but have you tried asking Jeri Ellsworth? You're behind me (and a million other geeks) in the queue. <br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-7637511349675493892016-12-29T18:04:07.765+02:002016-12-29T18:04:07.765+02:00Could you please post the code? Thanks!Could you please post the code? Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-28025475178249817332016-02-06T20:53:07.432+02:002016-02-06T20:53:07.432+02:00Hi Oona - if you (or anyone else) wants to *transm...Hi Oona - if you (or anyone else) wants to *transmit* POCSAG signals over a short distance (however far 100mW will go at UHF) this can be done using an Arduino and RF22 shield... A ham in Belgium has already written most of the code, I have posted on my blog how to get 1200 and 2400 bps transmissions as well as 512 bps..<br /><br />http://ratcotel.net/?p=376Alex The Engineer - Ipswich UKhttp://www.ratcotel.netnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-45247282000748087182015-01-23T17:30:57.761+02:002015-01-23T17:30:57.761+02:00> The next question is inevitable. How much hav...> The next question is inevitable. How much havoc would ensue if someone were to loop through all 262,144 possible addresses and send a message like this? I'll leave it as hypothetical.<br /><br />Hahaha! I like the way you think!Juan Castrohttps://www.blogger.com/profile/17460907797734424386noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-60368726658799139072014-05-28T16:12:41.325+03:002014-05-28T16:12:41.325+03:00Get one with RTL2832U.Get one with RTL2832U.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-64394510989512188762014-02-09T08:40:52.171+02:002014-02-09T08:40:52.171+02:00No. We've had these in Australia - they are on...No. We've had these in Australia - they are only used to signify, usually in a pub bistro/cafe context when you meal is ready.<br /><br />The active state of the buzzer is physically unrelated to process of perparing your food, or even in your incorrect example, the physical occupation states of a table. Simply put, the buzzer doesn't empty tables or cook food, it's just a digital equivalent of somebody yelling from the counter "Order 17? Works burger with extra beetroot", if your buzzer is going off, the cook isn't just going to hand you a plate of half cooked food.Anonymoushttps://www.blogger.com/profile/01807861096694528481noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-14277338068175110142014-02-02T22:55:46.296+02:002014-02-02T22:55:46.296+02:00Hi! Complete noob on radio. Your blog has some of ...Hi! Complete noob on radio. Your blog has some of the nicest reverse engineering i've seen on the radio-side, and you got me curious to get myself a RTL-SDR. HackRF seems to be released to the general public pretty soon and when it is i will for sure get one, but until then i want to get my hands dirty. Can you advice on what dongle to get? On the topic of antennas i see a lot of the dongles comes with telescope-antennas. How are these simple antennas able to read all these frequencies? I was under the impression that antennas are measured and cut according to divisions by 2, making the best antenna for 27mhz 4.5 meters, 2.25 meters and so on.., or does is this only important when sending a signal? Last question: Are you married?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-66775278925227256792014-02-01T09:57:34.188+02:002014-02-01T09:57:34.188+02:00Slightly more beneficial: figure out your own coas...Slightly more beneficial: figure out your own coaster's address and page it when you feel you've waited long enough for a table.Unknownhttps://www.blogger.com/profile/11497498338656872488noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-61904244927928312042014-01-18T11:17:21.205+02:002014-01-18T11:17:21.205+02:00I think I started by reading the technical specifi...I think I started by reading the technical specifications of the various protocols I wanted to decode. An important guide along the way was <a href="http://dspguide.com/" rel="nofollow">The Scientist and Engineer's Guide to Digital Signal Processing</a>. Also, navigating Wikipedia articles about modulation methods and studying for a ham license helped.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-70327089453010275372014-01-18T02:18:59.840+02:002014-01-18T02:18:59.840+02:00what kind of books do you recommend to be able to ...what kind of books do you recommend to be able to decode radio signals? I have been playing around with rtl-sdr for a while listening on different signals. But i don't have the fundamental knowledge on how radio communication works and how i should be able to write my own code for this particular field. Thank you for a wonderful site and talks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-64190230315948155692014-01-15T02:01:27.009+02:002014-01-15T02:01:27.009+02:00There are only a few dozen pagers in a typical res...There are only a few dozen pagers in a typical restaurant. Leave a laptop in your bag decoding the signals for the duration of your meal and you'd collect enough of them to cause some trouble. I never tried decoding, but I can pick up the pager signals from the burger shop down the street from the discone scanner antenna on my house. <br /><br />I expect the novelty of watching poor saps walk up the the counter to collect their food that isn't ready yet would wear off quickly but it would be fun to try. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-30497248539221872032013-11-30T08:31:52.481+02:002013-11-30T08:31:52.481+02:00I wrote it myself.I wrote it myself.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-34047063906509139042013-11-30T07:39:55.387+02:002013-11-30T07:39:55.387+02:00What software was used to decode the POCSAG/ binar...What software was used to decode the POCSAG/ binary FSK?Machinegeekhttp://machinegeek.comnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-72663520646804106612013-11-27T15:13:10.323+02:002013-11-27T15:13:10.323+02:00Do you have any recommendations for any specific R...Do you have any recommendations for any specific RTL2832U-based device? I would like to have one but there is a shitloads of those available on ebay..Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-26685544676555122642013-11-05T08:57:46.585+02:002013-11-05T08:57:46.585+02:00I used a VHF antenna off an old railway radio actu...I used a VHF antenna off an old railway radio actually. But once you're inside the restaurant, the RTL's own DVB antenna should be fine too.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-20714438794789491952013-11-05T03:33:29.487+02:002013-11-05T03:33:29.487+02:00What did you use for an antenna?What did you use for an antenna?Shawnesyhttps://www.blogger.com/profile/06089544322801486961noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-13484680759987074702013-09-25T01:48:49.292+03:002013-09-25T01:48:49.292+03:00If you were devious a more efficient approach woul...If you were devious a more efficient approach would be to sit in a car outside the venue with a yagi pointed at the bistro and snarf out all the POCSAG codes in use.Tim the Enchanterhttps://www.blogger.com/profile/13312812983657968130noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-11562718556159495982013-09-22T12:40:30.970+03:002013-09-22T12:40:30.970+03:00I've actually tried this once just to see if i...I've actually tried this once just to see if it can be done. The person at the cashier was confused why my beeper was beeping when my food clearly wasn't ready!liwei!https://www.blogger.com/profile/18232615459729655110noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-89035934760610965952013-09-22T12:00:32.886+03:002013-09-22T12:00:32.886+03:00Often I would also have my notebook. But it also w...Often I would also have my notebook. But it also works on some Android devices - see SDR Touch.Oona Räisänenhttps://www.blogger.com/profile/08764440174916554983noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-1202100558669024012013-09-21T11:19:38.407+03:002013-09-21T11:19:38.407+03:00"For this kind of situations I often carry my..."For this kind of situations I often carry my RTL2832U-based television receiver dongle with me (the so-called rtl-sdr)"<br /><br />I got a good laugh from that too:) Anyway, keep up the great blog. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-26582039527162409882013-09-21T06:44:14.655+03:002013-09-21T06:44:14.655+03:00posts like these are why I have this blog in my rs...posts like these are why I have this blog in my rss reader. awesome!Anonymoushttps://www.blogger.com/profile/12526000773007748797noreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-65618559243325106342013-09-20T10:59:58.742+03:002013-09-20T10:59:58.742+03:00>For this kind of situations I often carry my R...>For this kind of situations I often carry my RTL2832U-based television receiver dongle with me (the so-called rtl-sdr)<br /><br />Do you also carry a notebook with you or how do you use the rtl-sdr dongle? And which software and OS do you use?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5096278891763426276.post-81662658704147723672013-09-18T15:09:43.912+03:002013-09-18T15:09:43.912+03:00I recently visited Helsinki to visit my partner...I recently visited Helsinki to visit my partner's parents, and we saw them there.Anonymousnoreply@blogger.com