[{"data":1,"prerenderedAt":481},["ShallowReactive",2],{"project-43551767":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":35,"aspects":36,"strip":43,"post_text":46,"what":47,"said":92,"maker_in_thread":200,"shape":211,"grid":215,"attempts":442,"same_week":443,"maker_shows":33,"maker_hidden":473,"reader_version":474,"card":475},"43551767","Igatha","Offline SOS signaling+recovery app for disasters\u002Fwars","title","Show HN: Offline SOS signaling+recovery app for disasters\u002Fwars","https:\u002F\u002Fgithub.com\u002Fnizarmah\u002Figatha","github.com","nizarmah",1743544712,2025,163,89,429,3837,12,"notable","infrastructure","emergency signaling","mobile_app",[24,25,26,27],"disaster response","offline sos","ble beacon","rubble rescue","curious",0.061,{"positive":31,"neutral":32,"mixed":33,"critical":34},7,27,1,6,41,{"idea":37,"performance":39,"design":41,"execution":42},{"positive":38,"critical":34},4,{"positive":40,"critical":40},0,{"positive":40,"critical":40},{"positive":33,"critical":40},[33,33,33,44,40,44,40,40,45,44,33,44,45,44,40,40,40,33,44,44,33,40,45,45,44,45,44,44,44,44,44,44,45,44,44,45,44,44,44,44],3,5,"A couple of months ago, I built this app to help identify people stuck under rubble.\n\nFirst responders have awesome tools. But in tough situations, even common folks need to help.\n\nAfter what happened in Myanmar, we need something like this that works properly.\n\nIt has only been tested in controlled environments. It can also be improved; I know BLE is not _that_ effective under rubble.\n\nIf you have any feedback or can contribute, don't hold back.",{"problem":48,"audience":54,"pricing":66,"motivation":67,"time_to_build":74,"stack":78,"openness":89,"stage":90,"team_size":91},{"value":49,"source":50,"evidence":51},"Helping locate people trapped under rubble after disasters when networks are down","maker",[52],{"id":53},"post",{"value":55,"source":56,"evidence":57},"Common folks nearby during disasters, and possibly industrial workers and firefighters","commenter",[58,62],{"id":59,"by":60,"text":61},"43554609","Sakthimm","My friend works at one of the world's largest steel plants and recently he was discussing some ideas with me about solving the problem of people disappearing during inspections…",{"id":63,"by":64,"text":65},"43552544","dimal","This is great. That said, I think that unless Apple and Google install something like this by default, it won’t get much traction, because you can’t download the app when you…",null,{"value":68,"source":50,"evidence":69},"Help people trapped in disasters like Myanmar, where first responders may be overwhelmed",[70,71],{"id":53},{"id":72,"by":11,"text":73},"43554997","This is pretty cool! I need to learn more about both. I imagine such fancier tools would be less available among common folks, and more among first responders. NASA already has…",{"value":75,"source":50,"evidence":76},"A couple of months",[77],{"id":53},[79,85],{"value":80,"source":50,"evidence":81},"Bluetooth Low Energy",[82],{"id":83,"by":11,"text":84},"43552356","1. Disaster detection is a user toggle-able option that uses motion sensors to detect extreme shifts. 2. SOS signal is a BLE broadcast along with an alarm-like audio (generated…",{"value":86,"source":50,"evidence":87},"Generated sine-wave audio alarm",[88],{"id":83,"by":11,"text":84},"open_source","prototype","unknown",{"praise":93,"objections":106,"requests":129,"questions":159,"alternatives":175},[94,102],{"value":95,"source":56,"evidence":96},"Good idea that makes use of technology for disasters",[97,101],{"id":98,"by":99,"text":100},"43552411","keyle","This is awesome. Technology put to good use. Can voice be transferred? Message be recorded and rebroadcasted? What about making the device vibrate SOS pulses. The person at stake…",{"id":98,"by":99,"text":100},{"value":103,"source":56,"evidence":104},"Offline disaster tools are needed, as shown by Hurricane Helene",[105],{"id":63,"by":64,"text":65},[107,118,122],{"value":108,"source":56,"evidence":109},"BLE signals are weak through rubble; physics limits range",[110,114],{"id":111,"by":112,"text":113},"43553008","eddythompson80","> It can also be improved; I know BLE is not _that_ effective under rubble. It's a tough problem to solve because you're up against the laws of physics and the very boring (and…",{"id":115,"by":116,"text":117},"43552372","neuroelectron","Do smart phones support \"LE Long Range (Coded PHY, S=8)\" Perplexity says it can transmit up to a 1km in ideal conditions. Otherwise it's 10-30m indoor.",{"value":119,"source":56,"evidence":120},"Phones must have the app installed beforehand, so adoption is hard",[121],{"id":63,"by":64,"text":65},{"value":123,"source":56,"evidence":124},"Background disaster detection could chirp noise unexpectedly",[125],{"id":126,"by":127,"text":128},"43552300","daveguy","Okay, what is \"disaster detection\"? I'd really prefer my phone not chirp noise over Bluetooth channels if I don't notice and respond to a notification in time. Would be nice if…",[130,138,144,151],{"value":131,"source":56,"evidence":132},"Vibration or tapping-based signaling",[133,134],{"id":98,"by":99,"text":100},{"id":135,"by":136,"text":137},"43555174","rapjr9","BLE might be useful above ground in some situations, e.g., a person who is unable to stand and is located in a large field of tall grass, or someone who is hiding from an…",{"value":139,"source":50,"evidence":140},"Background listening with notifications",[141],{"id":142,"by":11,"text":143},"43552673","People, nearby, with the app installed who open it during a disaster. That's why it needs to be in more hands. Ideally, there would be an option to have your phone \"listen\" in…",{"value":145,"source":56,"evidence":146},"Loud sound button with volume control",[147],{"id":148,"by":149,"text":150},"43554760","lormayna","It would be nice to have a button to play a loud sound. A common use case is to play it when you are under ruin and you hear rescuers close to you. If the rescuers heard a loud…",{"value":152,"source":56,"evidence":153},"Embed the feature at OS or hardware level",[154,158],{"id":155,"by":156,"text":157},"43553169","tonyhart7","this is good but ideally people want this app\u002Fplatform to be embedded in hardware\u002FOS level",{"id":63,"by":64,"text":65},[160,167,171],{"value":161,"source":56,"evidence":162},"Who receives the SOS signal?",[163],{"id":164,"by":165,"text":166},"43552637","weikju","What's not clear to me is, who's listening? Like if I install this app and I get buried under a crumbled building and send out the SOS signal... Are there any receivers???",{"value":168,"source":56,"evidence":169},"Can voice be transferred or rebroadcast?",[170],{"id":98,"by":99,"text":100},{"value":172,"source":56,"evidence":173},"Does LE Long Range work on smartphones?",[174],{"id":115,"by":116,"text":117},[176,183,193],{"value":177,"source":56,"evidence":178},"Meshtastic and LoRa devices",[179],{"id":180,"by":181,"text":182},"43552585","pjs_","This is cool! I have been really enjoying using Meshtastic and LoRa lately. It feels like a blessed relief from the toxic swamp of the regular internet. I love pinging stupid…",{"value":184,"source":56,"evidence":185},"Apple Connect to a Satellite and Android satellite emergency services",[186,189],{"id":187,"by":11,"text":188},"43552581","This is something I needed to hear for months. Thank you. I'll work towards that. I'll need to figure out how to prove the poc is useful. Apple's \"Connect to a Satellite\" touches…",{"id":190,"by":191,"text":192},"43556042","INTPenis","Satellite based emergency services are already enabled in recent Android phones. I know that only because recently I have been getting a notification on my Pixel 9 Pro that…",{"value":194,"source":56,"evidence":195},"Avalanche beacons",[196],{"id":197,"by":198,"text":199},"43553246","boc","Check out the tech behind avalanche beacons for some inspiration. They are meant to locate bodies buried deep in snow debris fields within a meter precision. You have to also…",{"comments":201,"answered":202,"key":203},29,11,[204,207,210],{"id":205,"text":206},"43553065","Thanks for the amazing breakdown. That means LoRa and cellular network won't help either... That's good to know. Yeah, sound seems like a good option. There's two points I'm…",{"id":208,"text":209},"43554916","TIL about Antenna Theory\u002FDesign. Yeah the human element is the strictest here. From the little research\u002Fthinking I did, BLE felt like the most \"commonly available\" tool we have.…",{"id":72,"text":73},{"commenters":212,"max_depth":34,"maker_replies":201,"first_comment_mins":213,"lifespan_hours":214},46,74,120,[216,218,222,225,228,230,232,233,236,240,241,243,245,249,251,254,256,258,260,261,264,267,270,272,274,277,281,283,287,289,292,294,296,300,302,304,306,309,310,311,314,316,319,321,322,324,325,327,329,331,333,337,339,341,344,346,348,351,354,356,358,361,363,365,369,371,375,377,380,381,384,386,389,391,395,397,399,403,405,409,412,416,420,422,426,429,433,435,438],[111,40,33,217,112,40],"project\u002Fcritical\u002Fidea",[219,40,44,220,221,40],"43553050","project\u002Fneutral\u002Fidea","pizzly",[223,40,44,220,224,40],"43554219","genewitch",[226,40,33,217,227,40],"43605371","trod1234",[205,40,40,229,11,33],"maker\u002Fneutral\u002Fidea",[231,40,33,217,112,40],"43553229",[208,40,40,229,11,33],[234,40,44,220,235,40],"43566447","Cthulhu_",[237,40,40,238,239,40],"43553294","other\u002Fneutral\u002Fnone","westurner",[72,40,40,229,11,33],[242,40,40,238,239,40],"43556519",[244,40,40,238,227,40],"43605364",[246,40,44,247,248,40],"43553736","project\u002Fneutral\u002Fperformance","EdwardDiego",[250,40,40,238,224,40],"43554202",[252,40,40,238,253,40],"43555096","subscribed",[255,40,40,238,224,40],"43557874",[257,40,40,238,112,40],"43559142",[63,33,45,259,64,40],"project\u002Fpositive\u002Fidea",[187,33,40,229,11,33],[262,33,44,220,263,40],"43553000","sneak",[265,33,40,238,266,40],"43553222","HeatrayEnjoyer",[268,33,44,220,269,40],"43555824","thenthenthen",[59,271,44,220,60,40],2,[273,271,33,217,253,40],"43554751",[275,271,40,238,276,40],"43554825","defrost",[278,271,44,279,280,40],"43554908","project\u002Fneutral\u002Fnone","6footgeek",[282,271,40,229,11,33],"43555020",[284,271,45,285,286,40],"43557422","maker\u002Fpositive\u002Fnone","financetechbro",[288,271,40,285,11,33],"43557527",[290,271,44,220,291,40],"43558954","toomuchtodo",[180,44,40,293,181,40],"other\u002Fpositive\u002Fnone",[295,44,40,285,11,33],"43552684",[297,44,40,298,299,40],"43553044","commenter\u002Fneutral\u002Fnone","noman-land",[301,44,40,298,224,40],"43554223",[303,44,40,238,299,40],"43558402",[305,44,40,238,224,40],"43561090",[307,44,40,238,308,40],"43554280","Its_Padar",[164,38,44,220,165,40],[142,38,40,229,11,33],[312,38,33,217,313,40],"43552829","SlavikCA",[315,38,40,229,11,33],"43552865",[317,38,44,220,318,40],"43552886","tough",[320,38,40,229,11,33],"43552935",[197,45,44,220,198,40],[323,45,40,238,112,40],"43553356",[190,34,33,217,191,40],[326,34,40,229,11,33],"43556156",[328,31,40,238,239,40],"43554352",[135,330,44,220,136,40],8,[332,330,40,229,11,33],"43555367",[334,335,45,259,336,40],"43553782",9,"np1810",[98,338,45,259,99,40],10,[340,338,40,229,11,33],"43552427",[342,338,44,220,343,40],"43554879","ioleo",[345,338,40,229,11,33],"43555105",[347,202,45,259,221,40],"43552913",[349,202,40,350,11,33],"43552921","maker\u002Fpositive\u002Fidea",[352,18,44,220,353,40],"43560175","lunatuna",[355,18,40,229,11,33],"43560385",[115,357,44,247,116,40],13,[359,357,40,360,11,33],"43552401","maker\u002Fneutral\u002Fperformance",[362,357,44,247,116,40],"43553758",[364,357,40,360,11,33],"43553182",[366,367,44,220,368,40],"43553434",14,"defenestrated",[370,367,40,220,11,33],"43555080",[372,373,44,247,374,40],"43554742",15,"simon_acca",[376,373,40,247,11,33],"43554956",[126,378,44,379,127,40],16,"project\u002Fneutral\u002Fdesign",[83,378,40,220,11,33],[382,378,44,220,383,40],"43552405","dylan604",[385,378,40,350,11,33],"43552417",[387,378,45,388,127,40],"43557853","maker\u002Fpositive\u002Fexecution",[390,378,40,350,11,33],"43558340",[392,393,44,247,394,40],"43555889",17,"axegon_",[148,396,44,379,149,40],18,[398,396,40,379,11,33],"43554961",[400,401,44,220,402,40],"43554173",19,"improbableinf",[404,401,40,220,11,33],"43555065",[406,407,45,285,408,40],"43553286",20,"iJohnDoe",[410,407,40,411,11,33],"43555137","project\u002Fneutral\u002Fpricing",[413,414,40,238,415,40],"43558561",21,"ashoeafoot",[417,418,44,379,419,40],"43552275",22,"addled",[421,418,40,379,11,33],"43552326",[423,424,44,220,425,40],"43552826",23,"kej",[427,424,40,428,11,33],"43552875","maker\u002Fneutral\u002Fnone",[430,431,44,247,432,40],"43552953",24,"methou",[434,431,40,247,11,33],"43552984",[155,436,44,437,156,40],25,"project\u002Fmixed\u002Fidea",[439,440,40,238,441,40],"43554886",26,"DoingIsLearning",[],[444,449,454,459,464,468],{"id":445,"name":446,"points":447,"category":448},"43543241","Nue",756,"dev_tools",{"id":450,"name":451,"points":452,"category":453},"43543235","FluentSubs",472,"languages",{"id":455,"name":456,"points":457,"category":458},"43514383","Pomodoro",315,"hardware",{"id":460,"name":461,"points":462,"category":463},"43532967","WhatsApp MCP",229,"ai",{"id":465,"name":466,"points":467,"category":463},"43549072","OmniAI OCR benchmark",211,{"id":469,"name":470,"points":471,"category":472},"43520953","pg-mcp",167,"data",false,"v2",{"id":476,"name":5,"line":6,"ai":473,"cat":20,"year":13,"points":14,"comments":15,"rec":28,"s":477,"top":18,"kw":478,"maker":11,"domain":10,"tier":19,"attempts":40,"strip":479,"url":9,"mix":480,"praise":95,"objection":108,"sub":21},43551767,0.06,[24,25,26,27],"1113030053135300013310553533333353353333",[31,32,33,34],1793991116441]