{"id":112830,"date":"2024-01-11T21:10:13","date_gmt":"2024-01-11T19:10:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/meshtastic-realizacziya-samodostatochnoj-mesh-seti-na-baze-peredatchikov-lora"},"modified":"2024-01-11T21:10:13","modified_gmt":"2024-01-11T19:10:16","slug":"meshtastic-realizacziya-samodostatochnoj-mesh-seti-na-baze-peredatchikov-lora","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/meshtastic-realizacziya-samodostatochnoj-mesh-seti-na-baze-peredatchikov-lora","title":{"rendered":"Meshtastic — o implementare a unei re\u021bele mesh autonome bazate pe emi\u021b\u0103toare LoRa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Proiectul Meshtastic dezvolt\u0103 o platform\u0103 de comunica\u021bie deschis\u0103 pentru crearea unei re\u021bele de mesagerie descentralizate, auto-suficiente, \u00een care fiecare punct de re\u021bea este conectat prin puncte vecine, f\u0103r\u0103 a utiliza routere centralizate. Semnalele sunt transmise prin intermediul emi\u021b\u0103toarelor bazate pe protocolul LoRa, care permit transmiterea datelor \u00een spectrul de frecven\u021be necomercializat la viteze de c\u00e2\u021biva kilobi\u021bi pe secund\u0103 pe distan\u021be de zeci sau chiar sute de kilometri (utilizatorii Meshtastic au stabilit un record de 254 km). <\/p>\n

Proiectul poate fi utilizat pentru a organiza comunica\u021bii \u00een zone dificile, pentru desf\u0103\u0219urarea opera\u021biunilor de salvare sau pentru sporturi (de exemplu, parapantism) \u00een zone f\u0103r\u0103 infrastructur\u0103 sau \u00een condi\u021bii de acoperire rar\u0103 din partea operatorilor de telefonie mobil\u0103. \u00cen anumite locuri, participan\u021bii pot plasa emi\u021b\u0103toare autonome, care retransmit mesaje \u0219i sunt alimentate de panouri solare, iar participan\u021bii pot avea dispozitive locale LoRa care transmit semnale \u0219i sunt controlate prin conectarea la smartphone-uri prin protocolul Bluetooth.

\"Meshtastic<\/center> <\/p>\n

Fiecare participant al re\u021belei poate trimite \u0219i vizualiza mesaje text, precum \u0219i utiliza instrumente de geolocalizare bazate pe GPS pentru a g\u0103si al\u021bi participan\u021bi. Datorit\u0103 construc\u021biei re\u021belei mesh, mesajele sunt retransmise \u00een lan\u021b, permi\u021b\u00e2nd fiec\u0103rui membru al grupului s\u0103 primeasc\u0103 mesaje de la cel mai \u00eendep\u0103rtat participant, indiferent de capacitatea de a stabili un canal direct de comunicare cu acesta. Este posibil\u0103 trimiterea at\u00e2t de mesaje difuzate, c\u00e2t \u0219i de mesaje adresate unui anumit participant. Mesajele transmise sunt criptate folosind chei PSK (chei pre\u00eemp\u0103rt\u0103\u0219ite) selectate anterior \u0219i algoritmul AES256. <\/p>\n

Protocolul de transmitere este destul de simplu: fiecare pachet este trimis \u00een mod difuz, dup\u0103 care eterul este analizat pentru a verifica primirea confirm\u0103rii de c\u0103tre unul dintre participan\u021bi. Dac\u0103 confirmation nu este primit, se fac \u00eenc\u0103 trei \u00eencerc\u0103ri de trimitere dup\u0103 un anumit timeout. La primirea unui pachet, se verific\u0103 dac\u0103 acest pachet a fost primit anterior, iar dac\u0103 da, este ignorat, iar dac\u0103 nu \u2014 este retransmis altor participan\u021bi. La fiecare transmitere, contorul de hopuri din pachet scade, iar la atingerea zero, retransmiterea pachetului se opre\u0219te. <\/p>\n

Codul firmware pentru emi\u021b\u0103toare-recep\u021bionere este scris \u00een limbaje C\/C++ \u0219i este distribuit sub licen\u021ba GPLv3. De asemenea, sunt furnizate aplica\u021bii mobile pentru a lucra cu re\u021beaua mesh de pe smartphone-uri pe platformele Android \u0219i iOS, precum \u0219i o interfa\u021b\u0103 web \u0219i o bibliotec\u0103 Python pentru automatizarea trimiterii \u0219i primirii mesajelor. Firmware-ul este preg\u0103tit pentru diverse pl\u0103ci bazate pe cipuri ESP32, nRF52 \u0219i RP2040, cum ar fi RAK Meshtastic Start Kit (RAK4631 nRF52840, RAK11200 ESP32, RAK11310 RP2040), Station G1, LILYGO LoRa T3-S3, Nano G1, HELTEC LoRa V3 \u0219i Raspberry Pi Pico cu modul SX1262.

\"Meshtastic\"Meshtastic\"Meshtastic<\/center>
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":112831,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-112830","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Meshtastic \u2014 o implementare a unei re\u021bele mesh auto-suficiente bazate pe emi\u021b\u0103toare LoRa | ProHoster","description":"Proiectul Meshtastic dezvolt\u0103 o platform\u0103 de comunica\u021bie deschis\u0103 pentru construirea unei re\u021bele de transmisie a mesajelor auto-suficiente \u0219i descentralizate, \u00een care fiecare punct al re\u021belei se conecteaz\u0103 prin puncte 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