{"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\/it\/blog\/novosti-interneta\/meshtastic-realizacziya-samodostatochnoj-mesh-seti-na-baze-peredatchikov-lora","title":{"rendered":"Meshtastic — implementazione di una rete mesh autosufficiente basata su trasmettitori LoRa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Il progetto Meshtastic sviluppa una piattaforma di comunicazione aperta per creare una rete decentralizzata di messaggistica autosufficiente, in cui ogni punto della rete \u00e8 collegato tramite punti vicini, senza l'uso di router centralizzati. Per la trasmissione del segnale vengono utilizzati trasmettitori basati sul protocollo LoRa, che consentono di trasmettere dati in bande di frequenza non licenziate a velocit\u00e0 di alcuni kilobit al secondo su distanze di decine o addirittura centinaia di chilometri (gli utenti di Meshtastic hanno stabilito un record di 254 km). <\/p>\n

Il progetto pu\u00f2 essere utilizzato per organizzare comunicazioni in aree remote, durante operazioni di ricerca o praticando sport (ad esempio, il parapendio) in luoghi privi di infrastrutture o in condizioni di scarsa copertura da parte degli operatori di telefonia mobile. In alcune aree, i partecipanti possono posizionare trasmettitori autonomi che ritrasmettono messaggi alimentati da pannelli solari, mentre gli stessi partecipanti possono avere dispositivi LoRa locali che trasmettono segnali e sono controllati tramite connessione a smartphone tramite il protocollo Bluetooth.

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

Ogni partecipante alla rete pu\u00f2 inviare e visualizzare messaggi di testo, nonch\u00e9 utilizzare strumenti di geolocalizzazione basati su GPS per trovare altri partecipanti. Grazie alla costruzione di una rete mesh, i messaggi vengono inoltrati a catena, consentendo a ciascuno nel gruppo di ricevere messaggi dal partecipante pi\u00f9 lontano, indipendentemente dalla capacit\u00e0 di stabilire un canale di comunicazione diretto con lui. \u00c8 possibile inviare messaggi sia broadcast che indirizzati a un partecipante specifico. I messaggi trasmessi sono criptati utilizzando chiavi PSK (pre-shared key) preselezionate e l'algoritmo AES256. <\/p>\n

Il protocollo di trasmissione \u00e8 piuttosto semplice: ogni pacchetto viene inviato in modalit\u00e0 broadcast, dopodich\u00e9 l'aria viene analizzata per verificare l'arrivo di una conferma di ricezione da parte di uno dei partecipanti. Se la conferma non viene ricevuta, vengono effettuati altri tre tentativi di invio dopo un determinato timeout. Al ricevimento del pacchetto, viene controllato se tale pacchetto era gi\u00e0 arrivato in passato; se s\u00ec, viene ignorato, altrimenti viene ritrasmesso agli altri partecipanti. Ad ogni trasmissione, il conteggio degli hop nel pacchetto diminuisce e al raggiungimento di zero, la ritrasmissione del pacchetto viene interrotta. <\/p>\n

Il codice firmware per i trasmettitori \u00e8 scritto in linguaggi C\/C++ e distribuito sotto licenza GPLv3. Sono inoltre fornite applicazioni mobili per lavorare con la rete mesh su smartphone con piattaforme Android e iOS, cos\u00ec come un'interfaccia web e una libreria Python per automatizzare l'invio e la ricezione dei messaggi. I firmware sono preparati per diverse schede basate su chip ESP32, nRF52 e RP2040, come RAK Meshtastic Start Kit (RAK4631 nRF52840, RAK11200 ESP32, RAK11310 RP2040), Station G1, LILYGO LoRa T3-S3, Nano G1, HELTEC LoRa V3 e Raspberry Pi Pico con modulo SX1262.

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

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Per la trasmissione del segnale vengono utilizzati trasmettitori basati sul protocollo LoRa, che consentono di trasmettere dati in bande di frequenza non licenziate a velocit\u00e0 di alcuni kilobit al secondo su distanze di decine o addirittura centinaia.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/meshtastic-realizacziya-samodostatochnoj-mesh-seti-na-baze-peredatchikov-lora","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47Meshtastic \u2014 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f 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