Public Access
twislaandClaude Opus 5.5
8ba41f72b6
- MeshCore joins the presets (EU/UK Narrow: 869.618 MHz, 62.5 kHz, SF8, CR 4/8, sync 0x12), after the Meshtastic ones so stored choices keep their number; `lora preset MeshCore` on the console - lib/meshcore reads what MeshCore sends in clear: header, path, and a node's advert (name, kind, key, position) - the list row, the details, a Capture's viewer and the console echo read a packet by the sync word it was received on - the bandwidth is printed as 62.5, not 62 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0162FokPdvY2KsS4NBfwyWPk
21 lines
1.5 KiB
Markdown
21 lines
1.5 KiB
Markdown
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title = "Capture LoRa packets and open them in Wireshark"
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description = "Record what the radio hears into a pcap file, then read it on a computer."
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weight = 6
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[extra]
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tag = "LoRa Scanner"
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The radio only **listens**: nothing is transmitted. You need the **Cap LoRa-1262** and an **SD card**.
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1. **Open the LoRa Scanner.** The Status Bar shows `L` while the radio listens.
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2. **Pick a preset with <kbd>p</kbd>.** The Scanner offers the 7 Meshtastic presets allowed in EU868 (LongFast is the default) and MeshCore.
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3. **Wait for packets.** Each line is a packet: the time, RSSI and SNR, and for a Meshtastic packet the sender, the receiver and the hops. <kbd>Enter</kbd> shows a packet's header and its bytes.
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4. **Press <kbd>c</kbd> to start a capture.** The Status Bar shows `CAP`. It keeps recording with the App closed.
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5. **Press <kbd>c</kbd> again to stop.**
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6. **Get the file.** It is in `/captures/lora/`, a `.pcap` with LoRaTap headers. In the [Storage App](/guide/storage/) you can already look at its packets; on a computer, open it in Wireshark.
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**What you will and will not see.** Meshtastic's header is never encrypted, so who sent a packet and how far it hopped is visible. The message itself is encrypted with the channel's key, and the Scanner does not decrypt it.
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**Hearing nothing is normal** if no node is in range, or if the preset does not match what the nodes nearby use. The [Sweep](/guide/lora-scanner/) (<kbd>Tab</kbd>) shows whether anything is on the air at all across 863 to 870 MHz.
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