blinry on Nostr: 38: Catch a LoRaWAN chirp This was a bit like trying to catch a rare insect! 🐛 ...
38: Catch a LoRaWAN chirp
This was a bit like trying to catch a rare insect! 🐛
LoRaWAN is a low-power, wide-area networking protocol, intended for "Internet of Things" applications.
You can see transmission in the lower half of the screenshot! It has a very cute structure: You can see eight "down-chirps", followed by two "up-chirps". That's the header, followed by the payload.
To look for the signal, I made a "baseband capture" in SDR++, and opened the recording in sonic-visualizer.
Published at
2024-03-09 10:07:24Event JSON
{
"id": "29775877cd1a9641f6cf5ef01be44d53e48faf75e1cd95171a257e7872e5ba43",
"pubkey": "35ca9beb10f6282bdc518bc22ac2966b915af41e372314e89f32f2db4a5a4689",
"created_at": 1709978844,
"kind": 1,
"tags": [
[
"e",
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"wss://relay.mostr.pub",
"reply"
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[
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"content": "38: Catch a LoRaWAN chirp\n\nThis was a bit like trying to catch a rare insect! 🐛\n\nLoRaWAN is a low-power, wide-area networking protocol, intended for \"Internet of Things\" applications.\n\nYou can see transmission in the lower half of the screenshot! It has a very cute structure: You can see eight \"down-chirps\", followed by two \"up-chirps\". That's the header, followed by the payload.\n\nTo look for the signal, I made a \"baseband capture\" in SDR++, and opened the recording in sonic-visualizer.\n\nhttps://assets.chaos.social/media_attachments/files/112/065/167/749/282/849/original/be27f9c605c4eaad.png",
"sig": "7d4ffbb287789d44235268e8f52d22d69f564173089300c1b313a46b244d99debe4e90c83acbcdefdb938729a18d0d7c0c8d85191c1bd442bb294c52353aa66d"
}
