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Add trace packet type

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This commit is contained in:
Alex Wolden 2025-04-12 13:02:01 -07:00
parent a5f1ec5c26
commit ea2f17025f
5 changed files with 168 additions and 4 deletions
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44
src/meshcore/reader.py
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@ -230,6 +230,50 @@ class MessageReader:
logger.debug("Received log data")
await self.dispatcher.dispatch(Event(EventType.LOG_DATA, data[1:].decode('utf-8', errors='replace')))
elif packet_type_value == PacketType.TRACE_DATA.value:
logger.debug(f"Received trace data: {data.hex()}")
res = {}
# According to the source, format is:
# 0x89, reserved(0), path_len, flags, tag(4), auth(4), path_hashes[], path_snrs[], final_snr
reserved = data[1]
path_len = data[2]
flags = data[3]
tag = int.from_bytes(data[4:8], byteorder='little')
auth_code = int.from_bytes(data[8:12], byteorder='little')
# Initialize result
res["tag"] = tag
res["auth"] = auth_code
res["flags"] = flags
res["path_len"] = path_len
# Process path as array of objects with hash and SNR
path_nodes = []
if path_len > 0 and len(data) >= 12 + path_len*2 + 1:
# Extract path with hash and SNR pairs
for i in range(path_len):
node = {
"hash": f"{data[12+i]:02x}",
# SNR is stored as a signed byte representing SNR * 4
"snr": (data[12+path_len+i] if data[12+path_len+i] < 128 else data[12+path_len+i] - 256) / 4.0
}
path_nodes.append(node)
# Add the final node (our device) with its SNR
final_snr_byte = data[12+path_len*2]
final_snr = (final_snr_byte if final_snr_byte < 128 else final_snr_byte - 256) / 4.0
path_nodes.append({
"snr": final_snr
})
res["path"] = path_nodes
logger.debug(f"Parsed trace data: {res}")
await self.dispatcher.dispatch(Event(EventType.TRACE_DATA, res))
else:
logger.debug(f"Unhandled data received {data}")
logger.debug(f"Unhandled packet type: {packet_type_value}")