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decode mic-e device and altitude data

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This commit is contained in:
Jakob Ketterl
2019-08-15 18:08:20 +02:00
parent 439da266a9
commit 6b93973d9b
1 changed files with 139 additions and 64 deletions
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203
owrx/aprs.py
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@@ -6,6 +6,11 @@ import logging
logger = logging.getLogger(__name__)
def decodeBase91(input):
base = decodeBase91(input[:-1]) * 91 if len(input) > 1 else 0
return base + (ord(input[-1]) - 33)
class Ax25Parser(object):
def parse(self, ax25frame):
@@ -26,7 +31,7 @@ class Ax25Parser(object):
}
def extractCallsign(self, input):
cs = bytes([b >> 1 for b in input[0:6]]).decode().strip()
cs = bytes([b >> 1 for b in input[0:6]]).decode('us-ascii').strip()
ssid = (input[6] & 0b00011110) >> 1
if ssid > 0:
return "{callsign}-{ssid}".format(callsign=cs, ssid=ssid)
@@ -49,17 +54,20 @@ class AprsParser(object):
def parse(self, raw):
for frame in self.deframer.parse(raw):
data = self.ax25parser.parse(frame)
try:
data = self.ax25parser.parse(frame)
# TODO how can we tell if this is an APRS frame at all?
aprsData = self.parseAprsData(data)
# TODO how can we tell if this is an APRS frame at all?
aprsData = self.parseAprsData(data)
logger.debug(aprsData)
if "lat" in aprsData and "lon" in aprsData:
loc = LatLngLocation(aprsData["lat"], aprsData["lon"], aprsData["comment"] if "comment" in data else None)
Map.getSharedInstance().updateLocation(data["source"], loc, "APRS", self.band)
logger.debug(aprsData)
if "lat" in aprsData and "lon" in aprsData:
loc = LatLngLocation(aprsData["lat"], aprsData["lon"], aprsData["comment"] if "comment" in aprsData else None)
Map.getSharedInstance().updateLocation(data["source"], loc, "APRS", self.band)
self.handler.write_aprs_data(aprsData)
self.handler.write_aprs_data(aprsData)
except Exception:
logger.exception("exception while parsing aprs data")
def hasCompressedCoordinatesx(self, raw):
return raw[0] == "/" or raw[0] == "\\"
@@ -78,35 +86,127 @@ class AprsParser(object):
}
def parseCompressedCoordinates(self, raw):
def decodeBase91(input):
base = decodeBase91(input[:-1]) * 91 if len(input) > 1 else 0
return base + (ord(input[-1]) - 33)
return {
"lat": 90 - decodeBase91(raw[1:5]) / 380926,
"lon": -180 + decodeBase91(raw[5:9]) / 190463,
"symbol": raw[9]
}
def parseMicEFrame(self, data):
def parseAprsData(self, data):
information = data["data"]
# forward some of the ax25 data
aprsData = {
"source": data["source"],
"destination": data["destination"],
"path": data["path"]
}
if information[0] == 0x1c or information[0] == 0x60:
parser = MicEParser()
aprsData.update(parser.parse(data))
return aprsData
information = information.decode('us-ascii')
logger.debug(information)
if information[0] == "!" or information[0] == "=":
# position without timestamp
aprsData.update(self.parseRegularAprsData(information[1:]))
elif information[0] == "/" or information[0] == "@":
# position with timestamp
# TODO parse timestamp
aprsData.update(self.parseRegularAprsData(information[8:]))
return aprsData
def parseRegularAprsData(self, information):
if self.hasCompressedCoordinatesx(information):
aprsData = self.parseCompressedCoordinates(information[0:10])
aprsData["comment"] = information[10:]
else:
aprsData = self.parseUncompressedCoordinates(information[0:19])
aprsData["comment"] = information[19:]
return aprsData
class MicEParser(object):
def extractNumber(self, input):
n = ord(input)
if n >= ord("P"):
return n - ord("P")
if n >= ord("A"):
return n - ord("A")
return n - ord("0")
def listToNumber(self, input):
base = self.listToNumber(input[:-1]) * 10 if len(input) > 1 else 0
return base + input[-1]
def extractAltitude(self, comment):
if len(comment) < 4 or comment[3] != "}":
return (comment, None)
return comment[4:], decodeBase91(comment[:3]) - 10000
def extractDevice(self, comment):
if comment[0] == ">":
if comment[-1] == "=":
return comment[1:], {"manufacturer": "Kenwood", "device": "TH-D72"}
if comment[-1] == "^":
return comment[1:], {"manufacturer": "Kenwood", "device": "TH-D74"}
return comment[1:], {"manufacturer": "Kenwood", "device": "TH-D7A"}
if comment[0] == "]":
if comment[-1] == "=":
return comment[1:], {"manufacturer": "Kenwood", "device": "TM-D710"}
return comment[1:], {"manufacturer": "Kenwood", "device": "TM-D700"}
if comment[0] == "`" or comment[0] == "'":
if comment[-2] == "_":
devices = {
"b": "VX-8",
"\"": "FTM-350",
"#": "VX-8G",
"$": "FT1D",
"%": "FTM-400DR",
")": "FTM-100D",
"(": "FT2D",
"0": "FT3D",
}
return comment[1:-2], {"manufacturer": "Yaesu", "device": devices.get(comment[-1], "Unknown")}
if comment[-2:] == " X":
return comment[1:-2], {"manufacturer": "SainSonic", "device": "AP510"}
if comment[-2] == "(":
devices = {
"5": "D578UV",
"8": "D878UV"
}
return comment[1:-2], {"manufacturer": "Anytone", "device": devices.get(comment[-1], "Unknown")}
if comment[-2] == "|":
devices = {
"3": "TinyTrack3",
"4": "TinyTrack4"
}
return comment[1:-2], {"manufacturer": "Byonics", "device": devices.get(comment[-1], "Unknown")}
if comment[-2:] == "^v":
return comment[1:-2], {"manufacturer": "HinzTec", "device": "anyfrog"}
if comment[-2] == ":":
devices = {
"4": "P4dragon DR-7400 modem",
"8": "P4dragon DR-7800 modem"
}
return comment[1:-2], {"manufacturer": "SCS GmbH & Co.", "device": devices.get(comment[-1], "Unknown")}
if comment[-2:] == "~v":
return comment[1:-2], {"manufacturer": "Other", "device": "Other"}
return comment[1:-2], None
return comment, None
def parse(self, data):
information = data["data"]
destination = data["destination"]
def extractNumber(input):
n = ord(input)
if n >= ord("P"):
return n - ord("P")
if n >= ord("A"):
return n - ord("A")
return n - ord("0")
def listToNumber(input):
base = listToNumber(input[:-1]) * 10 if len(input) > 1 else 0
return base + input[-1]
logger.debug(destination)
rawLatitude = [extractNumber(c) for c in destination[0:6]]
rawLatitude = [self.extractNumber(c) for c in destination[0:6]]
logger.debug(rawLatitude)
lat = listToNumber(rawLatitude[0:2]) + listToNumber(rawLatitude[2:6]) / 6000
lat = self.listToNumber(rawLatitude[0:2]) + self.listToNumber(rawLatitude[2:6]) / 6000
if ord(destination[3]) <= ord("9"):
lat *= -1
@@ -130,44 +230,19 @@ class AprsParser(object):
if ord(destination[5]) >= ord("P"):
lon *= -1
comment = information[9:].decode('us-ascii').strip()
(comment, altitude) = self.extractAltitude(comment)
(comment, device) = self.extractDevice(comment)
# altitude might be inside the device string, so repeat and choose one
(comment, insideAltitude) = self.extractAltitude(comment)
altitude = next((a for a in [altitude, insideAltitude] if a is not None), None)
return {
"lat": lat,
"lon": lon,
"comment": information[9:].decode()
"comment": comment,
"altitude": altitude,
"device": device,
}
def parseAprsData(self, data):
information = data["data"]
# forward some of the ax25 data
aprsData = {
"source": data["source"],
"destination": data["destination"],
"path": data["path"]
}
if information[0] == 0x1c or information[0] == 0x60:
aprsData.update(self.parseMicEFrame(data))
return aprsData
information = information.decode()
logger.debug(information)
if information[0] == "!" or information[0] == "=":
# position without timestamp
aprsData.update(self.parseRegularAprsData(information[1:]))
elif information[0] == "/" or information[0] == "@":
# position with timestamp
# TODO parse timestamp
aprsData.update(self.parseRegularAprsData(information[8:]))
return aprsData
def parseRegularAprsData(self, information):
if self.hasCompressedCoordinatesx(information):
aprsData = self.parseCompressedCoordinates(information[0:10])
aprsData["comment"] = information[10:]
else:
aprsData = self.parseUncompressedCoordinates(information[0:19])
aprsData["comment"] = information[19:]
return aprsData