fixed sog/cog NMEA formatting

nmea.py

@@ -111,8 +111,8 @@ def update(self, lat, lon, hdg, sog, cog, twd, tws, curTime):
         dateStr = curTime.strftime(NMEA_DATE_FORMAT)
         posStr = geo.latlon_to_nmea(lat, lon)
         hdgStr = str(round(hdg,1)) + ",T"
-        sogStr = str(round(sog,1))
-        cogStr = str(round(cog,1))
+        sogStr = geo.format_sog(str(round(sog,1)))
+        cogStr = geo.format_sog(str(round(cog,1)))
         # NMEA TWA is bearing, not heading
         twaStr = str(round(geo.wrap_angle(twd-hdg),1)) + ",T"
         twsStr = str(round(tws,1)) + ",N"
@@ -144,7 +144,7 @@ def __init__(self, port=SERVER_PORT):
         self.serverport = port
 
     def version():
-        return "(v0.1.4)"
+        return "(v0.1.4a)"
 
     def start(self):
         # start the TCP server

utils.py

@@ -87,6 +87,13 @@ def deg_to_dms(deg, type='lat', fmt='dms'):
         s = (deg - d - m / 60) * 3600.00
         return '{}{}º{}\'{:.2f}"'.format(compass_str, abs(d), abs(m), abs(s))
 
+    def format_sog(sogStr:str):
+        decimalLoc = sogStr.find(".")
+        if decimalLoc == -1 or decimalLoc == (len(sogStr)-1):
+            return "{}.0".format(sogStr.zfill(3))
+
+        return "{}.{}".format(sogStr[:decimalLoc].zfill(3), sogStr[decimalLoc+1:decimalLoc+2])
+
     def latlon_to_nmea(lat, lon):
         return geo.deg_to_dms(lat,'lat','nmea')+","+geo.deg_to_dms(lon,'lon','nmea')