Initial meisei IMS-100 support.

auto_rx/auto_rx.py

@@ -451,8 +451,12 @@ def telemetry_filter(telemetry):
     # Regex to check DFM06/09/15/17 callsigns. Also catches the 'unknown' types (xC, xD, etc)
     dfm_callsign_valid = re.match(r'DFM[01x][5679CD]-\d{6}', _serial)
 
+    # Check Meisei sonde callsigns for validity.
+    # meisei_ims returns a callsign of IMS100-0 until it receives the serial number, so we filter based on the 0 being present or not.
+    meisei_callsign_valid = int(_serial.split('-')[1]) != 0
+
     # If Vaisala or DFMs, check the callsigns are valid. If M10, iMet or LMS6, just pass it through.
-    if vaisala_callsign_valid or dfm_callsign_valid or ('M10' in telemetry['type']) or ('MK2LMS' in telemetry['type']) or ('LMS6' in telemetry['type']) or ('iMet' in telemetry['type']):
+    if vaisala_callsign_valid or dfm_callsign_valid or meisei_callsign_valid or ('M10' in telemetry['type']) or ('MK2LMS' in telemetry['type']) or ('LMS6' in telemetry['type']) or ('iMet' in telemetry['type']):
         return True
     else:
         _id_msg = "Payload ID %s is invalid." % telemetry['id']

auto_rx/autorx/__init__.py

@@ -17,7 +17,7 @@
 # MINOR - New sonde type support, other fairly big changes that may result in telemetry or config file incompatability issus.
 # PATCH - Small changes, or minor feature additions.
 
-__version__ = "1.1.3.3"
+__version__ = "1.1.4-beta1"
 
 
 # Global Variables

auto_rx/autorx/aprs.py

@@ -82,6 +82,15 @@ def telemetry_to_aprs_position(sonde_data, object_name="<id>", aprs_comment="BOM
             _id_hex = hex(_id_suffix).upper()
             _object_name = "LMS6" + _id_hex[-5:]
 
+        elif 'MEISEI' in sonde_data['type']:
+            # Convert the serial number to an int
+            _meisei_id = int(sonde_data['id'].split('-')[-1])
+            _id_suffix = hex(_meisei_id).upper().split('0X')[1]
+            # Clip to 6 hex digits, in case we end up with more for some reason.
+            if len(_id_suffix) > 6:
+                _id_suffix = _id_suffix[-6:]
+            _object_name = "IMS" + _id_suffix
+
         # New Sonde types will be added in here.
         else:
             # Unknown sonde type, don't know how to handle this yet.

auto_rx/autorx/config.py

@@ -263,7 +263,7 @@ def read_auto_rx_config(filename, no_sdr_test=False):
 
 		# New demod tweaks - Added 2019-04-23
 		# Default to all experimental decoders off.
-		auto_rx_config['experimental_decoders'] = {'RS41': False, 'RS92': False, 'DFM': False, 'M10': False, 'iMet': False, 'LMS6': True, 'MK2LMS': False}
+		auto_rx_config['experimental_decoders'] = {'RS41': False, 'RS92': False, 'DFM': False, 'M10': False, 'iMet': False, 'LMS6': True, 'MK2LMS': False, 'MEISEI': False}
 		auto_rx_config['rs41_drift_tweak'] = config.getboolean('advanced', 'drift_tweak')
 		auto_rx_config['decoder_spacing_limit'] = config.getint('advanced', 'decoder_spacing_limit')
 		auto_rx_config['decoder_stats'] = config.getboolean('advanced', 'enable_stats')

auto_rx/autorx/decode.py

@@ -20,7 +20,7 @@
 from .sonde_specific import *
 
 # Global valid sonde types list.
-VALID_SONDE_TYPES = ['RS92', 'RS41', 'DFM', 'M10', 'iMet', 'MK2LMS', 'LMS6']
+VALID_SONDE_TYPES = ['RS92', 'RS41', 'DFM', 'M10', 'iMet', 'MK2LMS', 'LMS6', 'MEISEI']
 
 # Known 'Drifty' Radiosonde types
 # NOTE: Due to observed adjacent channel detections of RS41s, the adjacent channel decoder restriction
@@ -68,7 +68,8 @@ class SondeDecoder(object):
         'heading'   : 0.0
     }
 
-    VALID_SONDE_TYPES = ['RS92', 'RS41', 'DFM', 'M10', 'iMet', 'MK2LMS', 'LMS6']
+    # TODO: Use the global valid sonde type list.
+    VALID_SONDE_TYPES = ['RS92', 'RS41', 'DFM', 'M10', 'iMet', 'MK2LMS', 'LMS6', 'MEISEI']
 
     def __init__(self,
         sonde_type="None",
@@ -395,6 +396,20 @@ def generate_decoder_command(self):
 
             decode_cmd += "./lms6mod --json 2>/dev/null"
 
+        elif self.sonde_type == "MEISEI":
+            # Meisei IMS-100 Sondes
+            # Starting out with a 15 kHz bandwidth filter.
+
+            decode_cmd = "%s %s-p %d -d %s %s-M fm -F9 -s 15k -f %d 2>/dev/null |" % (self.sdr_fm, bias_option, int(self.ppm), str(self.device_idx), gain_param, self.sonde_freq)
+            decode_cmd += "sox -t raw -r 15k -e s -b 16 -c 1 - -r 48000 -b 8 -t wav - highpass 20 2>/dev/null |"
+
+            # Add in tee command to save audio to disk if debugging is enabled.
+            if self.save_decode_audio:
+                decode_cmd += " tee decode_%s.wav |" % str(self.device_idx)
+
+            # Meisei IMS-100 decoder
+            decode_cmd += "./meisei_ims --json 2>/dev/null"
+
         else:
             return None
 
@@ -562,6 +577,7 @@ def generate_decoder_command_experimental(self):
         elif self.sonde_type == "iMet":
             # iMet-4 Sondes
             # These are AFSK and hence cannot be decoded using fsk_demod.
+            # Note: This block can probably be removed, as we should never be trying to start up an experimental demod for this sonde type.
 
             decode_cmd = "%s %s-p %d -d %s %s-M fm -F9 -s 15k -f %d 2>/dev/null |" % (self.sdr_fm, bias_option, int(self.ppm), str(self.device_idx), gain_param, self.sonde_freq)
             decode_cmd += "sox -t raw -r 15k -e s -b 16 -c 1 - -r 48000 -b 8 -t wav - highpass 20 2>/dev/null |"

auto_rx/autorx/scan.py

@@ -281,17 +281,6 @@ def detect_sonde(frequency, rs_path="./", dwell_time=10, sdr_fm='rtl_fm', device
 
 
 
-    # dft_detect return codes:
-    # 2 = DFM
-    # 3 = RS41
-    # 4 = RS92
-    # 5 = M10
-    # 6 = IMET (AB)
-    # 7 = IMET (RS)
-    # 8 = LMS6
-    # 9 = C34/C50
-    # 10 = MK2LMS (1680 MHz LMS6, which uses the MK2A telemetry format)
-
     # Split the line into sonde type and correlation score.
     _fields = ret_output.split(':')
 
@@ -333,6 +322,13 @@ def detect_sonde(frequency, rs_path="./", dwell_time=10, sdr_fm='rtl_fm', device
             return '-MK2LMS'
         else:
             return 'MK2LMS'
+    elif 'MEISEI' in _type:
+        logging.debug("Scanner #%s - Detected a Meisei Sonde! (Score: %.2f)" % (str(device_idx), _score))
+        # Not currently sure if we expect to see inverted Meisei sondes.
+        if _score < 0:
+            return '-MEISEI'
+        else:
+            return 'MEISEI'
     else:
         return None
 

auto_rx/autorx/utils.py

@@ -30,7 +30,7 @@
 
 
 # List of binaries we check for on startup
-REQUIRED_RS_UTILS = ['dft_detect', 'dfm09mod', 'm10', 'imet1rs_dft', 'rs41mod', 'rs92mod', 'fsk_demod', 'mk2a_lms1680', 'lms6mod']
+REQUIRED_RS_UTILS = ['dft_detect', 'dfm09mod', 'm10', 'imet1rs_dft', 'rs41mod', 'rs92mod', 'fsk_demod', 'mk2a_lms1680', 'lms6mod', 'meisei_ims']
 
 def check_rs_utils():
     """ Check the required RS decoder binaries exist

auto_rx/build.sh

@@ -40,6 +40,10 @@ echo "Building iMet Demodulator."
 cd ../imet/
 gcc imet1rs_dft.c -lm -o imet1rs_dft
 
+echo "Building Meisei Demodulator."
+cd ../meisei/
+gcc meisei_ims.c -lm -o meisei_ims
+
 echo "Building fsk-demod utils from codec2"
 cd ../utils/
 # This produces a static build of fsk_demod
@@ -58,6 +62,7 @@ cp ../demod/dfm09ecc .
 cp ../m10/m10 .
 cp ../utils/fsk_demod .
 cp ../imet/imet1rs_dft .
+cp ../meisei/meisei_ims .
 cp ../mk2a/mk2a_lms1680 .
 
 cp ../demod/mod/rs41mod .